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1. Accelerating Universe in Terms of Hankel Function Index

Author

Suratgar, K., Mohsenzadeh, M., Yusofi, E., and Taghizadeh-Farahmand, F.

Subjects
General Relativity and Quantum Cosmology
Abstract

In this paper, $F(\nu)$ cosmology is proposed for the accelerating universe with asymptotic de Sitter expansion in terms of Hankel function index $\nu$. To some extent, both the initial expansion during early inflation and the current accelerated expansion can be studied with a vacuum cosmic fluid i.e. $\Lambda$ in the pure de Sitter phase. Observational data further support the notion of a quasi-vacuum fluid, rather than a pure vacuum, contributing to the quasi-de Sitter acceleration in both the early and late universe. By examining the asymptotic expansion of the Henkel function as an approximate solution of the Mukhanov-Sasaki equation, we seek a more detailed study of quasi-de Sitter solutions in cosmology containing vacuum-like fluid., Comment: 11 pages, 2 tables

Published
2024
Full Text
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11. Population-level risks of alcohol consumption by amount, geography, age, sex, and year: a systematic analysis for the Global Burden of Disease Study 2020

Author

Bryazka, D, Reitsma, MB, Griswold, MG, Abate, KH, Abbafati, C, Kangevari, MA, Kangevari, ZA, Abdoli, A, Abdollahi, M, Abdullah, AYM, Abhilash, ES, Abu Gharbieh, E, Acuna, JM, Addolorato, G, Adebayo, OM, Adekanmbi, V, Adhikari, K, Adhikari, S, Adnani, QES, Afzal, S, Agegnehu, WY, Aggarwal, M, Ahinkorah, BO, Ahmad, AR, Ahmad, S, Ahmad, T, Ahmadi, A, Ahmadi, S, Ahmed, H, Rashid, TA, Akunna, CJ, Al Hamad, H, Alam, MZ, Alem, DT, Alene, KA, Alimohamadi, Y, Alizadeh, A, Allel, K, Alonso, J, Alvand, S, Guzman, NA, Amare, F, Ameyaw, EK, Amiri, S, Ancuceanu, R, Anderson, JA, Andrei, CL, Andrei, T, Arabloo, J, Arshad, M, Artamonov, AA, Aryan, Z, Asaad, M, Asemahagn, MA, Burt, TA, Athari, SS, Atnafu, DD, Atorkey, P, Atreya, A, Ausloos, F, Ausloos, M, Ayano, G, Ayanore, MA, Ayinde, OO, Mateos, JLA, Azadnajafabad, S, Azanaw, MM, Khyavy, MA, Jafari, AA, Azzam, AY, Badiye, AD, Bagheri, N, Bagherieh, S, Bairwa, M, Bakkannavar, SM, Bakshi, RK, Balchut, AH, Null, T, Barra, F, Barrow, A, Baskaran, P, Belo, L, Bennett, DA, Bensenor, IM, Bhagavathula, AS, Bhala, N, Bhalla, A, Bhardwaj, N, Bhardwaj, P, Bhaskar, S, Bhattacharyya, K, Bhojaraja, VS, Bintoro, BS, Blokhina, EAE, Bodicha, BBA, Boloor, A, Bosetti, C, Braithwaite, D, Brenner, H, Briko, NI, Brunoni, AR, Butt, ZA, Cao, C, Cao, Y, Cardenas, R, Carvalho, AF, Carvalho, M, Maia, JMC, Castelpietra, G, de Araujo, LFSC, Cattaruzza, MS, Chakraborty, PA, Charan, J, Chattu, VK, Chaurasia, A, Cherbuin, N, Dinh, TC, Chudal, N, Chung, SC, Churko, C, Ciobanu, LG, Cirillo, M, Claro, RM, Costanzo, S, Cowden, RG, Criqui, MH, Martins, NC, Culbreth, GT, Dachew, BA, Dadras, O, Dai, X, Damiani, G, Dandona, L, Dandona, R, Daniel, BD, Danielewicz, A, Gela, JD, Davletov, K, de Araujo, JAP, de Sa Junior, AR, Debela, SA, Dehghan, A, Demetriades, AK, Molla, MD, Desai, R, Desta, AA, da Silva, DD, Diaz, D, Digesa, LE, Diress, M, Dodangeh, M, Dongarwar, D, Dorostkar, F, Dsouza, HL, Duko, B, Duncan, BB, Edvardsson, K, Ekholuenetale, M, Elgar, FJ, Elhadi, M, Elmonem, MA, Endries, AY, Eskandarieh, S, Etemadimanesh, A, Fagbamigbe, AF, Fakhradiyev, IR, Farahmand, F, Sa Farinha, CSE, Faro, A, Farzadfar, F, Fatehizadeh, A, Fauk, NK, Feigin, VL, Feldman, R, Feng, X, Fentaw, Z, Ferrero, S, Desideri, LF, Filip, I, Fischer, F, Francis, JM, Franklin, RC, Gaal, PA, Gad, MM, Gallus, S, Galvano, F, Ganesan, B, Garg, T, Gebrehiwot, MGD, Gebremeskel, TG, Gebremichael, MA, Gemechu, TR, Getacher, L, Getachew, ME, Obsa, AG, Getie, A, Ghaderi, A, Ghafourifard, M, Ghajar, A, Ghamari, SH, Ghandour, LA, Nour, MG, Ghashghaee, A, Ghozy, S, Glozah, FN, Glushkova, EV, Godos, J, Goel, A, Goharinezhad, S, Golechha, M, Goleij, P, Golitaleb, M, Greaves, F, Grivna, M, Grosso, G, Gudayu, TW, Gupta, B, Gupta, R, Gupta, S, Gupta, VB, Gupta, VK, Nejad, NH, Mirzaian, AH, Hall, BJ, Halwani, R, Handiso, TB, Hankey, GJ, Hariri, S, Haro, JM, Hasaballah, A, Moghaddam, HH, Hay, S, Hayat, K, Heidari, G, Heidari, M, Hendrie, D, Herteliu, C, Heyi, DZ, Hezam, K, Hlongwa, MM, Holla, R, Hossain, MM, Hossain, S, Hosseini, SK, Hosseinzadeh, M, Hostiuc, M, Hostiuc, S, Hu, G, Huang, J, Hussain, S, Ibitoye, SE, Ilic, IM, Ilic, MD, Immurana, M, Irham, LM, Islam, MM, Islam, RM, Islam, SMS, Iso, H, Itumalla, R, Iwagami, M, Jabbarinejad, R, Jacob, L, Jakovljevic, M, Jamalpoor, Z, Jamshidi, E, Jayapal, SK, Jayarajah, UU, Jayawardena, R, Jebai, R, Jeddi, SA, Jema, AT, Jha, RP, Jindal, HA, Jonas, JB, Joo, T, Joseph, N, Joukar, F, Jozwiak, JJ, Jurisson, M, Kabir, A, Kabthymer, RH, Kamble, BD, Kandel, H, Kanno, GG, Kapoor, N, Karaye, IM, Karimi, SE, Kassa, BG, Kaur, RJ, Kayode, GA, Keykhaei, M, Khajuria, H, Khalilov, R, Khan, IA, Ab Khan, M, Kim, H, Kim, J, Kim, MS, Kimokoti, RW, Kivimaki, M, Klymchuk, V, Knudsen, AKS, Kolahi, AA, Korshunov, VA, Koyanagi, A, Krishan, K, Krishnamoorthy, Y, Kumar, GA, Kumar, N, Ben, L, Lallukka, T, Lasrado, S, Lau, J, Lee, SW, Lee, WC, Lee, YH, Lim, LL, Lim, SS, Lobo, SW, Lopukhov, PD, Lorkowski, S, Lozano, R, Lucchetti, G, Madadizadeh, F, Mahjoub, S, Mahmoodpoor, A, Mahumud, RA, Makki, A, Malekpour, MR, Manjunatha, N, Mansouri, B, Mansournia, MA, Raga, JM, Villa, FAM, Matzopoulos, R, Maulik, PK, Mayeli, M, McGrath, JJ, Meena, JK, Nasab, EM, Menezes, RG, Mensink, GBM, Mentis, AFA, Meretoja, A, Merga, BT, Mestrovic, T, Jonasson, JM, Miazgowski, B, de Sa, ACMGN, Miller, TR, Mini, G, Mirica, A, Mirijello, A, Mirmoeeni, S, Mirrakhimov, EM, Misra, S, Moazen, B, Mobarakabadi, M, Moccia, M, Mohammad, Y, Mohammadi, E, Hafshejani, AM, Mohammed, TA, Moka, N, Mokdad, AH, Momtazmanesh, S, Moradi, Y, Mostafavi, E, Mubarik, S, Mullany, EC, Mulugeta, BT, Zamora, EM, Murray, CJL, Mwita, JC, Naghavi, M, Naimzada, MD, Nangia, V, Nayak, BP, Negoi, I, Negoi, RI, Nejadghaderi, SA, Nepal, S, Neupane, SPP, Kandel, SN, Nigatu, YT, Nowroozi, A, Nuruzzaman, KM, Nzoputam, CI, Obamiro, KO, Ogbo, FA, Oguntade, AS, Aliabad, HO, Olakunde, BO, Oliveira, GMM, Bali, AO, Omer, E, Altamirano, DVO, Otoiu, A, Otstavnov, SS, Oumer, B, Mahesh, PA, Monedero, AP, Palladino, R, Pana, A, Jonas, SP, Pandey, A, Pardhan, S, Parekh, T, Park, EK, Parry, CDH, Kan, FP, Patel, J, Pati, S, Patton, GC, Paudel, U, Pawar, S, Peden, AE, Petcu, IR, Phillips, MR, Pinheiro, M, Plotnikov, E, Pradhan, PMS, Prashant, A, Quan, J, Radfar, A, Rafiei, A, Raghav, PR, Movaghar, VR, Rahman, A, Rahman, MM, Rahman, M, Rahmani, AM, Rahmani, S, Ranabhat, CL, Ranasinghe, P, Rao, CR, Rasali, DP, Rashidi, MM, Ratan, ZA, Rawaf, DL, Rawaf, S, Rawal, L, Renzaho, AMN, Rezaei, N, Rezaei, S, Rezaeian, M, Riahi, SM, Rodriguez, ER, Roth, GA, Rwegerera, GM, Saddik, B, Sadeghi, E, Sadeghian, R, Saeed, U, Saeedi, F, Sagar, R, Sahebkar, A, Sahoo, H, Sahraian, MA, Rahman, KSU, Salahi, S, Salimzadeh, H, Samy, AM, Sanmarchi, F, Milicevic, MMS, Sarikhani, Y, Sathian, B, Saya, GK, Sayyah, M, Schmidt, MI, Schutte, AE, Schwarzinger, M, Schwebel, DC, Seidu, AA, Kumar, NS, SeyedAlinaghi, S, Seylani, A, Sha, F, Shahin, S, Sanavi, FS, Shahrokhi, S, Shaikh, MA, Shaker, E, Shakhmardanov, MZ, Beyranvand, MS, Sheikhbahaei, S, Sheikhi, RA, Shetty, A, Shetty, JK, Shiferaw, DS, Shigematsu, M, Shiri, R, Shirkoohi, R, Shivakumar, KM, Shivarov, V, Shobeiri, P, Shrestha, R, Sidemo, NB, Sigfusdottir, ID, Silva, DAS, da Silva, NT, Singh, JA, Singh, S, Skryabin, VY, Skryabina, AA, Sleet, DA, Solmi, M, Solomon, Y, Song, S, Song, Y, Sorensen, RJD, Soshnikov, S, Soyiri, IN, Stein, DJ, Subba, SH, Szocska, M, Seisdedos, RT, Tabuchi, T, Taheri, M, Tan, KK, Tareke, M, Tarkang, EE, Temesgen, G, Temesgen, WA, Temsah, MH, Thankappan, KR, Thapar, R, Thomas, NK, Tiruneh, C, Todorovic, J, Torrado, M, Touvier, M, Palone, MRT, Mai, TNT, Llimos, ST, Tripathy, JP, Vakilian, A, Valizadeh, R, Varmaghani, M, Varthya, SB, Vasankari, TJ, Vos, T, Wagaye, B, Waheed, Y, Walde, MT, Wang, C, Wang, Y, Wang, YP, Westerman, R, Wickramasinghe, ND, Wubetu, AD, Xu, S, Yamagishi, K, Yang, L, Yesera, GEE, Yigit, A, Yigit, V, Yimaw, AE, Yon, DK, Yonemoto, N, Yu, C, Zadey, S, Zahir, M, Zare, I, Zastrozhin, MS, Zastrozhina, A, Zhang, ZJ, Zhong, C, Zmaili, M, Zuniga, YMH, Gakidou, E, Madureira-Carvalho, AM, Bryazka, D, Reitsma, MB, Griswold, MG, Abate, KH, Abbafati, C, Kangevari, MA, Kangevari, ZA, Abdoli, A, Abdollahi, M, Abdullah, AYM, Abhilash, ES, Abu Gharbieh, E, Acuna, JM, Addolorato, G, Adebayo, OM, Adekanmbi, V, Adhikari, K, Adhikari, S, Adnani, QES, Afzal, S, Agegnehu, WY, Aggarwal, M, Ahinkorah, BO, Ahmad, AR, Ahmad, S, Ahmad, T, Ahmadi, A, Ahmadi, S, Ahmed, H, Rashid, TA, Akunna, CJ, Al Hamad, H, Alam, MZ, Alem, DT, Alene, KA, Alimohamadi, Y, Alizadeh, A, Allel, K, Alonso, J, Alvand, S, Guzman, NA, Amare, F, Ameyaw, EK, Amiri, S, Ancuceanu, R, Anderson, JA, Andrei, CL, Andrei, T, Arabloo, J, Arshad, M, Artamonov, AA, Aryan, Z, Asaad, M, Asemahagn, MA, Burt, TA, Athari, SS, Atnafu, DD, Atorkey, P, Atreya, A, Ausloos, F, Ausloos, M, Ayano, G, Ayanore, MA, Ayinde, OO, Mateos, JLA, Azadnajafabad, S, Azanaw, MM, Khyavy, MA, Jafari, AA, Azzam, AY, Badiye, AD, Bagheri, N, Bagherieh, S, Bairwa, M, Bakkannavar, SM, Bakshi, RK, Balchut, AH, Null, T, Barra, F, Barrow, A, Baskaran, P, Belo, L, Bennett, DA, Bensenor, IM, Bhagavathula, AS, Bhala, N, Bhalla, A, Bhardwaj, N, Bhardwaj, P, Bhaskar, S, Bhattacharyya, K, Bhojaraja, VS, Bintoro, BS, Blokhina, EAE, Bodicha, BBA, Boloor, A, Bosetti, C, Braithwaite, D, Brenner, H, Briko, NI, Brunoni, AR, Butt, ZA, Cao, C, Cao, Y, Cardenas, R, Carvalho, AF, Carvalho, M, Maia, JMC, Castelpietra, G, de Araujo, LFSC, Cattaruzza, MS, Chakraborty, PA, Charan, J, Chattu, VK, Chaurasia, A, Cherbuin, N, Dinh, TC, Chudal, N, Chung, SC, Churko, C, Ciobanu, LG, Cirillo, M, Claro, RM, Costanzo, S, Cowden, RG, Criqui, MH, Martins, NC, Culbreth, GT, Dachew, BA, Dadras, O, Dai, X, Damiani, G, Dandona, L, Dandona, R, Daniel, BD, Danielewicz, A, Gela, JD, Davletov, K, de Araujo, JAP, de Sa Junior, AR, Debela, SA, Dehghan, A, Demetriades, AK, Molla, MD, Desai, R, Desta, AA, da Silva, DD, Diaz, D, Digesa, LE, Diress, M, Dodangeh, M, Dongarwar, D, Dorostkar, F, Dsouza, HL, Duko, B, Duncan, BB, Edvardsson, K, Ekholuenetale, M, Elgar, FJ, Elhadi, M, Elmonem, MA, Endries, AY, Eskandarieh, S, Etemadimanesh, A, Fagbamigbe, AF, Fakhradiyev, IR, Farahmand, F, Sa Farinha, CSE, Faro, A, Farzadfar, F, Fatehizadeh, A, Fauk, NK, Feigin, VL, Feldman, R, Feng, X, Fentaw, Z, Ferrero, S, Desideri, LF, Filip, I, Fischer, F, Francis, JM, Franklin, RC, Gaal, PA, Gad, MM, Gallus, S, Galvano, F, Ganesan, B, Garg, T, Gebrehiwot, MGD, Gebremeskel, TG, Gebremichael, MA, Gemechu, TR, Getacher, L, Getachew, ME, Obsa, AG, Getie, A, Ghaderi, A, Ghafourifard, M, Ghajar, A, Ghamari, SH, Ghandour, LA, Nour, MG, Ghashghaee, A, Ghozy, S, Glozah, FN, Glushkova, EV, Godos, J, Goel, A, Goharinezhad, S, Golechha, M, Goleij, P, Golitaleb, M, Greaves, F, Grivna, M, Grosso, G, Gudayu, TW, Gupta, B, Gupta, R, Gupta, S, Gupta, VB, Gupta, VK, Nejad, NH, Mirzaian, AH, Hall, BJ, Halwani, R, Handiso, TB, Hankey, GJ, Hariri, S, Haro, JM, Hasaballah, A, Moghaddam, HH, Hay, S, Hayat, K, Heidari, G, Heidari, M, Hendrie, D, Herteliu, C, Heyi, DZ, Hezam, K, Hlongwa, MM, Holla, R, Hossain, MM, Hossain, S, Hosseini, SK, Hosseinzadeh, M, Hostiuc, M, Hostiuc, S, Hu, G, Huang, J, Hussain, S, Ibitoye, SE, Ilic, IM, Ilic, MD, Immurana, M, Irham, LM, Islam, MM, Islam, RM, Islam, SMS, Iso, H, Itumalla, R, Iwagami, M, Jabbarinejad, R, Jacob, L, Jakovljevic, M, Jamalpoor, Z, Jamshidi, E, Jayapal, SK, Jayarajah, UU, Jayawardena, R, Jebai, R, Jeddi, SA, Jema, AT, Jha, RP, Jindal, HA, Jonas, JB, Joo, T, Joseph, N, Joukar, F, Jozwiak, JJ, Jurisson, M, Kabir, A, Kabthymer, RH, Kamble, BD, Kandel, H, Kanno, GG, Kapoor, N, Karaye, IM, Karimi, SE, Kassa, BG, Kaur, RJ, Kayode, GA, Keykhaei, M, Khajuria, H, Khalilov, R, Khan, IA, Ab Khan, M, Kim, H, Kim, J, Kim, MS, Kimokoti, RW, Kivimaki, M, Klymchuk, V, Knudsen, AKS, Kolahi, AA, Korshunov, VA, Koyanagi, A, Krishan, K, Krishnamoorthy, Y, Kumar, GA, Kumar, N, Ben, L, Lallukka, T, Lasrado, S, Lau, J, Lee, SW, Lee, WC, Lee, YH, Lim, LL, Lim, SS, Lobo, SW, Lopukhov, PD, Lorkowski, S, Lozano, R, Lucchetti, G, Madadizadeh, F, Mahjoub, S, Mahmoodpoor, A, Mahumud, RA, Makki, A, Malekpour, MR, Manjunatha, N, Mansouri, B, Mansournia, MA, Raga, JM, Villa, FAM, Matzopoulos, R, Maulik, PK, Mayeli, M, McGrath, JJ, Meena, JK, Nasab, EM, Menezes, RG, Mensink, GBM, Mentis, AFA, Meretoja, A, Merga, BT, Mestrovic, T, Jonasson, JM, Miazgowski, B, de Sa, ACMGN, Miller, TR, Mini, G, Mirica, A, Mirijello, A, Mirmoeeni, S, Mirrakhimov, EM, Misra, S, Moazen, B, Mobarakabadi, M, Moccia, M, Mohammad, Y, Mohammadi, E, Hafshejani, AM, Mohammed, TA, Moka, N, Mokdad, AH, Momtazmanesh, S, Moradi, Y, Mostafavi, E, Mubarik, S, Mullany, EC, Mulugeta, BT, Zamora, EM, Murray, CJL, Mwita, JC, Naghavi, M, Naimzada, MD, Nangia, V, Nayak, BP, Negoi, I, Negoi, RI, Nejadghaderi, SA, Nepal, S, Neupane, SPP, Kandel, SN, Nigatu, YT, Nowroozi, A, Nuruzzaman, KM, Nzoputam, CI, Obamiro, KO, Ogbo, FA, Oguntade, AS, Aliabad, HO, Olakunde, BO, Oliveira, GMM, Bali, AO, Omer, E, Altamirano, DVO, Otoiu, A, Otstavnov, SS, Oumer, B, Mahesh, PA, Monedero, AP, Palladino, R, Pana, A, Jonas, SP, Pandey, A, Pardhan, S, Parekh, T, Park, EK, Parry, CDH, Kan, FP, Patel, J, Pati, S, Patton, GC, Paudel, U, Pawar, S, Peden, AE, Petcu, IR, Phillips, MR, Pinheiro, M, Plotnikov, E, Pradhan, PMS, Prashant, A, Quan, J, Radfar, A, Rafiei, A, Raghav, PR, Movaghar, VR, Rahman, A, Rahman, MM, Rahman, M, Rahmani, AM, Rahmani, S, Ranabhat, CL, Ranasinghe, P, Rao, CR, Rasali, DP, Rashidi, MM, Ratan, ZA, Rawaf, DL, Rawaf, S, Rawal, L, Renzaho, AMN, Rezaei, N, Rezaei, S, Rezaeian, M, Riahi, SM, Rodriguez, ER, Roth, GA, Rwegerera, GM, Saddik, B, Sadeghi, E, Sadeghian, R, Saeed, U, Saeedi, F, Sagar, R, Sahebkar, A, Sahoo, H, Sahraian, MA, Rahman, KSU, Salahi, S, Salimzadeh, H, Samy, AM, Sanmarchi, F, Milicevic, MMS, Sarikhani, Y, Sathian, B, Saya, GK, Sayyah, M, Schmidt, MI, Schutte, AE, Schwarzinger, M, Schwebel, DC, Seidu, AA, Kumar, NS, SeyedAlinaghi, S, Seylani, A, Sha, F, Shahin, S, Sanavi, FS, Shahrokhi, S, Shaikh, MA, Shaker, E, Shakhmardanov, MZ, Beyranvand, MS, Sheikhbahaei, S, Sheikhi, RA, Shetty, A, Shetty, JK, Shiferaw, DS, Shigematsu, M, Shiri, R, Shirkoohi, R, Shivakumar, KM, Shivarov, V, Shobeiri, P, Shrestha, R, Sidemo, NB, Sigfusdottir, ID, Silva, DAS, da Silva, NT, Singh, JA, Singh, S, Skryabin, VY, Skryabina, AA, Sleet, DA, Solmi, M, Solomon, Y, Song, S, Song, Y, Sorensen, RJD, Soshnikov, S, Soyiri, IN, Stein, DJ, Subba, SH, Szocska, M, Seisdedos, RT, Tabuchi, T, Taheri, M, Tan, KK, Tareke, M, Tarkang, EE, Temesgen, G, Temesgen, WA, Temsah, MH, Thankappan, KR, Thapar, R, Thomas, NK, Tiruneh, C, Todorovic, J, Torrado, M, Touvier, M, Palone, MRT, Mai, TNT, Llimos, ST, Tripathy, JP, Vakilian, A, Valizadeh, R, Varmaghani, M, Varthya, SB, Vasankari, TJ, Vos, T, Wagaye, B, Waheed, Y, Walde, MT, Wang, C, Wang, Y, Wang, YP, Westerman, R, Wickramasinghe, ND, Wubetu, AD, Xu, S, Yamagishi, K, Yang, L, Yesera, GEE, Yigit, A, Yigit, V, Yimaw, AE, Yon, DK, Yonemoto, N, Yu, C, Zadey, S, Zahir, M, Zare, I, Zastrozhin, MS, Zastrozhina, A, Zhang, ZJ, Zhong, C, Zmaili, M, Zuniga, YMH, Gakidou, E, and Madureira-Carvalho, AM

Abstract

BACKGROUND: The health risks associated with moderate alcohol consumption continue to be debated. Small amounts of alcohol might lower the risk of some health outcomes but increase the risk of others, suggesting that the overall risk depends, in part, on background disease rates, which vary by region, age, sex, and year. METHODS: For this analysis, we constructed burden-weighted dose-response relative risk curves across 22 health outcomes to estimate the theoretical minimum risk exposure level (TMREL) and non-drinker equivalence (NDE), the consumption level at which the health risk is equivalent to that of a non-drinker, using disease rates from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2020 for 21 regions, including 204 countries and territories, by 5-year age group, sex, and year for individuals aged 15-95 years and older from 1990 to 2020. Based on the NDE, we quantified the population consuming harmful amounts of alcohol. FINDINGS: The burden-weighted relative risk curves for alcohol use varied by region and age. Among individuals aged 15-39 years in 2020, the TMREL varied between 0 (95% uncertainty interval 0-0) and 0·603 (0·400-1·00) standard drinks per day, and the NDE varied between 0·002 (0-0) and 1·75 (0·698-4·30) standard drinks per day. Among individuals aged 40 years and older, the burden-weighted relative risk curve was J-shaped for all regions, with a 2020 TMREL that ranged from 0·114 (0-0·403) to 1·87 (0·500-3·30) standard drinks per day and an NDE that ranged between 0·193 (0-0·900) and 6·94 (3·40-8·30) standard drinks per day. Among individuals consuming harmful amounts of alcohol in 2020, 59·1% (54·3-65·4) were aged 15-39 years and 76·9% (73·0-81·3) were male. INTERPRETATION: There is strong evidence to support recommendations on alcohol consumption varying by age and location. Stronger interventions, particularly those tailored towards younger individuals, are needed to reduce the substantial global health loss attribu

Published
2022

16. Etiologic assessment of neonatal cholestasis: a six year study in Children Medical Center, Tehran

Author

Fallahi GH, Farahmand F, and NematKhorasani E

Subjects
obstructive icterus, Medicine (General), R5-920
Abstract

Background: Neonatal cholestasis is an important disease of the liver and biliary ducts in infancy. In neglected cases, the disease has irreversible complications. Idiopathic neonatal hepatitis, biliary atresia, TORCH infections and choledochal cyst are important causes of neonatal cholestasis. The aim of this study was to determine the causes of cholestasis among neonates admitted to the Children’s Medical Center of Tehran University. Methods: This is a descriptive, retrospective study including 109 patients diagnosed with obstructive icterus, from 1994 to 2001. With data collected from hospital records, the inclusion criteria consisted of cholestasis with a conjugated bilirubin of up to 2 mg/dl from at least two laboratory samples (20% of total bilirubin). The definitive diagnosis of cholestasis included the laboratory investigations, which were in the patients’ hospital records and documented by their physicians. Results: Our patients (63 males and 46 females) had a mean age of 40±6 days. The most common clinical findings were icterus, acholic stool and hepatosplenomegaly. The most common cause of cholestasis was idiopathic neonatal hepatitis followed by biliary atresia, which together caused 75% of all the cases in this study. Conclusions: In our general population, the most common causes of neonatal cholestasis are hepatitis and biliary atresia. In other investigations, the etiology of neonatal cholestasis was different than that of this study. Because the number of different disorders presenting with cholestasis may be greater during the neonatal stage than at any other time of life, early diagnosis and treatment is very important for improved prognosis.

Published
2007

17. Tumors of the liver; a ten year study in Children Medical Center

Author

Farahmand F, Khatami GH, Mehrabi V.A, Mahjoob F, Ezadyar M, and Mehdizadeh M

Subjects
hepatoblastoma, hepatocellular carcinoma, Medicine (General), R5-920
Abstract

Background: The aim of this study was to review the frequency, histopathology and outcome in children with tumors of the liver. Methods: Included in this retrospective/descriptive study were 30 children treated for liver tumors from 1375-1384 (ca. 1996-2005), at Children’s Hospital Medical Center, Tehran, Iran. We included the clinical, radiologic, and pathologic data of our patients, focusing on the frequency, etiology and outcome. Results: Patient ages ranged from three months to 12 years (median 3.8 years), with 18 males (60%) and 12 females (40%). Of these, 17 patients had hepatoblastoma (55.66%), including 13 males and four females, with an age range of six months to five years. Four cases (13.33%) had neuroblastoma. Hepatocellular carcinoma (HCC) was found in three cases (10%), all of whom were carriers of hepatitis B. Two cases (6.66%) were diagnosed with mesenchymal hamartoma, two cases (6.66%) with hemangioendothelioma and two cases (6.66%) with rhabdomyosarcoma and leiomyosarcoma of the biliary tract. Abdominal swelling and hepatomegaly were seen in all of patients. Jaundice was observed in two cases. Serum alpha-fetoprotein levels greater than 500 ng/ml were seen in 17 cases (56.66%). All patients were receiving specific treatment. The three-year survival rate was 65% for hepatoblastoma and 2% for HCC Conclusion: With the introduction of specific treatment, the survival rate for children with tumors of the liver has significantly increased. Further improvement can be achieved using diagnostic biopsy for hepatoblastoma, although it may result in complications, and preoperative chemotherapy followed by complete surgical excision (per International Society of Pediatric Oncology guidelines), yielding an outstanding survival rate of 80%.

Published
2007

18. Introducing a new histologic scoring system for iron deposition in liver in thalassemia major, compared with atomic absorption spectrometry

Author

Fatemeh Elham Mahjoub, H. Tavassoli, I. Jahanzad, Fatemeh Farahmand F,, M. Izadyar, M. Najafi Sani, and M. Lamei Rashti

Subjects
Thalassemia major, Liver iron deposition, Atomic absorption spectroscopy, Histologic scorings, Diseases of the blood and blood-forming organs, RC633-647.5
Abstract

Introduction: Iron deposition in liver is a major finding in thalassemic patients. Histologic grading of iron deposition is widely used in many institutions and various grading systems have been introduced. The aim of this study was to introduce a new histologic scoring system (Markaze Tebbi Koodakan: MTK 1, 2 and 3) which considers size and density of iron granules as well as zone of iron deposition and verify this system with atomic absorption spectrometry (AAS method). Materials and methods: Liver biopsies from 63 patients were evaluated, 40 (63.5%) were male and 20 (36.5%) were female. The mean age of the patients was 8.01±3.7 and the age range was from 1.8 to 15 years. Iron scoring was performed according to Sindram & Marx and MTK 1-3 scoring systems.Paraffin blocks were processed for AAS and the results of the iron analysis (HIC: hepatic iron concentration) were reported as µmol/g dry liver weight. The statistical analysis was performed using SPSS, version 16 (SPSS Inc., Chicago, IL, USA). Results: The mean (SD) of hepatic iron concentration was 230.9 (121.2) µmol/g dry weight. The relationship between the variables HIC, HII (hepatic iron index) and all histological grading of iron (S&M and MTK1-3) was very strong. Significant differences were identified between the mean HIC in scores 1 & 2 of all histological iron scorings (S&M and MTK 1-3), but no significant differences identified in other adjacent scores in all histological iron scorings (S&M and MTK 1, 2 and 3). Discussion and conclusion: New scoring system introduced by us in this study was very much the same as simple Sindram and Marx classification. So it is concluded that although size of iron granules is important in lower scores, but in higher scores it is not as much important as the zone in which iron granules are deposited.

Published
2014

19. Etiologies of chronic liver disease in children

Author

Farahmand F and Shiasi Arani K

Subjects
Chronic liver disease, Cirrhosis, Biliary disorder, Medicine (General), R5-920
Abstract

Chronic Liver diseases in children is the result of many different diseases including: metabolic, genetic, infectious, toxic and idiopathic causes. This was a case series study on 133 infants and children with age range 6 month to 12 years old, who presented clinically with manifestation of chronic liver disease and were admitted to Children Hospital Medical Center from year 1999 to 2000. In this study, 32 (24.5 percent) patients had autoimmune chronic hepatitis, 15 (11.3 percent) Glycogen storage diseases, 12 (9 percent) extrahepatic biliary atresia, 11 (8.2 percent) willson disease, 10 (7.5 percent) cryptogenic cirrhosis, 6 (4.5 percent) chronic hepatitis C, 5 (3.8 percen) chronic hepatitic B, 5 (3.8 percent) galactosemia 3 (2.25 percent) congenital hepatic fibrosis, 3 (3.8 percent) histiocytosis X, 3 (2.25 percent) sclerosing cholangitis, 2 (1.5 percent) byler’s disease 2 (1.5 percent) primary tuberculosis, 1 (0.75 percent) choledocalcyst, 1 (0.75 percent) Alagyle syndrome. According to our data, chronic liver disease should be considered in infants and children. In our study, the most common causes are found to be: metabolic and genetic diseases (37.5 percent), chronic autoimmune hepatitis (24 percent) and biliary disorders (14 percent), that encompass 86 percent of the patients.

Published
2001

20. Biomechanical analysis of the anterior displacement of Tibial tuberosity (Maquet operation): A computer model study

Author

Farahmand F and Tahmasebi MN

Subjects
Anterior displacement tibial tuberosity, Medicine (General), R5-920
Abstract

Computer model of the patellofemoral joint was developed and the effects on the anterior displacement of the tibial tuberosity were investigated. The input geometrical and verification data for the model were obtained form an experimental study on a cadaver knee, mounted in an instron machine. The computer program found the configuration of the patellofemoral joint which satified both the geometrical and force equilibrium conditions, simultaneously, using a trial graphical approach.verification of the model was achieved by determining the patellar sagittal plane motion and patellofemoral contact locations and comparing the results with the experimental results of the same specimen and published data. Simulation of the anterior displacement of the tibial tuberosity by the model showed that the location of contact area migrates distally on the femur and proximally on the patella following operation. The contact force of the patellofemoral joint decreased significantly by 70% at full extension, 30% at 30 degrees flexion and around 15% at higher flexion angles for a 1 cm anterior displacement of the tibial tuberosity and nearly doubled for a 2cm anterior displacement. The change of the effective moment are of the quadriceps was not considerable. The results suggest that the major effect of the Maquet operation on the contact force appears in extension and mid-flexion rather than deep flexion amgles. Further displacement of the tuberosity enhances the reduction of the contact force, however, the total reduction is less than what was predicted by Maquet. The change of the contact location relieves pain in short term but causes hyperpressure in the proximal retropatellar surface which might be detrimental in long term

Published
2000

21. Impact of nearby adiabatic and isothermal barriers on the thermal characteristics of a vertically oriented pot-core magnetic component

Author

Farahmand, F., Lavers, J.D., and Dawson, F.P.

Subjects
Air flow -- Analysis, Boundary value problems -- Usage, Business, Electronics, Electronics and electrical industries
Abstract

The coupled problem of estimating the temperature rise due to the winding and core loss in a vertically oriented magnetic component is considered. The principle contributions in this paper are two-fold: 1) the coupling between the losses and thermal problems for the component is addressed accounting for the effects of nearby barriers and 2) the complication that the convection coefficient is not known accurately is overcome by means of solving a coupled electrothermal--air flow problem in order to characterize heat transfer to the ambient surroundings. It is shown that the coupling between the loss and temperature in the magnetic material has negligible effects on the temperature since the deviation in temperature is not more than 13% at worst if the loss is considered constant for different barrier-to-core distances. The convection coefficients of the core's top and side surfaces are shown not to be significantly influenced by the boundary condition imposed on the barrier. The boundary conditions substantially affect the temperature by introducing an additional path for heat transfer. Additionally, the contribution of radiation is found to be roughly 50% of the total loss regardless of the barrier height and distance and its boundary condition. Index Terms--Convection, heat transfer, loss-temperature coupling, radiation.

Published
2007

28. Association of Food Allergies, Cow’s Milk Allergy, and Asthma With Pediatric Inflammatory Bowel Disease

Author

Fallahi, G. -H, Khatami, G. -R, Esmailzadehha, N., Najafi, M., Farahmand, F., Motamed, F., Khodadad, A., Nima Rezaei, Modarresi, M. -R, Qorbani, M., and Bagherian, R.

Subjects
lcsh:R5-920, Food hypersensitivity, Ulcerative colitis, Crohn disease, Child, lcsh:Medicine (General), digestive system diseases, Asthma, Milk hypersensitivity
Abstract

There are controversies on the association of childhood allergic diseases with inflammatory bowel diseases (IBD). The aim of this study was to examine the association between food allergy, cow’s milk allergy (CMA), and asthma with pediatric IBD in Iranian population. This case-control study was conducted on 200 individuals less than 18-year-old (100 with IBD and 100 as control group). Medical records, clinical presentation, and laboratory and para-clinical findings related to food allergy, CMA, and asthma were reviewed for all participants in both groups and were recorded. Among 100 children with IBD, 40 had Crohn's disease, and 60 had ulcerative colitis. The frequency of food allergy, cow's milk allergy, and asthma in children with IBD was significantly higher than the control group (P

Published
2018

29. Design and Fabrication of a New Expandable Transtibial Liner with Manual Volume Control: A Prototype.

Author

Nouri M. J., Aminian G., Farahmand F., and Rahgozar M.

Subjects
RESIDUAL limbs, SURFACE pressure, PROTOTYPES, WATER pumps, BLADDER, ARTIFICIAL limbs, RAPID prototyping, ARTIFICIAL knees
Abstract

Diurnal volume changes is one of the main factors influencing socket fit in transtibial prosthesis and causing pressure problem issues. Embedded bladder liners have been recently a potential approach to deal with this problem. The aim of this technical note was to introduce a new transtibial silicone liner designed based on hybrid socket theory. To make expandability in the liner, an integrated wax structure was constructed over the selected areas of the positive model and then removed after lamination process. In addition, a mechanical system with manual control was designed to fit the liner with the residual limb volume by pumping the water in or out of the liner through connective tubes. The results showed that this new design had high reliability in maintaining identical surface pressures after volume changes in laboratory trials. Therefore, it seems that selective expandability of this liner would accommodate residual limb volume fluctuations without disturbing effect on preliminary pressure pattern. [ABSTRACT FROM AUTHOR]

Published
2020
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32. Diagnosis of Spontaneous Bacterial Peritonitis in Children by Reagent Strips

Author

Farahmand, F., Roze, M. E., Shams, S., Ghajarzadeh, M., and Mohammad Eshagh Rozeh

Subjects
Liver Cirrhosis, Male, Nitrite, Peritonitis, Sensitivity and Specificity, Spontaneous Bacterial Peritonitis, Predictive Value of Tests, Ascitic Fluid, Humans, Child, Children, Nitrites, Reagent Strips, lcsh:R5-920, Age Factors, Infant, Newborn, Infant, Bacterial Infections, Clinical Enzyme Tests, Ascetic Fluid, Child, Preschool, Female, Leukocyte Esterase, lcsh:Medicine (General), Carboxylic Ester Hydrolases, Biomarkers
Abstract

This study was aimed to evaluate the efficacy of dipstick tests (leukocyte esterase and nitrite) in diagnosis of spontaneous bacterial peritonitis (SBP) in cirrhotic patients. Forty six children with ascites hospitalized between 2009 and 2010 in Children Medical Center were enrolled in this study. Reagent strip assays for leukocyte esterase and nitrite were performed on ascetic fluid and the results were compared to manual cell counting and ascitic fluid culture. SBP was defined as having a polymorphonuclear ascites count of ≥ 250/mm3. Twenty children were female and twenty six were male with mean age of 3±3.9 years. The sensitivity specificity, positive and negative predictive values of the leukocyte esterase reagent strips were all 100%. The sensitivity, specificity, positive and negative predictive value of the nitrite reagent strip test were 100%, 97%, 90% and 100% respectively. Leukocyte esterase reagent strips may provide a rapid, bedside diagnostic test for the diagnosis of SBP.

Published
2013

33. Acknowledgement to reviewers of JSAN in 2016

Author

Albano, M., Anthony, C., Arefi, A., Arriola, A., Barton, G., Beongku, A., Boström, K., Brandao, P., Calbimonte, J., Decotignie, J., Delsing, J., Eguiraun, H., Emokpae, L., Farahmand, F., Garrido, P., Ge, M., Giani, A., Gonzalez, L., Gotta, A., He, S., Hernandez, N., Hsu, C., Jayaraman, P., Kim, K., Kokkinos, P., Labeodan, T., Le, D., Lee, T., Li, Y., Lin, C., Lloret-Mauri, J., Marin, A., Martalo, M., Meseguer, R., Minet, P., Mitton, N., Moreno, A., Muñoz-Gea, J., Pham, C., Piras, A., Puliafito, A., Qiao, Y., Rzonca, D., Savage, N., Scatá, M., Sha, M., Shahnia, Farhad, Silva, I., Singh, D., Soares, V., Szott, S., Teng, R., Tervonen, J., Tsang, K., Vangelista, L., Vepakomma, P., Verticale, G., Villadangos, J., Wan, J., Wang, K., Wang, X., Wu, Y., Yang, B., Zappatore, M., Zhang, X., Zhao, Y., Albano, M., Anthony, C., Arefi, A., Arriola, A., Barton, G., Beongku, A., Boström, K., Brandao, P., Calbimonte, J., Decotignie, J., Delsing, J., Eguiraun, H., Emokpae, L., Farahmand, F., Garrido, P., Ge, M., Giani, A., Gonzalez, L., Gotta, A., He, S., Hernandez, N., Hsu, C., Jayaraman, P., Kim, K., Kokkinos, P., Labeodan, T., Le, D., Lee, T., Li, Y., Lin, C., Lloret-Mauri, J., Marin, A., Martalo, M., Meseguer, R., Minet, P., Mitton, N., Moreno, A., Muñoz-Gea, J., Pham, C., Piras, A., Puliafito, A., Qiao, Y., Rzonca, D., Savage, N., Scatá, M., Sha, M., Shahnia, Farhad, Silva, I., Singh, D., Soares, V., Szott, S., Teng, R., Tervonen, J., Tsang, K., Vangelista, L., Vepakomma, P., Verticale, G., Villadangos, J., Wan, J., Wang, K., Wang, X., Wu, Y., Yang, B., Zappatore, M., Zhang, X., and Zhao, Y.

Published
2017

34. Mast Cell Density in Cardio-Esophageal Mucosa

Author

Mahjoub, F. E., Hoda Asefi, Farahmand, F., Pourpak, Z., Abbasi, A., and Amini, Z.

Subjects
Pediatric, Esophagogastric junction mucosa, Gastroesophageal reflux, lcsh:R, Mast cells, Density, lcsh:Medicine
Abstract

Mast cells are related to certain gastrointestinal complaints. Mast cell density has not been studied in cardio-esophageal region to the best of our knowledge. In this study we wanted to obtain an estimate of mast cell density in this region and compare it with mast cell density in antrum. From April 2007 till March 2010, we chose children (

Published
2014

36. Mechanical Design and Simulation of a Saddle-Assistive Device for Sit-to-Stand Transfer in Healthy Subjects.

Author

Najafabadi, A. Hojjati, Amini, S., and Farahmand, F.

Subjects
HUMANOID robots, MEDICAL rehabilitation
Abstract

Assistive device equipment can improve the performance of sit-to-stand (STS), standing, and walking of people with lower limb disability. The motorized assistive device is usually expensive and the use of another assistive device also makes an excessive force in the upper and lower extremity during (STS) transfer, which is not desirable for patients. In addition, only a few number of the non-motorized assistive devices that support all three phases; namely, sit-to-stand, standing, and walking are available. Consequently, improving and creating the new technology seems essential in this case. In this paper, the design procedure of saddle-assistive device is described in order to make use of the linear actuator in (STS) transfer and walk. Experimental results orientation of the shoulder during (STS) was recorded in the lab. Then, based on this analysis and simulation, saddle-assistive devices(S-AD) were designed and prototyped. Function prototype of the (S-AD) was done in the lab on a healthy person in (STS) and walking and then was compared with (STS) in normal mode. It is proposed due to the integration of the three phases in one device. Other advantages are force reduction on lower limbs, creating conditions of stability, and independence for patients with lower limb disability. [ABSTRACT FROM AUTHOR]

Published
2017

37. Prevalence of Vitamin D Deficiency and Rickets in Children with Cholestasis in Iran

Author

Mohammad Eshagh Rozeh, Najafi, M., Farahmand, F., Motamed, F., Ghajarzadeh, M., Mohammadi, J., and Roze, M. E.

Subjects
Male, lcsh:R5-920, Cholestasis, Infant, Newborn, Infant, Chronic cholestasis, Iran, Vitamin D Deficiency, Child, Preschool, Prevalence, Humans, Female, Vitamin D, Child, lcsh:Medicine (General), Children, Rickets
Abstract

This study was aimed to determine prevalence of Vitamin D deficiency and rickets in children with cholestatic liver diseases. Forty eight children with established cholestatic liver disease who referred to gastrointestinal clinic of Children Medical Center (Tehran, Iran) between April 2010 and March 2011 were enrolled in a cross-sectional study. Laboratory analysis including calcium, phosphate, albumin, total and direct bilirubin, aminotransferases, alkalinephosphatase (ALP), prothrombin time (PT), parathyroid hormone (PTH), total protein determined by routine laboratory techniques. Mean age of participants was 299.1 ± 676.8 days (range 2-3600 days) whereas twenty one were female (43.8%) and 27 (56.3%) were male. Twenty two (45.8%) had evidences of rickets in X-ray evaluation. Three children with rickets and two with normal X-ray had Vitamin D deficiency while ten in rickets group and 16 in normal group had Vitamin D insufficiency. The main underlying diseases were anatomical biliary atresia in cases with rickets and idiopathic in other group. Rickets and Vitamin D deficiency should be considered in chronic cholestatic children.

Published
2012

38. Probiotics for the treatment of pediatric helicobacter pylori infection: a randomized double blind clinical trial

Author

Khodadad, A., Farahmand, F., Najafi, M., and maryam shoaran

Subjects
Original Article, Endoscopy, Probiotic, Children, Helicobacter Pylori, Eradication
Abstract

Objective Helicobacter pylori is recognized as a major etiological factor in the pathogenesis of gastritis and peptic ulcer disease. H. Pylori eradication has a failure rate of more than 30% in pediatric patients, particularly because of poor compliance, antibiotic resistance and occurrence of side-effects. This study was aimed to determine whether adding the probiotics to a standard anti-H. pylori regimen could minimize the gastrointestinal side-effect prevalence and improve the eradication rate. Methods Double-blind randomized placebo controlled study conducted at Children's Medical Center in Tehran, Iran. Sixty six H. pylori positive children were treated with a triple drug treatment protocol (omeprazole+amoxycillin+furazolidon) and randomly allocated to receive either probiotic or placebo. All patients underwent esophagogastroduodendoscopy. H. pylori infection was diagnosed by either rapid urease test (RUT) or histology. H. pylori status was assessed after 4-8 weeks of the completion of treatment with stool H. pylori antigen test. The side effects of the treatment were determined in each group. Findings Mean age of patients was 9.09 (range 3-14) years, 44 (65.7%) patients were boys (sex ratio 2:1). All 66 patients completed the course of treatment and follow-up. The rate of H. pylori eradication was significantly higher in probiotic group (P=0.04). In probiotic supplemented children there was a lower rate of nausea/vomiting (P=0.02) and diarrhea (P=0.039) during treatment. Conclusion This study showed that probiotics have positive effect on the eradication of H. pylori infection. Adjuvant therapy with probiotic is recommended in order to reduce the frequency of antibiotic induced side-effects during treatment with antibiotics.

Published
2012

42. Design and evaluation of a novel triaxial isometric trunk muscle strength measurement system.

Author

Azghani MR, Farahmand F, Meghdari A, Vossoughi G, Parnianpour M, Azghani, M R, Farahmand, F, Meghdari, A, Vossoughi, G, and Parnianpour, M

Abstract

Maximal strength measurements of the trunk have been used to evaluate the maximum functional capacity of muscles and the potential mechanical overload or overuse of the lumbar spine tissues in order to estimate the risk of developing musculoskeletal injuries. A new triaxial isometric trunk strength measurement system was designed and developed in the present study, and its reliability and performance was investigated. The system consisted of three main revolute joints, equipped with torque sensors, which intersect at L5-S1 and adjustment facilities to fit the body anthropometry and to accommodate both symmetric and asymmetric postures in both seated and standing positions. The dynamics of the system was formulated to resolve validly the moment generated by trunk muscles in the three anatomic planes. The optimal gain and offset of the system were obtained using deadweights based on the least-squares linear regression analysis. The R2 results of calibration for all loading courses of all joints were higher than 0.99, which indicated an excellent linear correlation. The results of the validation analysis of the regression model suggested that the mean absolute error and the r.m.s. error were less than 2 per cent of the applied load. The maximum value of the minimum detectable change was found to be 1.63 Nm for the sagittal plane torque measurement, 0.8 per cent of the full-scale load. The trial-to-trial variability analysis of the device using deadweights provided intra-class correlation coefficients of higher than 0.99, suggesting excellent reliability. The cross-talk analysis of the device indicated maximum cross-talks of 1.7 per cent and 3.4 per cent when the system was subjected to flexion-extension and lateral bending torques respectively. The trial-to-trial variability of the system during in-vivo strength measurement tests resulted in good to excellent reliability, with intra-class correlation coefficients ranging from 0.69 to 0.91. The results of the maximum voluntary isometric torques exertion measurements for 30 subjects indicated good agreement with the previously published data in the literature. The extensive capabilities and high reliability of the system are promising for more comprehensive investigations on the trunk biomechanics in future, e.g. isometric strength measurement at symmetric and asymmetric postures, muscle endurance, and recruitment pattern analysis. [ABSTRACT FROM AUTHOR]

Published
2009

43. A meshless method to simulate interactions between large soft tissue and a surgical grasper.

Author

Nooshabadi, Z. Saghaei, Abdi, E., Farahmand, F., Narimani, R., and Chizari, M.

Subjects
ABDOMINAL surgery, MEDICAL simulation, MESHFREE methods, FINITE element method, LAPAROSCOPIC surgery
Abstract

Realistic simulation of tool-tissue interactions can help to develop more effective surgical training systems and simulators. This study uses a finite element and meshless modeling approach to simulate the grasping procedure of a large intra-abdominal organ, i.e. a kidney, during laparoscopic surgery. Results indicate that the accuracy of the meshless method is comparable with that of the finite element method, with root mean square errors in the range of 0.8 to 2.3 mm in different directions. For the model presented in this study, the computational cost of the meshless method was much less than that of the finite element model. [ABSTRACT FROM AUTHOR]

Published
2016
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