130 results on '"Olesen, Anne Estrup"'
Search Results
102. Multivariate Analysis of Single-Sweep Evoked Brain Potentials for Pharmaco-Electroencephalography
- Author
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Graversen, Carina, primary, Olesen, Anne Estrup, additional, Staahl, Camilla, additional, Drewes, Asbjørn Mohr, additional, and Farina, Dario, additional
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- 2015
- Full Text
- View/download PDF
103. Population Pharmacokinetics of Morphine and Morphine-6-Glucuronide following Rectal Administration -A Dose Escalation Study
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Brokjær, Anne, Kreilgaard, Mads, Olesen, Anne Estrup, Simonsson, Ulrika S H, Christrup, Lona Louring, Dahan, Albert, Drewes, Asbjørn Mohr, Brokjær, Anne, Kreilgaard, Mads, Olesen, Anne Estrup, Simonsson, Ulrika S H, Christrup, Lona Louring, Dahan, Albert, and Drewes, Asbjørn Mohr
- Abstract
INTRODUCTION: To safely and effectively administer morphine as liquid formulation via the rectal route, a thorough understanding of the pharmacokinetics is warranted. The aims were: 1) to develop a population pharmacokinetic model of liquid rectal morphine and morphine-6-glucoronide (M6G), 2) to simulate clinically relevant rectal doses of morphine and 3) to assess the tolerability and safety.MATERIAL AND METHODS: This open label, dose escalation, four-sequence study was conducted in 10 healthy males. Three escalating doses of morphine hydrochloride (10 mg, 15 mg and 20 mg) were administered 20 cm from the anal verge. A 2 mg morphine hydrochloride dose was administered intravenously as reference. Blood samples were drawn at baseline and at nine time points post dosing. Serum was obtained by centrifugation and assayed for contents of morphine and M6G with a validated high performance liquid chromatographic method. Modelling was performed using NONMEM 7.2 and the first order conditional estimation method with interaction.RESULTS: A two compartment distribution model with one absorption transit compartment for rectal administration and systemic clearance from the central compartment best described data. Systemic PK parameters were allometric scaled with body weight. The mean morphine absorption transit time was 0.6 hours, clearance 78 L/h [relative standard error (RSE) 12%] and absolute bioavailability 24% (RSE 11%). To obtain clinically relevant serum concentrations, simulations revealed that a single morphine hydrochloride dose of 35 mg will provide sufficient peak serum concentration levels and a 46 mg dose four times daily is suggested to maintain clinically relevant steady-state concentrations. Body weight was suggested to be an important covariate for morphine exposure. No severe side effects were observed.CONCLUSION: A population pharmacokinetic model of liquid rectal morphine and M6G was developed. The model can be used to simulate recta
- Published
- 2014
104. Cingulate metabolites during pain and morphine treatment as assessed by magnetic resonance spectroscopy
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Hansen,Tine Maria, Olesen,Anne Estrup, Simonsen,Carsten Wiberg, Drewes,Asbjørn Mohr, Frøkjær,Jens Brøndum, Hansen,Tine Maria, Olesen,Anne Estrup, Simonsen,Carsten Wiberg, Drewes,Asbjørn Mohr, and Frøkjær,Jens Brøndum
- Abstract
Tine Maria Hansen,1 Anne Estrup Olesen,2 Carsten Wiberg Simonsen,1 Asbjørn Mohr Drewes,2,3 Jens Brøndum Frøkjær11Mech-Sense, Department of Radiology, 2Mech-Sense, Department of Gastroenterology, 3Center for Sensory-Motor Interaction, Department of Health Science and Technology, Aalborg University, Aalborg, DenmarkBackground: Experimental investigation of cerebral mechanisms underlying pain and analgesia are important in the development of methods for diagnosis and treatment of pain. The aim of the current study was to explore brain metabolites in response to pain and treatment with morphine.Methods: Proton magnetic resonance spectroscopy of the anterior cingulate cortex was performed in 20 healthy volunteers (13 males and seven females, aged 24.9±2.6 years) during rest and acute pain before and during treatment with 30 mg of oral morphine or placebo in a randomized, double-blinded, cross-over study design. Pain was evoked by skin stimulation applied to the right upper leg using a contact heat-evoked potential stimulator.Results: Data from 12 subjects were valid for analysis. Painful stimulation induced an increase in N-acetylaspartate/creatine compared with rest (F=5.5, P=0.04). During treatment with morphine, painful stimulation induced decreased glutamate/creatine (F=7.3, P=0.02), myo-inositol/creatine (F=8.38, P=0.02), and N-acetylaspartate/creatine (F=13.8, P=0.004) concentrations, whereas an increase in the pain-evoked N-acetylaspartate/creatine concentration (F=6.1, P=0.04) was seen during treatment with placebo.Conclusion: This explorative study indicates that neuronal metabolites in the anterior cingulate cortex, such as N-acetylaspartate, glutamate, and myo-inositol, could be related to the physiology of pain and treatment with morphine. This experimental method has the potential to enable the study of brain metabolites involved in pain and its treatment, and may in the future be used to provide further
- Published
- 2014
105. Sensitivity of quantitative sensory models to morphine analgesia in humans
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Olesen,Anne Estrup, Brock,Christina, Sverrisdóttir,Eva, Larsen,Isabelle Myriam, Drewes,Asbjørn Mohr, Olesen,Anne Estrup, Brock,Christina, Sverrisdóttir,Eva, Larsen,Isabelle Myriam, and Drewes,Asbjørn Mohr
- Abstract
Anne Estrup Olesen,1,2 Christina Brock,1,2 Eva Sverrisdóttir,2 Isabelle Myriam Larsen,1 Asbjørn Mohr Drewes1,3 1Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; 2Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; 3Department of Clinical Medicine, Aalborg University, Aalborg, Denmark Introduction: Opioid analgesia can be explored with quantitative sensory testing, but most investigations have used models of phasic pain, and such brief stimuli may be limited in the ability to faithfully simulate natural and clinical painful experiences. Therefore, identification of appropriate experimental pain models is critical for our understanding of opioid effects with the potential to improve treatment. Objectives: The aim was to explore and compare various pain models to morphine analgesia in healthy volunteers. Methods: The study was a double-blind, randomized, two-way crossover study. Thirty-nine healthy participants were included and received morphine 30 mg (2 mg/mL) as oral solution or placebo. To cover both tonic and phasic stimulations, a comprehensive multi-modal, multi-tissue pain-testing program was performed. Results: Tonic experimental pain models were sensitive to morphine analgesia compared to placebo: muscle pressure (F=4.87, P=0.03), bone pressure (F=3.98, P=0.05), rectal pressure (F=4.25, P=0.04), and the cold pressor test (F=25.3, P<0.001). Compared to placebo, morphine increased tolerance to muscle stimulation by 14.07%; bone stimulation by 9.72%; rectal mechanical stimulation by 20.40%, and reduced pain reported during the cold pressor test by 9.14%. In contrast, the more phasic experimental pain models were not sensitive to morphine analgesia: skin heat, rectal electrical stimulation, or rectal heat stimulation (all P>0.05). Conclusion: Pain models with deep tonic stimulation including C
- Published
- 2014
106. Clinical potential of naloxegol in the management of opioid-induced bowel dysfunction
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Poulsen,Jakob Lykke, Brock,Christina, Olesen,Anne Estrup, Nilsson,Matias, Drewes,Asbjørn Mohr, Poulsen,Jakob Lykke, Brock,Christina, Olesen,Anne Estrup, Nilsson,Matias, and Drewes,Asbjørn Mohr
- Abstract
Jakob Lykke Poulsen,1 Christina Brock,1,2 Anne Estrup Olesen,1,2 Matias Nilsson,1 Asbjørn Mohr Drewes1,3 1Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Aalborg, Denmark; 2Department of Drug Design and Pharmacology, University of Copenhagen, Copenhagen, Denmark; 3Department of Clinical Medicine, Aalborg University, Aalborg, DenmarkAbstract: Opioid-induced bowel dysfunction (OIBD) is a burdensome condition which limits the therapeutic benefit of analgesia. It affects the entire gastrointestinal tract, predominantly by activating opioid receptors in the enteric nervous system, resulting in a wide range of symptoms, such as reflux, bloating, abdominal cramping, hard, dry stools, and incomplete evacuation. The majority of studies evaluating OIBD focus on constipation experienced in approximately 60% of patients. Nevertheless, other presentations of OIBD seem to be equally frequent. Furthermore, laxative treatment is often insufficient, which in many patients results in decreased quality of life and discontinuation of opioid treatment. Novel mechanism-based pharmacological approaches targeting the gastrointestinal opioid receptors have been marketed recently and even more are in the pipeline. One strategy is prolonged release formulation of the opioid antagonist naloxone (which has limited systemic absorption) and oxycodone in a combined tablet. Another approach is peripherally acting, µ-opioid receptor antagonists (PAMORAs) that selectively target µ-opioid receptors in the gastrointestinal tract. However, in Europe the only PAMORA approved for OIBD is the subcutaneously administered methylnaltrexone. Alvimopan is an oral PAMORA, but only approved in the US for postoperative ileus in hospitalized patients. Finally, naloxegol is a novel, oral PAMORA expected to be approved soon. In this review, the prevalence and pathophysiology of OIBD is presented. As PAMORAs seem to be a promising approach, their p
- Published
- 2014
107. Randomized clinical trial: efficacy and safety of PPC-5650 on experimental esophageal pain and hyperalgesia in healthy volunteers
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Olesen, Anne Estrup, primary, Nielsen, Lecia Møller, additional, Larsen, Isabelle Myriam, additional, and Drewes, Asbjørn Mohr, additional
- Published
- 2014
- Full Text
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108. Sensitivity of quantitative sensory models to morphine analgesia in humans
- Author
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Olesen, Anne Estrup, primary, Brock, Christina, additional, Sverrisdóttir, Eva, additional, Larsen, Isabelle, additional, and Drewes, Asbjørn, additional
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- 2014
- Full Text
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109. Efficacy and Safety of PPC-5650 on Experimental Rectal Pain in Patients with Irritable Bowel Syndrome
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Nielsen, Lecia Møller, primary, Olesen, Anne Estrup, additional, Andresen, Trine, additional, Simrén, Magnus, additional, Törnblom, Hans, additional, and Drewes, Asbjørn Mohr, additional
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- 2014
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110. Pharmacologic treatments for esophageal disorders
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Blackshaw, L. Ashley, primary, Bordin, Dmitry S., additional, Brock, Christina, additional, Brokjaer, Anne, additional, Drewes, Asbjørn Mohr, additional, Farmer, Adam D., additional, Krarup, Anne Lund, additional, Lottrup, Christian, additional, Masharova, Antonina A., additional, Moawad, Fouad J., additional, and Olesen, Anne Estrup, additional
- Published
- 2014
- Full Text
- View/download PDF
111. Cingulate metabolites during pain and morphine treatment as assessed by magnetic resonance spectroscopy
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Froekjaer, Jens Broendum, primary, Olesen, Anne Estrup, additional, Simonsen, Carsten Wiberg, additional, Drewes, Asbjoern Mohr, additional, and Hansen, Tine, additional
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- 2014
- Full Text
- View/download PDF
112. Modelling analgesia-concentration relationships for morphine to evaluate experimental pain models
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Sverrisdóttir, Eva, Foster, David, Upton, Richard, Olesen, Anne Estrup, Lund, Trine Meldgaard, Christrup, Lona Louring, Kreilgaard, Mads, Sverrisdóttir, Eva, Foster, David, Upton, Richard, Olesen, Anne Estrup, Lund, Trine Meldgaard, Christrup, Lona Louring, and Kreilgaard, Mads
- Published
- 2013
113. Translational pain research: evaluating analgesic effect in experimental visceral pain models
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Olesen, Anne Estrup, Andresen, Trine, Christrup, Lona Louring, Upton, Richard N., Olesen, Anne Estrup, Andresen, Trine, Christrup, Lona Louring, and Upton, Richard N.
- Abstract
Udgivelsesdato: 2009-Jan-14, Deep visceral pain is frequent and presents major challenges in pain management, since its pathophysiology is still poorly understood. One way to optimize treatment of visceral pain is to improve knowledge of the mechanisms behind the pain and the mode of action of analgesic substances. This can be achieved through standardized experimental human pain models. Experimental pain models in healthy volunteers are advantageous for evaluation of analgesic action, as this is often difficult to assess in the clinic because of confounding factors such as sedation, nausea and general malaise. These pain models facilitate minimizing the gap between knowledge gained in animal and human clinical studies. Combining experimental pain studies and pharmacokinetic studies can improve understanding of the pharmacokinetic-pharmacodynamic relationship of analgesics and, thus, provide valuable insight into optimal clinical treatment of visceral pain. To improve treatment of visceral pain, it is important to study the underlying mechanisms of pain and the action of analgesics used for its treatment. An experimental pain model activates different modalities and can be used to investigate the mechanism of action of different analgesics in detail. In combination with pharmacokinetic studies and objective assessment such as electroencephalography, new information regarding a given drug substance and its effects can be obtained. Results from experimental human visceral pain research can bridge the gap in knowledge between animal studies and clinical condition in patients suffering from visceral pain, and thus constitute the missing link in translational pain research.
- Published
- 2009
114. Forskelle på ordinationsmønstret af analgetika ved behandling af cancersmerter på seks danske smertebehandlingsenheder
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Olesen, Anne Estrup, Jarvig, Line, Hansen, Ole Bo, Højsted, Jette, Jensen, Niels-Henrik, Jonsson, Torsten, Sjøgren, Per, Sonne, Nan Margrethe, Sørensen, Jacob Thorsted, Christrup, Lona L, Olesen, Anne Estrup, Jarvig, Line, Hansen, Ole Bo, Højsted, Jette, Jensen, Niels-Henrik, Jonsson, Torsten, Sjøgren, Per, Sonne, Nan Margrethe, Sørensen, Jacob Thorsted, and Christrup, Lona L
- Abstract
30-40% of cancer patients suffer from pain at diagnosis while 70-80% of patients at progressed stages of the disease suffer from pain. Background pain is treated with long-acting opioids. Breakthrough pain can be treated with shorter acting non-opioid analgesics or opioids. The aim of this study was to describe the medical treatment of pain in cancer patients in connection with six Danish hospital units with special expertise in pain treatment. Differences in the prescription of analgesics were studied. The study was performed as a cross section study of prescribed analgesics. Data was collected by reviewing medical records. The study included 347 patients. A total of 278 patients out of 347 were treated with opioids for background pains. A significant difference was found (P < 0.001) in the frequency of prescribing morphine, oxycodone and fentanyl. For the treatment of background pain secondary analgesics were prescribed for 40% of the patients while 50% of the patients were treated with paracetamol and/or NSAID. According to the medical records 79% of the patients were prescribed analgesics for breakthrough pain. 73% of the 347 patients had strong opioids prescribed for breakthrough pain. For the treatment of background pain opioids were prescribed for the majority of the cancer patients. Morphine and oxycodone were prescribed most frequently. Secondary analgesics and paracetamol and/or NSAID were also prescribed for background pain. The strong opioids were prescribed for the treatment of breakthrough pain. Differences in the prescription of analgesics between the six hospital units were observed in this study.
- Published
- 2007
115. Gender, Variation in Opioid Receptor Genes and Sensitivity to Experimental Pain
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Sato, Hiroe, primary, Droney, Joanne, additional, Ross, Joy, additional, Olesen, Anne Estrup, additional, Staahl, Camilla, additional, Andresen, Trine, additional, Branford, Ruth, additional, Riley, Julia, additional, Arendt-Nielsen, Lars, additional, and Drewes, Asbjørn Mohr, additional
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- 2013
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116. Pharmacological challenges in chronic pancreatitis
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Olesen, Anne Estrup, primary
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- 2013
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117. Advanced Pharmaco-EEG Reveals Morphine Induced Changes in the Brain's Pain Network
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Lelic, Dina, primary, Olesen, Anne Estrup, additional, Brock, Christina, additional, Staahl, Camilla, additional, and Drewes, Asbjørn Mohr, additional
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- 2012
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118. Translational pain research: Evaluating analgesic effect in experimental visceral pain models
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Olesen, Anne Estrup, primary, Andresen, Trine, additional, Christrup, Lona Louring, additional, and Upton, Richard N, additional
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- 2009
- Full Text
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119. Clinical potential of naloxegol in the management of opioid-induced bowel dysfunction.
- Author
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Poulsen, Jakob Lykke, Brock, Christina, Olesen, Anne Estrup, Nilsson, Matias, and Drewes, Asbjørn Mohr
- Subjects
INTESTINAL disease treatment ,DRUG therapy ,OPIOIDS ,ANALGESIA ,SYMPTOMS ,DRUG administration ,CLINICAL drug trials - Abstract
Opioid-induced bowel dysfunction (OIBD) is a burdensome condition which limits the therapeutic benefit of analgesia. It affects the entire gastrointestinal tract, pre-dominantly by activating opioid receptors in the enteric nervous system, resulting in a wide range of symptoms, such as reflux, bloating, abdominal cramping, hard, dry stools, and incomplete evacuation. The majority of studies evaluating OIBD focus on constipation experienced in approximately 60% of patients. Nevertheless, other presentations of OIBD seem to be equally frequent. Furthermore, laxative treatment is often insufficient, which in many patients results in decreased quality of life and discontinuation of opioid treatment. Novel mechanism-based pharmacological approaches targeting the gastrointestinal opioid receptors have been marketed recently and even more are in the pipeline. One strategy is prolonged release formulation of the opioid antagonist naloxone (which has limited systemic absorption) and oxycodone in a combined tablet. Another approach is peripherally acting, -opioid receptor antagonists (PAMORAs) that selectively target -opioid receptors in the gastrointestinal tract. However, in Europe the only PAMORA approved for OIBD is the subcu-taneously administered methylnaltrexone. Alvimopan is an oral PAMORA, but only approved in the US for postoperative ileus in hospitalized patients. Finally, naloxegol is a novel, oral PAMORA expected to be approved soon. In this review, the prevalence and pathophysiology of OIBD is presented. As PAMORAs seem to be a promising approach, their potential effect is reviewed with special focus on naloxegol's pharmacological properties, data on safety, efficacy, and patient-focused perspectives. In conclusion, as naloxegol is administered orally once daily, has proven efficacious compared to placebo, has an acceptable safety profile, and can be used as add-on to existing pain treatment, it is a welcoming addition to the targeted treatment possibilities for OIBD. [ABSTRACT FROM AUTHOR]
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- 2014
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- View/download PDF
120. Cingulate metabolites during pain and morphine treatment as assessed by magnetic resonance spectroscopy.
- Author
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Hansen, Tine Maria, Olesen, Anne Estrup, Simonsen, Carsten Wiberg, Drewes, Asbjørn Mohr, and Frøkjær, Jens Brøndum
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METABOLITE analysis ,MAGNETIC resonance imaging of the brain ,PAIN management ,MORPHINE ,RANDOMIZED controlled trials ,PROTON magnetic resonance spectroscopy ,CROSSOVER trials - Abstract
Background: Experimental investigation of cerebral mechanisms underlying pain and analgesia are important in the development of methods for diagnosis and treatment of pain. The aim of the current study was to explore brain metabolites in response to pain and treatment with morphine. Methods: Proton magnetic resonance spectroscopy of the anterior cingulate cortex was performed in 20 healthy volunteers (13 males and seven females, aged 24.9±2.6 years) during rest and acute pain before and during treatment with 30 mg of oral morphine or placebo in a randomized, double-blinded, cross-over study design. Pain was evoked by skin stimulation applied to the right upper leg using a contact heat-evoked potential stimulator. Results: Data from 12 subjects were valid for analysis. Painful stimulation induced an increase in N-acetylaspartate/creatine compared with rest (F=5.5, P=0.04). During treatment with morphine, painful stimulation induced decreased glutamate/creatine (F=7.3, P=0.02), myo-inositol/creatine (F=8.38, P=0.02), and N-acetylaspartate/creatine (F=13.8, P=0.004) concentrations, whereas an increase in the pain-evoked N-acetylaspartate/creatine concentration (F=6.1, P=0.04) was seen during treatment with placebo. Conclusion: This explorative study indicates that neuronal metabolites in the anterior cingulate cortex, such as N-acetylaspartate, glutamate, and myo-inositol, could be related to the physiology of pain and treatment with morphine. This experimental method has the potential to enable the study of brain metabolites involved in pain and its treatment, and may in the future be used to provide further insight into these mechanisms. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
121. Patient and Disease Characteristics Associate With Sensory Testing Results in Chronic Pancreatitis.
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Kuhlmann, Louise, Olesen, Søren Schou, Grønlund, Debbie, Olesen, Anne Estrup, Phillips, Anna Evans, Faghih, Mahya, Drewes, Asbjørn Mohr, Olesen, Søren S, Olesen, Anne E, Phillips, Anna E, and Drewes, Asbjørn M
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- 2019
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122. Pharmacokinetic metamodel of morphine and morphine-6-glucuronide in neonates and adults
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PAGE 2016: Population Approach Group Europe Lisboa, Portugal 7-10 June 2016, Sverrisdóttir, Eva, Foster, David John Richard, Olesen, Anne Estrup, Lund, Trine Meldgaard, Drewes, Asbjørn Mohr, Christrup, Lona Louring, Kreilgaard, Mads, and Upton, Richard Neil
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adults ,morphine ,pharmacokinetics ,neonates - Abstract
Objectives: Morphine is the gold standard opioid to treat moderate to severe pain. Morphine-6-glucuronide (M6G) is an active metabolite and contributes to the effect of morphine [1]. The pharmacokinetics (PK) of morphine and M6G are associated with large inter-individual variability, which makes optimal dose selection challenging, especially in populations such as neonates and patients with renal impairment [2]. The aims of this study were to develop a combined morphine and M6G PK metamodel in neonates and adults, identify covariates that explain some of the large variability, and describe the formation of M6G after administration of morphine through different routes. Methods: Morphine and M6G data from 22 studies in diverse populations were fitted to PK models using NONMEM 7.3 [3]. Morphine was administered through the intravenous, oral, intramuscular, rectal, and subcutaneous route. M6G was administered intravenously in four studies, and metabolite M6G concentrations were available in 15 studies. Study populations included healthy volunteers, preterm neonates, and patients with renal impairment. Model development of the combined PK metamodel consisted of three stages. First, morphine concentration-time data was fitted to PK models and optimised regarding random effects and covariates. Second, M6G data was included in the model and the M6G PK model was developed, with the morphine model fixed. Lastly, the formation of M6G after administration of morphine was estimated and covariates were tested for the M6G model. Results: Morphine and M6G PK were described with two-compartment PK models. Absorption of morphine after oral, rectal, and subcutaneous administration was described with transit compartment absorption models. A sigmoidal maturation model defined as a function of postmenstrual age described the maturation of morphine clearance in neonates. In adults, morphine clearance was shown to decrease with age. M6G formation constituted 17% of morphine clearance. In addition, 26% of an oral or rectal dose was formed to M6G (first-pass metabolism). Creatinine clearance was included as a covariate for M6G clearance. Conclusions: Some of the large inter-individual variability in morphine and M6G PK was explained with weight, age, creatinine clearance, and postmenstrual age. The formation of M6G was described after administration of morphine, with additional first-pass metabolism for the oral and rectal route.
- Published
- 2016
123. Translational pain research:evaluating analgesic effect in experimental visceral pain models
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Trine Andresen, Lona L. Christrup, Richard N. Upton, Anne Estrup Olesen, Olesen, Anne Estrup, Andresen, Trine, Christrup, Lona Louring, and Upton, Richard N
- Subjects
Analgesic effect ,medicine.medical_specialty ,Nausea ,Sedation ,Guidelines Clinical Practice ,Analgesic ,Pain ,Models, Biological ,Receptors, N-Methyl-D-Aspartate ,pharmacodynamics ,medicine ,Animals ,Humans ,Intensive care medicine ,Analgesics ,Modalities ,business.industry ,Gastroenterology ,Visceral pain ,General Medicine ,Antidepressive Agents ,Analgesics, Opioid ,Disease Models, Animal ,Action (philosophy) ,Anesthesia ,analgesics ,visceral pain ,Animal studies ,medicine.symptom ,business ,pharmacokinetics - Abstract
Deep visceral pain is frequent and presents major challenges in pain management, since its pathophysiology is still poorly understood. One way to optimize treatment of visceral pain is to improve knowledge of the mechanisms behind the pain and the mode of action of analgesic substances. This can be achieved through standardized experimental human pain models. Experimental pain models in healthy volunteers are advantageous for evaluation of analgesic action, as this is often difficult to assess in the clinic because of confounding factors such as sedation, nausea and general malaise. These pain models facilitate minimizing the gap between knowledge gained in animal and human clinical studies. Combining experimental pain studies and pharmacokinetic studies can improve understanding of the pharmacokinetic-pharmacodynamic relationship of analgesics and, thus, provide valuable insight into optimal clinical treatment of visceral pain. To improve treatment of visceral pain, it is important to study the underlying mechanisms of pain and the action of analgesics used for its treatment. An experimental pain model activates different modalities and can be used to investigate the mechanism of action of different analgesics in detail. In combination with pharmacokinetic studies and objective assessment such as electroencephalography, new information regarding a given drug substance and its effects can be obtained. Results from experimental human visceral pain research can bridge the gap in knowledge between animal studies and clinical condition in patients suffering from visceral pain, and thus constitute the missing link in translational pain research. Refereed/Peer-reviewed
- Published
- 2009
- Full Text
- View/download PDF
124. Potential medicine waste in the process of outpatients receiving cost-free medicines from medicine pick-up lockers in the North Denmark region.
- Author
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Routhe LG, Andersen IB, Eisenhardt MVG, Mejlholm MB, Wisby HB, and Olesen AE
- Abstract
Objectives: In the Danish healthcare system, restructuring is an ongoing process to accommodate the rising number of patients and to optimise resource allocation. To ease departmental burdens at hospitals in the North Denmark Region, outpatients are empowered to collect their cost-free medicines from medication pick-up lockers. The lockers function similarly to a package box, thereby enhancing patient freedom. Due to lack of evidence within the published literature regarding cost-free medicines and medicine waste, the aim of our study was to identify the common medications delivered to medicine pick-up lockers and secondly, to evaluate potential medicine waste., Methods: Data from ApoVision provided insights into medications delivered to medicine pick-up lockers from March to October 2023 in the North Denmark Region. To estimate unused medicines we obtained data on the number of medications returned from medicine pick-up lockers., Results: From 2020 to 2023, the number of patients receiving cost-free medicines at medication pick-up lockers increased. In total, approximately 30 000 packages of medicine were delivered to medicine pick-up lockers from March to October 2023 in the North Denmark Region; 1.7% were returned. Methotrexate, adalimumab, and omalizumab were among the most common deliveries and were also the three most returned from the medicine pick-up lockers., Conclusions: This study is an initial attempt to investigate potential medicine waste in cost-free medicines dispensed to outpatients via pick-up lockers. Antineoplastic and immunomodulating agents were the most common medicines delivered to medication pick-up lockers in the North Denmark Region from March to October 2023. In this period, approximately 2% of all delivered medicine packages were returned to the hospital pharmacy. Our analysis solely focuses on waste associated with medications left uncollected from medicine pick-up lockers. Addressing the impact of medicine waste in a hospital setting requires a comprehensive approach, thus future studies should also focus on other sites relevant for medication waste as, for example, the patient's household., Competing Interests: Competing interests: None declared., (© European Association of Hospital Pharmacists 2024. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2024
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125. Designing an Intervention to Improve Medication Safety for Nursing Home Residents Based on Experiential Knowledge Related to Patient Safety Culture at the Nursing Home Front Line: Cocreative Process Study.
- Author
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Juhl MH, Soerensen AL, Vardinghus-Nielsen H, Mortensen LS, Kolding Kristensen J, and Olesen AE
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- Humans, Focus Groups, Safety Management, Aged, Male, Female, Nursing Homes, Patient Safety, Medication Errors prevention & control
- Abstract
Background: Despite years of attention, avoiding medication-related harm remains a global challenge. Nursing homes provide essential health care for frail older individuals, who often experience multiple chronic diseases and polypharmacy, increasing their risk of medication errors. Evidence of effective interventions to improve medication safety in these settings is inconclusive. Focusing on patient safety culture is a potential key to intervention development as it forms the foundation for overall patient safety and is associated with medication errors., Objective: This study aims to develop an intervention to improve medication safety for nursing home residents through a cocreative process guided by integrated knowledge translation and experience-based codesign., Methods: This study used a cocreative process guided by integrated knowledge translation and experience-based co-design principles. Evidence on patient safety culture was used as an inspirational source for exploration of medication safety. Data collection involved semistructured focus groups to generate experiential knowledge (stage 1) to inform intervention design in a multidisciplinary workshop (stage 2). Research validation engaging different types of research expertise and municipal managerial representatives in finalizing the intervention design was essential. Acceptance of the final intervention for evaluation was aimed for through contextualization focused on partnership with a municipal advisory board. An abductive, rapid qualitative analytical approach to data analysis was chosen using elements from analyzing in the present, addressing the time-dependent, context-bound aspects of the cocreative process., Results: Experiential knowledge was represented by three main themes: (1) closed systems and gaps between functions, (2) resource interpretation and untapped potential, and (3) community of medication safety and surveillance. The main themes informed the design of preliminary intervention components in a multidisciplinary workshop. An intervention design process focused on research validation in addition to contextualization resulted in the Safe Medication in Nursing Home Residents (SAME) intervention covering (1) campaign material visualizing key roles and responsibilities regarding medication for nursing home residents and (2) "Medication safety reflexive spaces" focused on social and health care assistants., Conclusions: The cocreative process successfully resulted in the multifaceted SAME intervention, grounded in lived experiences shared by some of the most important (but often underrepresented in research) stakeholders: frontline health care professionals and representatives of nursing home residents. This study brought attention toward closed systems related to functions in medication management and surveillance, not only informing the SAME intervention design but as opportunities for further exploration in future research. Evaluation of the intervention is an important next step. Overall, this study represents an important contribution to the complex field of medication safety., International Registered Report Identifier (irrid): RR2-10.2196/43538., (©Marie Haase Juhl, Ann Lykkegaard Soerensen, Henrik Vardinghus-Nielsen, Lea Sinding Mortensen, Jette Kolding Kristensen, Anne Estrup Olesen. Originally published in JMIR Formative Research (https://formative.jmir.org), 09.10.2024.)
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- 2024
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126. Deprescribing as a Way to Reduce Inappropriate Use of Drugs for Overactive Bladder in Primary Care (DROP): Protocol for a Cluster Randomized Controlled Trial With an Embedded Explanatory Sequential Mixed Methods Study.
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Soerensen AL, Haase Juhl M, Krogh ML, Grønkjær M, Kristensen JK, and Olesen AE
- Subjects
- Humans, Aged, Female, Male, Inappropriate Prescribing prevention & control, Inappropriate Prescribing statistics & numerical data, Randomized Controlled Trials as Topic, Denmark, Urinary Bladder, Overactive drug therapy, Deprescriptions, Primary Health Care
- Abstract
Background: Potentially inappropriate medication remains a significant concern in general practices, particularly in the context of overactive bladder (OAB) treatment for individuals aged 65 years and older. This study focuses on the exploration of alternative options for treating OAB and the deprescribing of anticholinergic drugs commonly used in OAB. The research aims to comprehensively evaluate the efficiency of deprescribing through a mixed methods approach, combining quantitative assessment and qualitative exploration of perceptions, experiences, and potential barriers among patients and health care personnel., Objective: This study aims to evaluate the efficiency and safety of the intervention in which health care staff in primary care encourage patients to participate in deprescribing their drugs for OAB. In addition, we aim to identify factors contributing to or obstructing the deprescribing process that will drive more informed decisions in the field of deprescribing and support effective and safe treatment of patients., Methods: The drugs for overactive bladder in primary care (DROP) study uses a rigorous research design, using a randomized controlled trial (RCT) with an embedded sequential explanatory mixed methods approach. All general practices within the North Denmark Region will be paired based on the number of general practitioners (GPs) and urban or rural locations. The matched pairs will be randomized into intervention and control groups. The intervention group will receive an algorithm designed to guide the deprescribing of drugs for OAB, promoting appropriate medication use. Quantitative data will be collected from the RCT including data from Danish registries for prescription analysis. Qualitative data will be obtained through interviews and focus groups with GPs, staff members, and patients. Finally, the quantitative and qualitative findings are merged to understand deprescribing for OAB comprehensively. This integrated approach enhances insights and supports future intervention improvement., Results: The DROP study is currently in progress, with randomization of general practices underway. While they have not been invited to participate yet, they will be. The inclusion of GP practices is scheduled from December 2023 to April 2024. The follow-up period for each patient is 6 months. Results will be analyzed through an intention-to-treat analysis for the RCT and a thematic analysis for the qualitative component. Quantitative outcomes will focus on changes in prescriptions and symptoms, while the qualitative analysis will explore experiences and perceptions., Conclusions: The DROP study aims to provide an evidence-based intervention in primary care that ensures the deprescription of drugs for OAB when there is an unfavorable risk-benefit profile. The DROP study's contribution lies in generating evidence for deprescribing practices and influencing best practices in health care., Trial Registration: ClinicalTrials.gov NCT06110975; https://clinicaltrials.gov/study/NCT06110975., International Registered Report Identifier (irrid): DERR1-10.2196/56277., (©Ann Lykkegaard Soerensen, Marie Haase Juhl, Marlene Lunddal Krogh, Mette Grønkjær, Jette Kolding Kristensen, Anne Estrup Olesen. Originally published in JMIR Research Protocols (https://www.researchprotocols.org), 23.07.2024.)
- Published
- 2024
- Full Text
- View/download PDF
127. Safe Medication in Nursing Home Residents Through the Development and Evaluation of an Intervention (SAME): Protocol for a Fully Integrated Mixed Methods Study With a Cocreative Approach.
- Author
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Juhl MH, Soerensen AL, Kristensen JK, Johnsen SP, and Olesen AE
- Abstract
Background: Medication safety is increasingly challenging patient safety in growing aging populations. Developing positive patient safety cultures is acknowledged as a primary goal to improve patient safety, but evidence on the interventions to do so is inconclusive. Nursing home residents are often cognitively and physically impaired and are therefore highly reliant on frontline health care providers. Thus, interventions to improve medication safety of nursing home residents through patient safety culture among providers are needed. Using cocreative partnerships, integrating knowledge of residents and their relatives, and ensuring managerial support could be beneficial., Objective: The primary aim of the Safe Medication of Nursing Home Residents Through Development and Evaluation of an Intervention (SAME) study is to improve medication safety for nursing home residents through developing an intervention by gaining experiential knowledge of patient safety culture in cocreative partnerships, integrating knowledge of residents and their relatives, and ensuring managerial support., Methods: The fully integrated mixed method study will be conducted using an integrated knowledge translation approach. Patient safety culture within nursing homes will first be explored through qualitative focus groups (stage 1) including nursing home residents, their relatives, and frontline health care providers. This will inform the development of an intervention in a multidisciplinary panel (stage 2) including cocreators representing the medication management process across the health care system. Evaluation of the intervention will be done in a randomized controlled trial set at nursing homes (stage 3). The primary outcome will be changes in the mean scale score of an adapted version of the Danish "Safety Attitudes Questionnaire" (SAQ-DK) for use in nursing homes. Patient safety-related outcomes will be collected through Danish health registers to assess safety issues and effects, including medication, contacts to health care, diagnoses, and mortality. Finally, a mixed methods analysis on patient safety culture in nursing homes will be done (stage 4), integrating qualitative data (stage 1) and quantitative data (stage 3) to comprehensively understand patient safety culture as a key to medication safety., Results: The SAME study is ongoing. Focus groups were carried out from April 2021 to September 2021 and the workshop in September 2021. Baseline SAQ-DK data were collected in January 2022 with expected follow-up in January 2023. Final data analysis is expected in spring 2024., Conclusions: The SAME study will help not only to generate evidence on interventions to improve medication safety of nursing home residents through patient safety culture but also to give insight into possible impacts of using cocreativity to guide the development. Thus, findings will address multiple gaps in evidence to guide future patient safety improvement efforts within primary care settings of political and scientific scope., Trial Registration: ClinicalTrials.gov NCT04990986; https://clinicaltrials.gov/ct2/show/NCT04990986., International Registered Report Identifier (irrid): DERR1-10.2196/43538., (©Marie Haase Juhl, Ann Lykkegaard Soerensen, Jette Kolding Kristensen, Søren Paaske Johnsen, Anne Estrup Olesen. Originally published in JMIR Research Protocols (https://www.researchprotocols.org), 31.03.2023.)
- Published
- 2023
- Full Text
- View/download PDF
128. [Opioid dependency as complication after surgery].
- Author
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Uhrbrand P, Simoni AH, Olesen AE, Pedersen AB, Christiansen CF, and Nikolajsen L
- Subjects
- Analgesics, Opioid administration & dosage, Analgesics, Opioid adverse effects, Analgesics, Opioid therapeutic use, Drug Administration Schedule, Humans, Morphine administration & dosage, Morphine adverse effects, Morphine therapeutic use, Pain, Postoperative drug therapy, Risk Factors, Opioid-Related Disorders epidemiology, Opioid-Related Disorders etiology, Opioid-Related Disorders prevention & control, Postoperative Complications epidemiology, Postoperative Complications etiology, Postoperative Complications prevention & control
- Abstract
Patients are often prescribed opioids after hospital discharge for surgery. However, several studies have shown that at least 3% of preoperative opioid-naive patients continue to use opioids for a long time after surgery. Prolonged opioid use is associated with serious side effects such as physical and psychological dependence, cognitive disturbances and adverse effects on sex hormone balance. Prolonged opioid use should be avoided, if possible. In this review, we summarise the current knowledge of prolonged opioid use after surgery and propose several preventive measures.
- Published
- 2018
129. Study protocol for a randomised, double-blinded, placebo-controlled, clinical trial of S-ketamine for pain treatment in patients with chronic pancreatitis (RESET trial).
- Author
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Juel J, Olesen SS, Olesen AE, Poulsen JL, Dahan A, Wilder-Smith O, Madzak A, Frøkjær JB, and Drewes AM
- Subjects
- Administration, Oral, Analgesics administration & dosage, Analgesics, Opioid therapeutic use, Chronic Pain etiology, Double-Blind Method, Humans, Hyperalgesia etiology, Infusions, Intravenous, Ketamine administration & dosage, Pain Measurement, Receptors, N-Methyl-D-Aspartate antagonists & inhibitors, Research Design, Analgesics therapeutic use, Chronic Pain drug therapy, Hyperalgesia drug therapy, Ketamine therapeutic use, Pancreatitis, Chronic complications
- Abstract
Introduction: Chronic pancreatitis (CP) is an inflammatory disease that causes irreversible damage to pancreatic tissue. Pain is its most prominent symptom. In the absence of pathology suitable for endoscopic or surgical interventions, pain treatment usually includes opioids. However, opioids often have limited efficacy. Moreover, side effects are common and bothersome. Hence, novel approaches to control pain associated with CP are highly desirable. Sensitisation of the central nervous system is reported to play a key role in pain generation and chronification. Fundamental to the process of central sensitisation is abnormal activation of the N-methyl-D-aspartate receptor, which can be antagonised by S-ketamine. The RESET trial is investigating the analgaesic and antihyperalgesic effect of S-ketamine in patients with CP., Methods and Analysis: 40 patients with CP will be enrolled. Patients are randomised to receive 8 h of intravenous S-ketamine followed by oral S-ketamine, or matching placebo, for 4 weeks. To improve blinding, 1 mg of midazolam will be added to active and placebo treatment. The primary end point is clinical pain relief as assessed by a daily pain diary. Secondary end points include changes in patient-reported outcome measures, opioid consumption and rates of side effects. The end points are registered through the 4-week medication period and for an additional follow-up period of 8 weeks to investigate long-term effects. In addition, experimental pain measures also serves as secondary end points, and neurophysiological imaging parameters are collected. Furthermore, experimental baseline recordings are compared to recordings from a group of healthy controls to evaluate general aspects of pain processing in CP., Ethics and Dissemination: The protocol is approved by the North Denmark Region Committee on Health Research Ethics (N-20130040) and the Danish Health and Medicines Authorities (EudraCT number: 2013-003357-17). The results will be disseminated in peer-reviewed journals and at scientific conferences., Trial Registration Number: The study is registered at http://www.clinicaltrialsregister.eu (EudraCT number 2013-003357-17)., (Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.)
- Published
- 2015
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130. [Differences in the prescription of analgesics in the treatment of cancer pain in six Danish pain treatment units].
- Author
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Olesen AE, Jarvig L, Hansen OB, Højsted J, Jensen NH, Jonsson T, Sjøgren P, Sonne NM, Sørensen JT, and Christrup LL
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Cross-Sectional Studies, Denmark, Drug Utilization Review, Female, Humans, Male, Middle Aged, Neoplasms complications, Pain etiology, Pain Clinics, Practice Patterns, Physicians', Analgesics, Non-Narcotic administration & dosage, Analgesics, Opioid administration & dosage, Drug Prescriptions statistics & numerical data, Neoplasms drug therapy, Pain drug therapy
- Abstract
30-40% of cancer patients suffer from pain at diagnosis while 70-80% of patients at progressed stages of the disease suffer from pain. Background pain is treated with long-acting opioids. Breakthrough pain can be treated with shorter acting non-opioid analgesics or opioids. The aim of this study was to describe the medical treatment of pain in cancer patients in connection with six Danish hospital units with special expertise in pain treatment. Differences in the prescription of analgesics were studied. The study was performed as a cross section study of prescribed analgesics. Data was collected by reviewing medical records. The study included 347 patients. A total of 278 patients out of 347 were treated with opioids for background pains. A significant difference was found (P < 0.001) in the frequency of prescribing morphine, oxycodone and fentanyl. For the treatment of background pain secondary analgesics were prescribed for 40% of the patients while 50% of the patients were treated with paracetamol and/or NSAID. According to the medical records 79% of the patients were prescribed analgesics for breakthrough pain. 73% of the 347 patients had strong opioids prescribed for breakthrough pain. For the treatment of background pain opioids were prescribed for the majority of the cancer patients. Morphine and oxycodone were prescribed most frequently. Secondary analgesics and paracetamol and/or NSAID were also prescribed for background pain. The strong opioids were prescribed for the treatment of breakthrough pain. Differences in the prescription of analgesics between the six hospital units were observed in this study.
- Published
- 2007
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