20 results on '"Webb DE"'
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2. Anterior skull base reconstruction: a review of current techniques.
- Author
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Schmalbach CE, Webb DE, and Weitzel EK
- Published
- 2010
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3. Synthetic temperature profiles derived from Geosat altimetry: Comparison with air-dropped expendable bathythermograph profiles
- Author
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Jim L. Mitchell, Michael R. Carnes, and P. Webb de Witt
- Subjects
Dynamic height ,Atmospheric Science ,Ecology ,Temperature salinity diagrams ,Paleontology ,Soil Science ,Forestry ,Empirical orthogonal functions ,Aquatic Science ,Oceanography ,Geodesy ,Gulf Stream ,Geophysics ,Space and Planetary Science ,Geochemistry and Petrology ,Geoid ,Earth and Planetary Sciences (miscellaneous) ,Altimeter ,Bathythermograph ,Thermocline ,Geology ,Earth-Surface Processes ,Water Science and Technology - Abstract
Synthetic temperature profiles are computed from altimeter-derived sea surface heights in the Gulf Stream region. The required relationships between surface height (dynamic height at the surface relative to 1000 dbar) and subsurface temperature are provided from regression relationships between dynamic height and amplitudes of empirical orthogonal functions (EOFs) of the vertical structure of temperature derived by de Witt (1987). Relationships were derived for each month of the year from historical temperature and salinity profiles from the region surrounding the Gulf Stream northeast of Cape Hatteras. Sea surface heights are derived using two different geoid estimates, the feature-modeled geoid and the air-dropped expendable bathythermograph (AXBT) geoid, both described by Carnes et al. (1990). The accuracy of the synthetic profiles is assessed by comparison to 21 AXBT profile sections which were taken during three surveys along 12 Geosat ERM ground tracks nearly contemporaneously with Geosat overflights. The primary error statistic considered is the root-mean-square (rms) difference between AXBT and synthetic isotherm depths. The two sources of error are the EOF relationship and the altimeter-derived surface heights. EOF-related and surface height-related errors in synthetic temperature isotherm depth are of comparable magnitude; each translates into about a 60-m rms isotherm depth error, or a combined 80 m to 90 m error for isotherms in the permanent thermocline. EOF-related errors are responsible for the absence of the near-surface warm core of the Gulf Stream and for the reduced volume of Eighteen Degree Water in the upper few hundred meters of (apparently older) cold-core rings in the synthetic profiles. The overall rms difference between surface heights derived from the altimeter and those computed from AXBT profiles is 0.15 dyn m when the feature-modeled geoid is used and 0.19 dyn m when the AXBT geoid is used; the portion attributable to altimeter-derived surface height errors alone is 0.03 dyn m less for each. In most cases, the deeper structure of the Gulf Stream and eddies is reproduced well by vertical sections of synthetic temperature, with largest errors typically in regions of high horizontal gradient such as across rings and the Gulf Stream front.
- Published
- 1990
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4. Amounts of Tennessee Extension staff time planned and expended and clientele contacts with selected audiences and teaching methods, fiscal years 1972 and 1975, and possible implications for 1970 statewide extension swine production practice checklist survey and educational program
- Author
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Webb, De Wayne Lee
- Abstract
Information from the 1970 and 1975 Tennessee Swine Production Practice Checklist Surveys was studied together with data from the Tennessee Extension Management Information System, TEMIS, (i.e., agent days planned and expended and clientele contacts made) for Fiscal Years 1972 and 1975 to determine whether there were possible implications for the survey and Extension's educational program. The classification of swine survey practices and TEMIS primary subjects was assumed to be acceptable for this study. Data were considered for Extension districts and teaching methods. From the 1975 Tennessee Swine Production Survey, it was found that the producer reported state average weaning (8 weeks) weight, for 527 producers randomly interviewed regarding Tennessee swine, was 40 pounds per pig. Recommended practices under Primary TEMIS Subject One, "Swine Records"; Subject Two, "Swine Pests"; Subject Three, "Swine Housing and Structures"; and Subject Four, "Swine Management"; were all used by less than 60 percent of the producers interviewed, based on 1970 data. This suggested the need to emphasize them more in Extension's swine educational program as priority or weaker areas. Recommended practices under Primary TEMIS Subject Five, "Swine Feeding and Nutrition"; and Subject Six, "Swine Breeding and Production", were used by more than 60 percent of the producers interviewed based on 1970 data. There were decreases in total agent days planned, total agent days expended and total clientele contacts made on swine subjects between FY 1972 and FY 1975. Of Extension methods studied, increases in numbers and percents of agent days expended for swine Extension work varied from district to district but were greatest for Individual Teaching Methods; while the largest decrease occurred for Mass Media. Trends in numbers and percents of clientele contacts made also varied from district to district, but the greatest increase occurred in Group Teaching Methods, with the greatest decrease occurring in All Other Teaching Methods. Indications were that the findings of the 1970 TSPCS were not reflected in the planning of future swine educational programs. Further study would be necessary, however, to determine if other factors, not identified in this study, influenced the manner in which agent time was planned and expended. Recommendations were included.
- Published
- 1977
5. Accountability needed.
- Author
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Webb DE
- Published
- 2009
6. Use of Decision Support for Improved Knowledge, Values Clarification, and Informed Choice in Patients With Rheumatoid Arthritis.
- Author
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Fraenkel L, Matzko CK, Webb DE, Oppermann B, Charpentier P, Peters E, Reyna V, and Newman ED
- Subjects
- Adult, Aged, Female, Humans, Male, Middle Aged, Pilot Projects, Single-Blind Method, Arthritis, Rheumatoid diagnosis, Arthritis, Rheumatoid therapy, Choice Behavior, Decision Support Techniques, Health Knowledge, Attitudes, Practice, Patient Participation statistics & numerical data
- Abstract
Objective: To examine the potential value of a theory-based, interactive decision support tool in clinical practice for patients with rheumatoid arthritis who are candidates for biologic agents., Methods: We conducted an 8-week, 2-arm, parallel, single-blind pilot trial in which candidates for treatment escalation with a biologic agent were randomized to receive either a link to a web-based tool or usual care. Outcomes included changes in objective knowledge, subjective knowledge, values clarification, and satisfaction with risk communication as well as the proportion of subjects defined as making an informed choice to escalate care at 2 weeks., Results: A total of 125 subjects were randomized. Significant between-group differences at 2 weeks favoring the intervention group were seen for changes in objective knowledge, subjective knowledge, and values clarification. No significant between-group differences were found in subjects' satisfaction with risk communication. Among those deciding to escalate care, a greater percentage met the criteria for an informed choice at 2 weeks in the intervention group compared to the control group (32% versus 13%; P = 0.02). Improvements in subjective knowledge and values clarification persisted at 8 weeks. There were no between-group differences in objective knowledge at 8 weeks., Conclusion: In this study, use of a decision support tool at the time of decision-making resulted in improved objective and subjective knowledge, as well as values clarity, compared to usual care. Not all improvements were sustained, emphasizing the need to offer educational support should additional escalation of care be required over the course of the illness., (© 2015, American College of Rheumatology.)
- Published
- 2015
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7. Soft tissue tumors of the neck.
- Author
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Webb DE and Ward BB
- Subjects
- Biopsy, Diagnosis, Differential, Diagnostic Imaging, Humans, Head and Neck Neoplasms diagnosis, Head and Neck Neoplasms surgery, Soft Tissue Neoplasms diagnosis, Soft Tissue Neoplasms surgery
- Published
- 2015
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8. Neck infections.
- Author
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Feldt BA and Webb DE
- Subjects
- Humans, Medical History Taking, Physical Examination, Risk Factors, Infections diagnosis, Infections microbiology, Infections therapy, Neck
- Published
- 2015
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9. Diagnosis and management of neck masses.
- Author
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Webb DE
- Subjects
- Disease Management, Humans, Head and Neck Neoplasms diagnosis, Head and Neck Neoplasms surgery, Oral Surgical Procedures
- Published
- 2015
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10. Vascular anomalies of the neck.
- Author
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Webb DE, McDermott J, and Gover D
- Subjects
- Diagnostic Imaging, Embolization, Therapeutic, Humans, Vascular Malformations classification, Vascular Neoplasms classification, Neck blood supply, Vascular Malformations diagnosis, Vascular Malformations surgery, Vascular Neoplasms diagnosis, Vascular Neoplasms surgery, Vascular Surgical Procedures
- Published
- 2015
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11. A case of small-bowel obstruction secondary to inadvertent ingestion of impression material.
- Author
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Murphy JP, Webb DE, and Hutchison RA
- Subjects
- Aged, Emergency Service, Hospital, Foreign Bodies diagnostic imaging, Foreign Bodies surgery, Humans, Intestinal Obstruction diagnostic imaging, Intestinal Obstruction surgery, Male, Radiography, Sulfides adverse effects, Dental Impression Materials adverse effects, Foreign Bodies etiology, Intestinal Obstruction etiology
- Abstract
Background: Small-bowel obstruction (SBO) is responsible for approximately 12 to 16 percent of surgical hospital admissions and more than 300,000 operations annually in the United States. This has resulted in more than $2.3 billion in health care delivery per year. SBO is a serious complication, carrying a 10 percent risk of mortality., Case Description: The authors report a case of SBO resulting from inadvertent ingestion of polysulfide impression material. A 74-year-old man visited the emergency department with diffuse, nonradiating, colicky periumbilical pain. The patient was admitted to the general surgery service of the hospital, and after four days of supportive therapy without evidence of progression of the foreign body, he underwent an exploratory laparotomy. The authors later identified the foreign body as polysulfide impression material., Practical Implications: SBO is a rare but significant complication that can result from a procedure that clinicians perform on a routine basis. Dentists should consider this complication whenever they are concerned that a high-risk patient may have ingested dental materials.
- Published
- 2013
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12. The diagnosis and management of parotid disease.
- Author
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Carlson ER and Webb DE
- Subjects
- Biopsy, Fine-Needle methods, Delayed Diagnosis, Diagnosis, Differential, Diagnostic Imaging methods, Humans, Neck Dissection, Parotid Diseases surgery, Parotid Neoplasms pathology, Parotid Neoplasms surgery, Risk Factors, Parotid Diseases diagnosis, Parotid Neoplasms diagnosis
- Abstract
A specific and regimented approach to the diagnosis and management of patients with disease of the parotid gland is necessary for correct diagnosis and management. Patient morbidity or mortality may result if there is a delay in the diagnosis of a malignant parotid tumor. This article reviews the diagnosis and management of parotid disease, with a particular concentration on neoplastic processes. An overview of the superficial parotid mass is emphasized because most neoplastic processes occupy the superficial lobe of the parotid gland., (Copyright © 2013 Elsevier Inc. All rights reserved.)
- Published
- 2013
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13. Pharyngeal perforation masquerading as esophageal atresia.
- Author
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Knight RB, Webb DE, and P Coppola C
- Subjects
- Bronchoscopy, Diagnosis, Differential, Diagnostic Errors, Esophageal Atresia diagnostic imaging, Esophagoscopy, Female, Fluoroscopy, Humans, Iatrogenic Disease, Infant, Newborn, Intestinal Perforation diagnostic imaging, Intubation, Gastrointestinal methods, Pharynx diagnostic imaging, Thoracotomy, Tracheoesophageal Fistula diagnostic imaging, Wounds, Penetrating diagnostic imaging, Esophageal Atresia diagnosis, Intestinal Perforation diagnosis, Intubation, Gastrointestinal adverse effects, Pharynx injuries, Tracheoesophageal Fistula diagnosis, Wounds, Penetrating diagnosis, Wounds, Penetrating etiology
- Abstract
We present a case of pharyngeal perforation from a nasogastric tube mistakenly diagnosed as esophageal atresia with tracheoesophageal fistula in a full term infant female. The correct diagnosis was identified with rigid bronchoscopy and esophagoscopy immediately prior to the planned thoracotomy which was aborted. After one week of oral restriction and antibiotics, the healed perforation did not demonstrate leakage on a contrasted pharyngoesophagogram and bottle feeds were initiated. The infant was discharged to home on day of life 13 without any further complications.
- Published
- 2009
- Full Text
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14. Unconscious cathexis of dream symbols as measured by the Kahn Test of Symbol Arrangement.
- Author
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Webb DE and Craddick RA
- Subjects
- Adult, Ego, Female, Humans, Male, Object Attachment, Orientation, Pattern Recognition, Visual, Psychoanalytic Interpretation, Recurrence, Cathexis, Dreams, Projective Techniques statistics & numerical data, Symbolism, Unconscious, Psychology
- Abstract
This study measured unconscious cathexis and conscious association with dream content, using the Kahn Test of Symbol Arrangement (KTSA), with subjects reporting recurring, past-recurring, and nonrecurring dreams. Unconscious cathexis of dream content was noted for recurring dreamers; conscious association with dream content was not. The results suggest that the KTSA is a valuable instrument for the empirical study of unconscious processes and that the contents of recurring dreams are particularly salient in a dreamer's unconscious.
- Published
- 1993
- Full Text
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15. The impact of dream interpretation using psychological kinesiology on the frequency of recurring dreams.
- Author
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Webb DE Jr and Fagan J
- Subjects
- Adolescent, Adult, Analysis of Variance, Female, Humans, Male, Movement, Muscles physiology, Stress, Psychological psychology, Dreams psychology, Psychoanalytic Interpretation
- Abstract
Subjects reporting a recurring dream at least 4 times a month for a year or more were assigned to a dream recording control group and an experimental group which used muscle testing to guide dream interpretation. Dream frequency was recorded prior to and following a dream interpretation intervention (experimental subjects) or dream reporting session (control subjects). Dream frequency declined in the experimental group, suggesting that recurring dream frequency is a useful dependent variable, and that psychological kinesiology dream interpretation is a powerful intervention.
- Published
- 1993
- Full Text
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16. Metabolic and renal effects of interleukin-2 immunotherapy for metastatic cancer.
- Author
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Webb DE, Austin HA 3rd, Belldegrun A, Vaughan E, Linehan WM, and Rosenberg SA
- Subjects
- Carcinoma, Renal Cell therapy, Humans, Interleukin-2 therapeutic use, Lymphokines, Middle Aged, Natriuresis, Phosphates blood, Recombinant Proteins adverse effects, Recombinant Proteins therapeutic use, Acute Kidney Injury etiology, Carcinoma, Renal Cell secondary, Hypotension etiology, Immunotherapy adverse effects, Interleukin-2 adverse effects, Kidney Neoplasms therapy, Killer Cells, Natural, Uremia etiology
- Abstract
The systemic administration of recombinant interleukin-2 (IL-2) either alone or in combination with lymphokine activated killer cells is a new approach to the immunotherapy of metastatic cancer in man. Renal toxicity is often a dose-limiting side effect of IL-2 administration. This prospective study of 17 consecutive patients receiving parenteral high dose IL-2 documents a reversible syndrome of hypotension, oliguria, fluid retention, azotemia and very low urinary excretion of sodium (median FeNa of 0.04%). The median nadir urinary uric acid to urinary creatinine ratio during IL-2 therapy was 0.2. This IL-2 regimen induces a reversible renal hypoperfusion syndrome (pre-renal azotemia) without evidence of acute uric acid nephropathy. Hypophosphatemia [median serum phosphorus of 1.9 mg/dl (0.61 mmol/l)] prompted further study of tubular function. Urinary excretions of phosphorus, calcium and magnesium were very low. Arterial blood gases revealed hyperventilation without alkalemia. The hypophosphatemia probably reflects increased utilization of inorganic phosphorus by rapidly proliferating lymphoid cells.
- Published
- 1988
17. Renal toxicity of interleukin-2 administration in patients with metastatic renal cell cancer: effect of pre-therapy nephrectomy.
- Author
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Belldegrun A, Webb DE, Austin HA 3rd, Steinberg SM, Linehan WM, and Rosenberg SA
- Subjects
- Creatinine blood, Female, Humans, Interleukin-2 therapeutic use, Killer Cells, Natural transplantation, Lymphokines immunology, Male, Recombinant Proteins adverse effects, Recombinant Proteins therapeutic use, Risk Factors, Carcinoma, Renal Cell therapy, Immunization, Passive, Interleukin-2 adverse effects, Kidney physiopathology, Kidney Neoplasms therapy, Nephrectomy
- Abstract
Systemic administration of interleukin-2 and lymphokine-activated killer cells is a new approach to the immunotherapy of advanced cancer. Metastatic renal cell cancer is one of the histological types of tumors particularly susceptible to this treatment approach although renal toxicity often is a dose-limiting side effect. We compared the renal functional changes observed during interleukin-2 therapy in 52 consecutive patients with advanced renal cancer to that of 83 consecutive patients with metastatic nonrenal cancer. Of the 52 patients with renal cancer 41 had recently undergone nephrectomy. The over-all peak serum creatinine values and the percentage increase of serum creatinine over baseline for all patients studied were significantly higher in cycle 2 of interleukin-2 therapy than in cycle 1: 3.8 +/- 0.2 versus 2.6 +/- 0.1 mg. per dl. and 241.7 +/- 16.5 versus 140.3 +/- 11.0 per cent, respectively. In patients with pre-therapy serum creatinine values of 0.4 to 0.9 mg. per dl. there were no significant differences in the mean peak serum creatinine nor in the percentage increase over baseline between renal and nonrenal cancer patients during cycle 1. In cycle 2 of therapy these values were higher in the renal cancer group (3.6 +/- 0.8 versus 2.4 +/- 0.2 mg. per dl. and 310.4 +/- 103.5 versus 214 +/- 30.4 per cent, respectively) but they did not reach statistical significance (P2 = 0.08 and 0.25, respectively). Renal and nonrenal cancer patients with pre-therapy serum creatinine levels of 1.0 to 1.4 mg. per dl. achieved similar high values in cycle 2 of interleukin-2 therapy (3.9 +/- 0.3 versus 3.9 +/- 0.4 mg. per dl. and 222.7 +/- 23.2 versus 248.7 +/- 33.5 per cent, respectively), although the initial increase (cycle 1) was higher in the renal cancer patients (3.3 +/- 0.3 versus 2.4 +/- 0.2 mg. per dl. and 172.3 +/- 25.9 versus 116.1 +/- 18.0 per cent, respectively). Baseline serum creatinine greater than or equal to 1.5 mg. per dl. was associated with an over-all higher peak serum creatinine and higher percentage increase of serum creatinine over baseline than that below 1.5 mg. per dl. baseline: 4.4 mg.per dl. and 171.1 +/- 36.3 per cent in cycle 1 and 6.5 +/- 0.7 mg. per dl. and 296.1 +/- 44.0 per cent in cycle 2, respectively (p less than 0.01). There was no association between peak serum creatinine and interval from nephrectomy to interleukin-2 therapy.(ABSTRACT TRUNCATED AT 400 WORDS)
- Published
- 1989
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18. Effects of interleukin-2 on renal function in patients receiving immunotherapy for advanced cancer.
- Author
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Belldegrun A, Webb DE, Austin HA 3rd, Steinberg SM, White DE, Linehan WM, and Rosenberg SA
- Subjects
- Adolescent, Adult, Aged, Creatinine blood, Female, Humans, Interleukin-2 therapeutic use, Kidney Function Tests, Killer Cells, Natural immunology, Lymphokines, Male, Middle Aged, Prospective Studies, Recombinant Proteins adverse effects, Recombinant Proteins therapeutic use, Risk, Interleukin-2 adverse effects, Kidney drug effects, Neoplasms therapy
- Abstract
Adoptive transfer of autologous lymphokine-activated killer cells in conjunction with recombinant interleukin-2 in patients with advanced cancer has produced significant regression of metastatic disease in selected patients. We analyzed the effects of interleukin-2 regimens on renal function in 99 consecutive patients. Interleukin-2 therapy with or without lymphokine-activated killer cells was associated with varying degrees of hypotension, fluid retention, azotemia, oliguria, and low fractional sodium excretion. After the patients completed the interleukin-2 regimens, their renal function improved promptly. Renal function values returned to baseline levels within 7 days in 62% of patients, within 14 days in 84%, and within 30 days in 95%. Pretherapy serum creatinine values above 1.4 mg/dL predicted the severity of azotemia and prolonged duration of renal functional recovery, interleukin-2 therapeutic regimens induce prerenal azotemia. Careful selection of patients and early detection of adverse physiologic changes may alleviate the side effects of interleukin-2 therapy.
- Published
- 1987
- Full Text
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19. Dependence of proximal tubule p-aminohippurate secretion on serum proteins and metabolic substrates.
- Author
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Webb DE, Edwards RM, and Grantham JJ
- Subjects
- Animals, Female, In Vitro Techniques, Osmolar Concentration, Perfusion, Probenecid pharmacology, Rabbits blood, Aminohippuric Acids metabolism, Blood Proteins physiology, Kidney Tubules, Proximal metabolism, p-Aminohippuric Acid metabolism
- Abstract
Renal proximal tubules secrete p-aminohippurate (PAH) and other endogenous anionic metabolites into the urine. The extent to which organic anion excretion is regulated is unknown, but recent studies indicate that peritubular serum proteins may have a role. We determined the relative effects of serum proteins and metabolic substrates (citrate, lactate, and alanine) on net PAH secretion in isolated perfused rabbit S2 proximal tubules. Net PAH secretion was calculated from the bath-to-lumen flux of [3H]PAH and the isotope specific activity. We corrected the flux for the important difference in PAH binding between rabbit serum proteins and bovine serum albumin (BSA); rabbit serum proteins (5.7 g/dl) and BSA (6 g/dl) bound 10 microM PAH 21 and 37%, respectively. BSA had no effect, but rabbit serum proteins reversibly inhibited PAH secretion in the presence of metabolic substrates in the bath (40.8%), the perfusate (42.6%), and both media (31.5%). In the absence of metabolic substrates, rabbit serum proteins decreased PAH secretion by only 16.8%. PAH secretion was inhibited by 1 g/dl rabbit serum proteins as effectively as 5.7 g/dl (30.3 and 31.5%, respectively), indicating that PAH transport is very sensitive to inhibition by rabbit serum proteins. In the absence of rabbit serum proteins, metabolic substrates in the bath had no effect on PAH secretion. We conclude that rabbit serum proteins inhibit basolateral membrane transport of PAH in proximal tubules. Inhibition by serum proteins is enhanced by bath or lumen citrate, alanine, and lactate, suggesting that peritubular plasma proteins and tubule cell metabolism may interact to modulate proximal tubule organic anion secretion and urinary excretion.
- Published
- 1986
- Full Text
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20. Acyclovir-induced renal failure. Clinical course and histology.
- Author
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Sawyer MH, Webb DE, Balow JE, and Straus SE
- Subjects
- Acute Kidney Injury pathology, Acute Kidney Injury urine, Acyclovir administration & dosage, Adult, Crystallization, Humans, Infusions, Intravenous, Kidney pathology, Acute Kidney Injury chemically induced, Acyclovir adverse effects
- Abstract
Four patients with a chronic fatigue syndrome experienced five episodes of acute renal insufficiency associated with high-dose (500 mg/m2) intravenous acyclovir administered intravenously as one-hour infusions. Nephrotoxicity developed despite precautions to avoid volume contraction. Examination of the urinary sediment of three patients by polarizing microscopy showed birefringent needle-shaped crystals within leukocytes. In the most severely affected patient, a serum creatinine concentration of 8.6 mg/dl developed and the patient underwent percutaneous renal biopsy that revealed foci of interstitial inflammation without tubular necrosis. Urine, blood, and renal tissue levels of acyclovir were high. One patient was rechallenged with low-dose intravenous acyclovir and the four patients later received oral acyclovir, all without adverse effect. The combined data from these patients support crystalluria and obstructive nephropathy as a mechanism of acyclovir-induced renal failure in humans. This experience emphasizes the importance of maintaining adequate hydration during high-dose acyclovir therapy.
- Published
- 1988
- Full Text
- View/download PDF
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