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Thong KM, Jalalonmuhali M, Choo CL, Yee SY, Yahya R, Jeremiah PN, Bavanandan S, Hooi LS. Audit on data accuracy of the Malaysian Dialysis and Transplant Registry (MDTR). Med J Malaysia 2024; 79:234-236. [PMID: 38553931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Diabetes mellitus is the main aetiology of end stage kidney disease (ESKD) in Malaysia. However, there may be concerns of over-reporting of diabetes mellitus as the cause of ESKD in the Malaysian Dialysis and Transplant Registry (MDTR). The objective of this audit is to assess the accuracy of data collected in the MDTR. There were 151 centres/source data providers (SDP) with a total of 1977 patients included in this audit. The audit showed that 80.2% of doctors' records matched the MDTR data. The results were comparable with published validation studies in other countries.
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Affiliation(s)
- K M Thong
- Hospital Raja Permaisuri Bainun, Medical Department, Nephrology Unit, Ipoh, Malaysia.
| | - M Jalalonmuhali
- University of Malaya, Faculty of Medicine, Department of Medicine, Renal Division, Kuala Lumpur, Malaysia
| | - C L Choo
- National Renal Registry, Malaysia
| | - S Y Yee
- Hospital Kuala Lumpur, Nephrology Department, Kuala Lumpur, Malaysia
| | - R Yahya
- Hospital Kuala Lumpur, Nephrology Department, Kuala Lumpur, Malaysia
| | - P N Jeremiah
- KPJ Ampang Puteri Specialist Hospital, Kuala Lumpur, Malaysia
| | - S Bavanandan
- Hospital Kuala Lumpur, Nephrology Department, Kuala Lumpur, Malaysia
| | - L S Hooi
- National Renal Registry, Malaysia
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Tan MH, Wan Mohd Rasis WAK, Hemlata KG, Syakirin SA, Nor Azita AT, Yahya R. The eyes that saw the kidneys. Med J Malaysia 2022; 77:384-387. [PMID: 35638496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Renal involvement in sarcoidosis is very uncommon and often diagnosed through renal biopsy. It is a chronic and multisystem disease with unknown aetiology and can affect all organs of the body with strong predilection to the lungs. Although glucocorticoids are effective in the treatment of sarcoidosis, the mainstay of management includes supportive hydration and prevention of nephrotoxins. We report a case of a young man who was admitted with an ocular and renal impairment secondary to sarcoidosis.
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Affiliation(s)
- M H Tan
- Hospital Kuala Lumpur, Malaysia.
| | | | | | | | | | - R Yahya
- Hospital Kuala Lumpur, Malaysia
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Lu S, Lu S, Yee S, Yahya R, Bavanandan S. POS-136 PRESENTING FEATURES AND OUTCOMES OF PRIMARY FOCAL SEGMENTAL GLOMERULOSCLEROSIS (FSGS) IN HOSPITAL KUALA LUMPUR. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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WAN AHMAD KAMMAL W, Yee S, Yahya R. POS-984 Impact of covid-19 pandemic on Malaysian nephrology fellow training and well-being. Kidney Int Rep 2022. [PMCID: PMC8854807 DOI: 10.1016/j.ekir.2022.01.1025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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CHEE LOONG C, Tay L, Low C, Heng Y, Sim C, Abdul Wahab M, Yee S, Yahya R. POS-117 Pattern of renal disease in adults with native kidney biopsies, in Hospital Kuala Lumpur: a ten-year study. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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WAN AHMAD KAMMAL W, Yee S, Gnanasegaram H, Yahya R. POS-487 MEMBRANOUS NEPHROPATHY AS A MANIFESTATION OF GRAFT-VERSUS-HOST DISEASE. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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TAN M, Yee S, Yahya R, Bavanandan S. POS-967 PUBLIC-PRIVATE PARTNERSHIP TO PROVIDE HAEMODIALYSIS IN COVID-19 END-STAGE KIDNEY DISEASE PATIENTS IN KLANG VALLEY, MALAYSIA. Kidney Int Rep 2022. [PMCID: PMC8854838 DOI: 10.1016/j.ekir.2022.01.1007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Yahya R, Jainandunsing S, Rashid M, van der Zee L, Touw A, de Rooij FWM, Sijbrands EJG, Verhoeven AJM, Mulder MT. HDL associates with insulin resistance and beta-cell dysfunction in South Asian families at risk of type 2 diabetes. J Diabetes Complications 2021; 35:107993. [PMID: 34384708 DOI: 10.1016/j.jdiacomp.2021.107993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 06/23/2021] [Accepted: 07/12/2021] [Indexed: 01/11/2023]
Abstract
OBJECTIVE Dyslipidemia precedes type 2 diabetes (T2D) and worsens with increasing glucose intolerance. First degree relatives of T2D patients have an increased risk to develop dyslipidemia and glucose intolerance. The aim of the present study was to assess the relation between the development of dyslipidemia and glucose intolerance in first-degree relatives of T2D patients. RESEARCH DESIGN AND METHODS Fasting lipoprotein profiles were determined by density gradient ultracentrifugation in T2D patients and their first-degree relatives (42 Caucasians and 33 South Asians), and in 29 normoglycemic controls from non-T2D families. Glucose tolerance, insulin sensitivity index (ISI) and insulin disposition index (DI) were assessed by an extended, frequently sampled oral glucose tolerance test (OGTT), and fractional insulin synthesis rate (FSR) was measured by 13C-leucine enrichment in urinary C-peptide during the OGTT. RESULTS Of the first-degree relatives, 40, 16 and 19 had NGT, prediabetes and T2D, respectively. NGT family members had lower plasma HDL-cholesterol (HDLC) (1.34 ± 0.07 vs 1.58 ± 0.06 mmol/L; p = 0.015), HDL2-C (0.41 ± 0.05 vs 0.57 ± 0.05 mmol/L; p = 0.021) and HDL3-C (0.62 ± 0.03 vs 0.72 ± 0.02 mmol/L; p = 0.043) than controls. HDL2-C levels tended to decrease with increasing glucose intolerance state. In South Asians, buoyant LDL-C levels decreased with increasing glucose intolerance state (p = 0.006). In South Asian families, HDL-C correlated with both ISI and DI (β 0.42; p = 0.04 and β 0.53; p = 0.01, respectively), whereas HDL2-C and HDL3-C levels correlated with DI (β 0.64; p = 0.002 and β 0.57; p = 0.005, respectively). HDL2-C and plasma triglyceride correlated with FSR (β 0.48; p = 0.033 and β -0.50; p = 0.029, respectively). CONCLUSIONS Low HDL2-C and HDL3-C levels are present in NGT first-degree relatives of T2D patients, and HDL2-C tend to decrease further with increasing glucose intolerance. In South Asian families HDL2-C and HDL3-C levels linked predominantly to deteriorating beta cell function.
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Affiliation(s)
- R Yahya
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - S Jainandunsing
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - M Rashid
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - L van der Zee
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - A Touw
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - F W M de Rooij
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - E J G Sijbrands
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
| | - A J M Verhoeven
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands.
| | - M T Mulder
- Department of Internal Medicine, Section Pharmacology, Vascular Medicine, Cardiovascular Research School COEUR, Erasmus MC, University Medical Center Rotterdam, the Netherlands
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Gan CC, Jalalonmuhali M, Nordin NZ, Abdul Wahab MZ, Yahya R, Ng KP, Tan SY, Lim SK. ABO-Incompatible Living-Donor Kidney Transplantation in a Developing Country: A Multicenter Experience in Malaysia. Transplant Proc 2021; 53:856-864. [PMID: 33487455 DOI: 10.1016/j.transproceed.2020.10.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 10/30/2020] [Indexed: 11/28/2022]
Abstract
Malaysia has a low deceased-donor donation rate and has not embarked on a paired kidney exchange program; therefore, ABO-incompatible and HLA-incompatible transplantation remain the main contributor to the sustainability of the national kidney transplantation (KT) program. There were 26 cases of ABO-incompatible KTs performed from 2011 to 2018 in 3 major transplant centers, namely, Hospital Kuala Lumpur, University Malaya Medical Centre, and Prince Court Medical Centre. We collected perioperative and follow-up data through June 2019. The desensitization protocol varies and is center specific: the localized Japanese protocol and Swedish protocol with a target anti-A/B isoagglutinin titer of 16 or 32 on the day of transplant. The induction and tacrolimus-based maintenance protocol was nearly identical. The median follow-up time was 62.3 months (interquartile range, 37.0-79.7). Fifteen subjects had the highest predesensitization anti-A/B titer of ≥32 (57.7%). The acute cellular rejection and antibody-mediated rejection incidence were 12.5% (3 cases) and 8.3% (2 cases), respectively. Patient, graft, and death-censored graft survival rates were 96.2%, 92.3%, and 96.0%, respectively, 1 year post-living-donor KT (LDKT) and 96.2%, 87.2%, and 90.7%, respectively, 5 years post-LDKT. Our experience shows that ABO-incompatible LDKT using a suitable desensitization technique could be a safe and feasible choice for LDKT even with varied desensitization regimens for recipients with relatively high baseline isoagglutinin titers.
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Affiliation(s)
- C C Gan
- Renal Division, Department of Medicine, Faculty of Medicine, University of Malaya, Jalan Universiti, Kuala Lumpur, Wilayah Persekutuan, Kuala Lumpur, Malaysia
| | - M Jalalonmuhali
- Renal Division, Department of Medicine, Faculty of Medicine, University of Malaya, Jalan Universiti, Kuala Lumpur, Wilayah Persekutuan, Kuala Lumpur, Malaysia
| | - N Z Nordin
- Department of Nephrology, Hospital Kuala Lumpur, Ministry of Health Malaysia, Jalan Pahang, Kuala Lumpur, Malaysia
| | - M Z Abdul Wahab
- Department of Nephrology, Hospital Kuala Lumpur, Ministry of Health Malaysia, Jalan Pahang, Kuala Lumpur, Malaysia
| | - R Yahya
- Department of Nephrology, Hospital Kuala Lumpur, Ministry of Health Malaysia, Jalan Pahang, Kuala Lumpur, Malaysia
| | - K P Ng
- Renal Division, Department of Medicine, Faculty of Medicine, University of Malaya, Jalan Universiti, Kuala Lumpur, Wilayah Persekutuan, Kuala Lumpur, Malaysia
| | - S Y Tan
- Department of Nephrology, Prince Court Medical Center, Kuala Lumpur, Malaysia
| | - S K Lim
- Renal Division, Department of Medicine, Faculty of Medicine, University of Malaya, Jalan Universiti, Kuala Lumpur, Wilayah Persekutuan, Kuala Lumpur, Malaysia.
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Lafia-Araga RA, Hassan A, Yahya R, Rahman NA, Salleh FM. Water absorption behavior of heat-treated and untreated red balau saw dust/LDPE composites: Its kinetics and effects on mechanical properties. Journal of Thermoplastic Composite Materials 2019; 32:1408-1426. [DOI: 10.1177/0892705718799823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
The hygroscopic nature of wood limits the use of wood thermoplastic composites (WTC) in outdoor industrial and domestic applications. To reduce this tendency, red balau saw dust was heat treated at 180 and 200°C for 1 h and compounded with Low Density Poly(ethylene) (LDPE) into 20 and 37 wt% and then molded into test specimens by injection molding. Samples were immersed in distilled water at room temperature for 4 months. Heat-treated wood composites showed remarkable water resistance relative to untreated ones. Wood composites made from wood treated at 180 and 200°C exhibited almost similar water absorption pattern. Reduced water absorption of heat-treated wood composites relative to untreated ones indicates that heat treatment has resulted in a degree of modification of the wood. Most of the composites displayed the Fickian mode of water absorption with n values close to 0.5. Also, the diffusion coefficient reduced with wood content in untreated wood composites due to interaction of water with the polar groups in wood through hydrogen bonding. Untreated wood composites exhibited poorer mechanical properties with water immersion as a result of degradation due to moisture. The mechanical properties of the heat-treated wood composites were not adversely affected with water absorption. Therefore, heat treatment can reduce the proneness to water absorption in WTCs and alleviate the detrimental effects on mechanical properties.
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Affiliation(s)
- Ruth A Lafia-Araga
- Department of Chemistry, School of Physical Sciences, Federal University of Technology, Minna, Nigeria
| | - Aziz Hassan
- Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
| | - R Yahya
- Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
| | - N Abd Rahman
- Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
| | - Fauzani Md Salleh
- Chemisty Division, Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur, Malaysia
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Rashid M, Verhoeven A, van der Wiel H, Louter L, Yahya R, van der Zee L, Blommesteijn J, Roeters van Lennep J, Sijbrands E, Mulder M. In Depth Charachterization Of Dyslipidemia Beyond Conventional Lipid Panel In Patients With Type 2 Diabetes. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kluyts HL, le Manach Y, Munlemvo DM, Madzimbamuto F, Basenero A, Coulibaly Y, Rakotoarison S, Gobin V, Samateh AL, Chaibou MS, Omigbodun AO, Amanor-Boadu SD, Tumukunde J, Madiba TE, Pearse RM, Biccard BM, Abbas N, Abdelatif AI, Abdoulaye T, Abd-rouf A, Abduljalil A, Abdulrahman A, Abdurazig S, Abokris A, Abozaid W, Abugassa S, Abuhdema F, Abujanah S, Abusamra R, Abushnaf A, Abusnina S, Abuzalout T, Ackermann H, Adamu Y, Addanfour A, Adeleke D, Adigun T, Adisa A, Adjignon SV, Adu-Aryee N, Afolabi B, Agaba A, Agaba P, Aghadi K, Agilla H, Ahmed B, Ahmed EZ, Ahmed AJ, Ahmed M, Ahossi R, Aji S, Akanyun S, Akhideno I, Akhter M, Akinyemi O, Akkari M, Akodjenou J, AL Samateh A, al Shams E, Alagbe-Briggs O, Alakkari E, Alalem R, Alashhab M, Alatise O, Alatresh A, Alayeb Alayeb M, Albakosh B, Albert F, Alberts A, Aldarrat A, Alfari A, Alfetore A, Algbali M, Algddar A, Algedar H, Alghafoud I, Alghazali A, Alhajj M, Alhendery Alhendery A, Alhoty F, Ali A, Ali Y, Ali A, Alioune BS, Alkassem M, Alkchr M, Alkesa T, Alkilani A, Alkobty Alkobty F, Allaye T, Alleesaib S, Alli A, Allopi K, Allorto N, Almajbery A, Almesmary R, Almisslati S, Almoraid F, Alobeidi H, Swaleh A, Swayeb E, Szpytko A, Taiwo N, Tarhuni A, Tarloff D, Tchaou B, Tchegnonsi C, Tchoupa M, Teeka M, Alomami M, Thakoor B, Theunissen M, Thomas B, Thomas M, Thotharam A, Tobiko O, Torborg A, Tshisekedi S, Tshisola S, Tshitangano R, Alphonsus CS, Tshivhula F, Tshuma H, Tumukunde J, Tun M, Udo I, Uhuebor D, Umeh K, Usenbo A, Uwiteyimbabazi J, Van der Merwe D, Alqawi O, van der Merwe F, van der Walt J, van Dyk D, Van Dyk J, van Niekerk J, van Wyk S, van Zyl H, Veerasamy B, Venter P, Vermeulen A, Alraheem A, Villarreal R, Visser J, Visser L, Voigt M, von Rahden RP, Wafa A, Wafula A, Wambugu P, Waryoba P, Waweru E, Alsabri S, Weideman M, Wise RD, Wynne E, Yahya A, Yahya A, Yahya R, Yakubu Y, Yanga J, Yangazov Y, Yousef O, Alsayed A, Yousef G, Youssouf C, Yunus A, Yusuf A, Zeiton A, Zentuti H, Zepharine H, Zerihun A, Zhou S, Zidan A, Alsellabi B, Zimogo Zié S, Zinyemba C, Zo A, Zomahoun L, Zoobei N, Zoumenou E, Zubia N, Al-Serksi M, Alshareef M, Altagazi A, Aluvale J, Alwahedi H, Alzahra E, Alzarouk M, Al-Zubaidy K, Amadou M, Amadou M, Amanor-Boadu SD, Amer AA, Amisi B, Amuthenu M, Anabah T, Anani F, Anderson P, Andriamampionona A, Andrianina L, Anele A, Angelin R, Anjar N, Antùnez O, Antwi-Kusi A, Anyanwu L, Aribi A, Arowolo O, Arrey O, Ashebir DZ, Assefa S, Assoum G, Athanse V, Athombo J, Atiku M, Atito-Narh E, Atomabe A, Attia A, Aungraheeta M, Aurélia D, Ayandipo O, Ayebale A, Azzaidey H, Babajee N, Badi H, Badianga E, Baghni R, Bahta M, Bai M, Baitchu Y, Baloyi A, Bamuza K, Bamuza M, Bangure L, Bankole O, Barongo M, Barow M, Basenero A, Bashiya L, Basson C, Bechan S, Belhaj S, Ben Mansour M, Benali D, Benamour A, Berhe A, Bertie J, Bester J, Bester M, Bezuidenhout J, Bhagwan K, Bhagwandass D, Bhat K, Bhuiyan M, Biccard BM, Bigirimana F, Bikuelo C, Bilby B, Bingidimi S, Bischof K, Bishop DG, Bitta C, Bittaye M, Biyase T, Blake C, Blignaut E, Blignaut F, BN Tanjong B, Bogoslovskiy A, Boloko P, Boodhun S, Bori I, Boufas F, Brand M, Brouckaert NT, Bruwer J, Buccimazza I, Bula Bula I, Bulamba F, Businge B, Bwambale Y, Cacala S, Cadersa M, Cairns C, Carlos F, Casey M, Castro A, Chabayanzara N, Chaibou M, Chaibva T, Chakafa N, Chalo C, Changfoot C, Chari M, Chelbi L, Chibanda J, Chifamba H, Chikh N, Chikumba E, Chimberengwa P, Chirengwa J, Chitungo F, Chiwanga M, Chokoe M, Chokwe T, Chrirangi B, Christian M, Church B, Cisekedi J, Clegg-Lamptey J, Cloete E, Coltman M, Conradie W, Constance N, Coulibaly Y, Cronje L, Da Silva M, Daddy H, Dahim L, Daliri D, Dambaki M, Dasrath A, Davids J, Davies GL, De Lange J, de Wet J, Dedekind B, Degaulle M, Dehal V, Deka P, Delinikaytis S, Desalu I, Dewanou H, Deye MM, Dhege C, Diale B, Dibwe D, Diedericks B, Dippenaar J, Dippenaar L, Diyoyo M, Djessouho E, Dlamini S, Dodiyi-Manuel A, Dokolwana B, Domoyyeri D, Drummond LW, du Plessis D, du Plessis W, du Preez L, Dube K, Dube N, Dullab K, Duvenhage R, Echem R, Edaigbini S, Egote A, Ehouni A, Ekwen G, Ekwunife N, El Hensheri M, Elfaghi I, Elfagieh M, Elfallah S, Elfiky M, Elgelany S, Elghallal A, Elghandouri M, Elghazal Z, Elghobashy A, Elharati F, Elkhogia AM, Elkhwildi R, Ellis S, Elmadani L, Elmadany H, Elmehdawi H, Elmgadmi A, Eloi H, Elrafifi D, Elsaadi G, Elsaity R, Elshikhy A, Eltaguri M, Elwerfelli A, Elyasir I, Elzoway A, Elzufri A, Enendu E, Enicker B, Enwerem E, Esayas R, Eshtiwi M, Eshwehdi A, Esterhuizen J, Esterhuizen TM, Etuk E, Eurayet O, Eyelade O, Fanjandrainy R, Fanou L, Farina Z, Fawzy M, Feituri A, Fernandes N, Ford L, Forget P, François T, Freeman T, Freeman Y, Gacii V, Gadi B, Gagara M, Gakenia A, Gallou P, Gama G, Gamal M, Gandy Y, Ganesh A, Gangaly D, Garcia M, Gatheru A, Gaya S, Gbéhadé O, Gerbel G, Ghnain A, Gigabhoy R, Giles D, Girmaye G, Gitau S, Githae B, Gitta S, Gobin V, Goga R, Gomati A, Gonzalez M, Gopall J, Gordon CS, Gorelyk O, Gova M, Govender K, Govender P, Govender S, Govindasamy V, Green-Harris J, Greenwood M, Grey-Johnson S, Grobbelaar M, Groenewald M, Grünewald K, Guegni A, Guenane M, Gueye S, Guezo M, Gunguwo T, Gweder M, Gwila M, Habimana L, Hadecon R, Hadia E, Hamadi L, Hammouda M, Hampton M, Hanta R, Hardcastle TC, Hariniaina J, Hariparsad S, Harissou A, Harrichandparsad R, Hasan S, Hashmi H, Hayes M, Hdud A, Hebli S, Heerah H, Hersi S, Hery A, Hewitt-Smith A, Hlako T, Hodges S, Hodgson RE, Hokoma M, Holder H, Holford E, Horugavye E, Houston C, Hove M, Hugo D, Human C, Hurri H, Huwidi O, Ibrahim A, Ibrahim T, Idowu O, Igaga I, Igenge J, Ihezie O, Ikandi K, Ike I, Ikuku J, Ilbarasi M, Ilunga I, Ilunga J, Imbangu N, Imessaoudene Z, Imposo D, Iraya A, Isaacs M, Isiguzo M, Issoufou A, Izquirdo P, Jaber A, Jaganath U, Jallow C, Jamabo S, Jamal Z, Janneh L, Jannetjies M, Jasim I, Jaworska MA, Jay Narain S, Jermi K, Jimoh R, Jithoo S, Johnson M, Joomye S, Judicael R, Judicaël M, Juwid A, Jwambi L, Kabango R, Kabangu J, Kabatoro D, Kabongo A, Kabongo K, Kabongo L, Kabongo M, Kady N, Kafu S, Kaggya M, Kaholongo B, Kairuki P, Kakololo S, Kakudji K, Kalisa A, Kalisa R, Kalufwelu M, Kalume S, Kamanda R, Kangili M, Kanoun H, Kapesa, Kapp P, Karanja J, Karar M, Kariuki K, Kaseke K, Kashuupulwa P, Kasongo K, Kassa S, Kateregga G, Kathrada M, Katompwa P, Katsukunya L, Kavuma K, Khalfallah, Khamajeet A, Khetrish S, Kibandwa, Kibochi W, Kilembe A, Kintu A, Kipng’etich B, Kiprop B, Kissoon V, Kisten TK, Kiwanuka J, Kluyts HL, Knox M, Koledale A, Koller V, Kolotsi M, Kongolo M, Konwuoh N, Koperski W, Koraz M, Kornilov A, Koto MZ, Kransingh S, Krick D, Kruger S, Kruse C, Kuhn W, Kuhn W, Kukembila A, Kule K, Kumar M, Kusel BS, Kusweje V, Kuteesa K, Kutor Y, Labib M, Laksari M, Lanos F, Lawal T, Le Manach Y, Lee C, Lekoloane R, Lelo S, Lerutla B, Lerutla M, Levin A, Likongo T, Limbajee M, Linyama D, Lionnet C, Liwani M, Loots E, Lopez AG, Lubamba C, Lumbala K, Lumbamba A, Lumona J, Lushima R, Luthuli L, Luweesi H, Lyimo T, Maakamedi H, Mabaso B, Mabina M, Maboya M, Macharia I, Macheka A, Machowski A, Madiba TE, Madsen A, Madzimbamuto F, Madzivhe L, Mafafo S, Maghrabi M, Mahamane DD, Maharaj A, Maharaj A, Maharaj A, Mahmud M, Mahoko M, Mahomedy N, Mahomva O, Mahureva T, Maila R, Maimane D, Maimbo M, Maina S, Maiwald DA, Maiyalagan M, Majola N, Makgofa N, Makhanya V, Makhaye W, Makhlouf N, Makhoba S, Makopa E, Makori O, Makupe AM, Makwela M, Malefo M, Malongwe S, Maluleke D, Maluleke M, Mamadou KT, Mamaleka M, Mampangula Y, Mamy R, Mananjara M, Mandarry M, Mangoo D, Manirimbere C, Manneh A, Mansour A, Mansour I, Manvinder M, Manyere D, Manzini V, Manzombi J, Mapanda P, Marais L, Maranga O, Maritz J, Mariwa F, Masela R, Mashamba M, Mashava DM, Mashile M, Mashoko E, Masia O, Masipa J, Masiyambiri A, Matenchi M, Mathangani W, Mathe R, Matola CY, Matondo P, Matos-Puig R, Matoug F, Matubatuba J, Mavesere H, Mavhungu R, Maweni S, Mawire C, Mawisa T, Mayeza S, Mbadi R, Mbayabu M, Mbewe N, Mbombo W, Mbuyi T, Mbuyi W, Mbuyisa M, Mbwele B, Mehyaoui R, Menkiti I, Mesarieki L, Metali A, Mewanou S, Mgonja L, Mgoqo N, Mhatu S, Mhlari T, Miima S, Milod I, Minani P, Mitema F, Mlotshwa A, Mmasi J, Mniki T, Mofikoya B, Mogale J, Mohamed A, Mohamed A, Mohamed A, Mohamed S, Mohamed S, Mohamed T, Mohamed A, Mohamed A, Mohamed A, Mohamed P, Mohammed I, Mohammed F, Mohammed M, Mohammed N, Mohlala M, Mokretar R, Molokoane F, Mongwe K, Montenegro L, Montwedi O, Moodie Q, Moopanar M, Morapedi M, Morulana T, Moses V, Mossy P, Mostafa H, Motilall S, Motloutsi S, Moussa K, Moutari M, Moyo O, Mphephu P, Mrara B, Msadabwe C, Mtongwe V, Mubeya F, Muchiri K, Mugambi J, Muguti G, Muhammad A, Mukama I, Mukenga M, Mukinda F, Mukuna P, Mungherera A, Munlemvo DM, Munyaradzi T, Munyika A, Muriithi J, Muroonga M, Murray R, Mushangwe V, Mushaninga M, Musiba V, Musowoya J, Mutahi S, Mutasiigwa M, Mutizira G, Muturi A, Muzenda T, Mvwala K, Mvwama N, Mwale A, Mwaluka C, Mwamba J, Mwanga H, Mwangi C, Mwansa S, Mwenda V, Mwepu I, Mwiti T, Mzezewa S, Nabela L, Nabukenya M, Nabulindo S, Naicker K, Naidoo D, Naidoo L, Naidoo L, Naidoo N, Naidoo R, Naidoo R, Naidoo S, Naidoo T, Naidu T, Najat N, Najm Y, Nakandungile F, Nakangombe P, Namata C, Namegabe E, Nansook A, Nansubuga N, Nantulu C, Nascimento R, Naude G, Nchimunya H, Ndaie M, Ndarukwa P, Ndasi H, Ndayisaba G, Ndegwa D, Ndikumana R, Ndonga AK, Ndung’u C, Neil M, Nel M, Neluheni E, Nesengani D, Nesengani N, Netshimboni L, Ngalala A, Ngari B, Ngari N, Ngatia E, Ngcobo G, Ngcobo T, Ngorora D, Ngouane D, Ngugi K, Ngumi ZW, Nibe Z, Ninise E, Niyondiko J, Njenga P, Njenga M, Njoroge M, Njoroge S, Njuguna W, Njuki P, Nkesha T, Nkuebe T, Nkuliyingoma N, Nkunjana M, Nkwabi E, Nkwine R, Nnaji C, Notoane I, Nsalamba S, Ntlhe L, Ntoto C, Ntueba B, Nyassi M, Nyatela-Akinrinmade Z, Nyawanda H, Nyokabi N, Nziene V, Obadiah S, Ochieng O, Odia P, Oduor O, Ogboli-Nwasor E, Ogendo S, Ogunbode O, Ogundiran T, Ogutu O, Ojewola R, Ojujo M, Ojuka D, Okelo O, Okiya S, Okonu N, Olang P, Omigbodun AO, Omoding S, Omoshoro-Jones J, Onyango R, Onyegbule A, Orjiako O, Osazuwa M, Oscar K, Osinaike B, Osinowo A, Othin O, Otman F, Otokwala J, Ouanes F, Oumar O, Ousseini A, Padayachee S, Pahlana S, Pansegrouw J, Paruk F, Patel M, Patel U, Patience A, Pearse RM, Pembe J, Pengemale G, Perez N, Aguilera Perez M, Peter AM, Phaff M, Pheeha R, Pienaar B, Pillay V, Pilusa K, Pochana M, Polishchuk O, Porrill OS, Post E, Prosper A, Pupyshev M, Rabemazava A, Rabiou M, Rademan L, Rademeyer M, Raherison R, Rajah F, Rajcoomar M, Rakhda Z, Rakotoarijaona A, Rakotoarisoa A, Rakotoarison SR, Rakotoarison R, Ramadan L, Ramananasoa M, Rambau M, Ramchurn T, Ramilson H, Ramjee RJ, Ramnarain H, Ramos R, Rampai T, Ramphal S, Ramsamy T, Ramuntshi R, Randolph R, Randriambololona D, Ras W, Rasolondraibe R, Rasolonjatovo J, Rautenbach R, Ray S, Rayne SR, Razanakoto F, Reddy S, Reed AR, Rian J, Rija F, Rink B, Robelie A, Roberts C, Rocher A, Rocher S, Rodseth RN, Rois I, Rois W, Rokhsi S, Roos J, Rorke NF, Roura H, Rousseau F, Rousseau N, Royas L, Roytowski D, Rungan D, Rwehumbiza S, Ryabchiy B, Ryndine V, Saaiman C, Sabwa H, Sadat S, Saed S, Salaheddin E, Salaou H, Saleh M, Salisu-Kabara H, Doles Sama H, Samateh AL, Sam-Awortwi W, Samuel N, Sanduku D, Sani CM, Sanyang L, Sarah H, Sarkin-Pawa A, Sathiram R, Saurombe T, Schutte H, Sebei M, Sedekounou M, Segooa M, Semenya E, Semo B, Sendagire C, Senoga S, Senusi F, Serdyn T, Seshibe M, Shah G, Shamamba R, Shambare C, Shangase T, Shanin S, Shefren I, Sheshe A, Shittu O, Shkirban A, Sholadoye T, Shubba A, Sigcu N, Sihope S, Sikazwe D, Sikombe B, Simaga Abdoul K, Simo W, Singata K, Singh A, Singh S, Singh U, Sinoamadi V, Sipuka N, Sithole N, Sitima S, Skinner DL, Skinner G, Smith O, Smits C, Sofia M, Sogoba G, Sohoub A, Sookun S, Sosinska O, Souhe R, Souley G, Souleymane T, Spicer J, Spijkerman S, Steinhaus H, Steyn A, Steyn G, Steyn H, Stoltenkamp HL, Stroyer S. The ASOS Surgical Risk Calculator: development and validation of a tool for identifying African surgical patients at risk of severe postoperative complications. Br J Anaesth 2018; 121:1357-1363. [PMID: 30442264 DOI: 10.1016/j.bja.2018.08.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/19/2018] [Accepted: 08/06/2018] [Indexed: 10/28/2022] Open
Abstract
BACKGROUND The African Surgical Outcomes Study (ASOS) showed that surgical patients in Africa have a mortality twice the global average. Existing risk assessment tools are not valid for use in this population because the pattern of risk for poor outcomes differs from high-income countries. The objective of this study was to derive and validate a simple, preoperative risk stratification tool to identify African surgical patients at risk for in-hospital postoperative mortality and severe complications. METHODS ASOS was a 7-day prospective cohort study of adult patients undergoing surgery in Africa. The ASOS Surgical Risk Calculator was constructed with a multivariable logistic regression model for the outcome of in-hospital mortality and severe postoperative complications. The following preoperative risk factors were entered into the model; age, sex, smoking status, ASA physical status, preoperative chronic comorbid conditions, indication for surgery, urgency, severity, and type of surgery. RESULTS The model was derived from 8799 patients from 168 African hospitals. The composite outcome of severe postoperative complications and death occurred in 423/8799 (4.8%) patients. The ASOS Surgical Risk Calculator includes the following risk factors: age, ASA physical status, indication for surgery, urgency, severity, and type of surgery. The model showed good discrimination with an area under the receiver operating characteristic curve of 0.805 and good calibration with c-statistic corrected for optimism of 0.784. CONCLUSIONS This simple preoperative risk calculator could be used to identify high-risk surgical patients in African hospitals and facilitate increased postoperative surveillance. CLINICAL TRIAL REGISTRATION NCT03044899.
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Affiliation(s)
- H-L Kluyts
- Department of Anaesthesiology, Sefako Makgatho Health Sciences University, Pretoria, Gauteng, South Africa
| | - Y le Manach
- Department of Anesthesia, Michael DeGroote School of Medicine, Faculty of Health Sciences, McMaster University and Population Health Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Perioperative Medicine and Surgical Research Unit, Hamilton, ON, Canada; Department of Clinical Epidemiology and Biostatistics, Michael DeGroote School of Medicine, Faculty of Health Sciences, McMaster University and Population Health Research Institute, David Braley Cardiac, Vascular and Stroke Research Institute, Perioperative Medicine and Surgical Research Unit, Hamilton, ON, Canada
| | - D M Munlemvo
- University Hospital of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - F Madzimbamuto
- Department of Anaesthesia and Critical Care Medicine, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe
| | - A Basenero
- Ministry of Health and Social Services Namibia, Windhoek, Namibia
| | - Y Coulibaly
- Department, Faculté de médicine de Bamako, Bamako, Mali
| | | | - V Gobin
- Ministry of Health and Quality of Life, Jawaharlal Nehru Hospital, Rose Belle, Grand Port, Mauritius
| | - A L Samateh
- Department of Surgery, Edward Francis Small Teaching Hospital, Banjul, Gambia
| | - M S Chaibou
- Department of Anesthesiology, Intensive Care and Emergency, National Hospital of Niamey, Niamey, Niger
| | - A O Omigbodun
- Department of Obstetrics and Gynaecology, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
| | - S D Amanor-Boadu
- Department of Anaesthesia, University College Hospital, Ibadan, Oyo State, Nigeria
| | - J Tumukunde
- Makerere University, Makerere, Kampala, Uganda
| | - T E Madiba
- Department of Surgery, University of KwaZulu-Natal, Durban, KwaZulu-Natal, South Africa
| | - R M Pearse
- Intensive Care Medicine, Queen Mary University of London, London, UK
| | - B M Biccard
- Department of Anaesthesia and Perioperative Medicine, Groote Schuur Hospital, Faculty of Health Sciences, University of Cape Town, Observatory, Western Cape, South Africa.
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Yee S, Abdul Wahab MZ, Visvanathan R, Yahya R, Bavanandan S, Ahmad G. 090 INCIDENCE AND OUTCOME OF PATIENTS WITH ACUTE KIDNEY INJURY IN HOSPITAL KUALA LUMPUR. Kidney Int Rep 2017. [DOI: 10.1016/j.ekir.2017.06.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Arnaud-Neu F, Yahya R, Schwing-Weill M. pH-metric study of the complexation equilibria of alkaline-earth cations with [1]- and [2]- cryptands in methanol. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1986830403] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sim L, Sentanin F, Pawlicka A, Yahya R, Arof A. Development of polyacrylonitrile-based polymer electrolytes incorporated with lithium bis(trifluoromethane)sulfonimide for application in electrochromic device. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.01.098] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hammed WA, Rahman MS, Mahmud HNME, Yahya R, Sulaiman K. Processable dodecylbenzene sulfonic acid (DBSA) doped poly(N-vinyl carbazole)-poly(pyrrole) for optoelectronic applications. Des Monomers Polym 2016; 20:368-377. [PMID: 29491808 PMCID: PMC5784872 DOI: 10.1080/15685551.2016.1271086] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Accepted: 11/25/2016] [Indexed: 11/11/2022] Open
Abstract
A soluble poly (n-vinyl carbazole)–polypyrrole (PNVC–Ppy) copolymer was prepared through oxidative chemical polymerization wherein dodecyl benzene sulfonic acid (DBSA) was used as a dopant to facilitate polymer-organic solvent interaction and ammonium persulfate (APS) was used as an oxidant. Compared with undoped PNVC–Ppy, the DBSA-doped PNVC–Ppy copolymer showed higher solubility in some selected organic solvents. The composition and structural characteristics of the DBSA-doped PNVC–Ppy were determined by Fourier transform infrared, ultraviolet–visible, and X-ray diffraction spectroscopic methods. Field emission scanning electron microscopic method was employed to observe the morphology of the DBSA-doped PNVC–Ppy copolymer. The electrical conductivity of the DBSA-doped PNVC–Ppy copolymer was measured at room temperature. The conductivity increased with increasing concentration of APS oxidant, and the highest conductivity was recorded at 0.004 mol/dm3 APS at a polymerization temperature of −5 °C. The increased conductivity can be explained by the extended half-life of pyrrole free radical at a lower temperature and a gradual increase in chain length over a prolonged time due to the slow addition of APS. Furthermore, the obtained soluble copolymer exhibits unique optical and thermal properties different from those of PNVC and Ppy.
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Affiliation(s)
- W A Hammed
- Faculty of Science, Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
| | - M S Rahman
- Faculty of Science, Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
| | - H N M E Mahmud
- Faculty of Science, Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
| | - R Yahya
- Faculty of Science, Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
| | - K Sulaiman
- Faculty of Science, Department of Physics, University of Malaya, Kuala Lumpur, Malaysia
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Yusuf SNF, Azzahari AD, Selvanathan V, Yahya R, Careem MA, Arof AK. Improvement of N-phthaloylchitosan based gel polymer electrolyte in dye-sensitized solar cells using a binary salt system. Carbohydr Polym 2016; 157:938-944. [PMID: 27988011 DOI: 10.1016/j.carbpol.2016.10.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 10/01/2016] [Accepted: 10/12/2016] [Indexed: 11/18/2022]
Abstract
A binary salt system utilizing lithium iodide (LiI) as the auxiliary component has been introduced to the N-phthaloylchitosan (PhCh) based gel polymer electrolyte consisting of ethylene carbonate (EC), dimethylformamide (DMF), tetrapropylammonium iodide (TPAI), and iodine (I2) in order to improve the performance of dye-sensitized solar cell (DSSC) with efficiency of 6.36%, photocurrent density, JSC of 17.29mAcm-2, open circuit voltage, VOC of 0.59V and fill factor, FF of 0.62. This efficiency value is an improvement from the 5.00% performance obtained by the DSSC consisting of only TPAI single salt system. The presence of the LiI in addition to the TPAI improves the charge injection rates and increases the iodide contribution to the total conductivity and both factors contribute to the increase in efficiency of the DSSC. The interaction behavior between polymer-plasticizer-salt was thoroughly investigated using EIS, FTIR spectroscopy and XRD.
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Affiliation(s)
- S N F Yusuf
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - A D Azzahari
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - V Selvanathan
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - R Yahya
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Centre for Ionics University Malaya, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - M A Careem
- Centre for Ionics University Malaya, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - A K Arof
- Centre for Ionics University Malaya, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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Yahya R, Favari E, Calabresi L, Verhoeven A, Zimetti F, Adorni M, Gomaraschi M, Averna M, Cefalù A, Bernini F, Sijbrands E, Mulder M, Roeters van Lennep J. Lomitapide affects HDL composition and function. Atherosclerosis 2016; 251:15-18. [DOI: 10.1016/j.atherosclerosis.2016.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 05/03/2016] [Accepted: 05/04/2016] [Indexed: 12/23/2022]
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Yusuf SNF, Azzahari AD, Yahya R, Majid SR, Careem MA, Arof AK. From crab shell to solar cell: a gel polymer electrolyte based on N-phthaloylchitosan and its application in dye-sensitized solar cells. RSC Adv 2016. [DOI: 10.1039/c6ra04188d] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chitosan, a biopolymer derived from crab shells which is insoluble in common organic solvents has been converted to the organosoluble N-phthaloylchitosan (PhCh) by reaction with phthalic anhydride in dimethylformamide (DMF).
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Affiliation(s)
- S. N. F. Yusuf
- Department of Chemistry
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
| | - A. D. Azzahari
- Department of Chemistry
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
| | - R. Yahya
- Department of Chemistry
- University of Malaya
- Kuala Lumpur 50603
- Malaysia
- Centre for Ionics University Malaya
| | - S. R. Majid
- Centre for Ionics University Malaya
- Department of Physics
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
| | - M. A. Careem
- Centre for Ionics University Malaya
- Department of Physics
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
| | - A. K. Arof
- Centre for Ionics University Malaya
- Department of Physics
- Faculty of Science
- University of Malaya
- 50603 Kuala Lumpur
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Vongpromek R, Bos S, Ten Kate GJR, Yahya R, Verhoeven AJM, de Feyter PJ, Kronenberg F, Roeters van Lennep JE, Sijbrands EJG, Mulder MT. Lipoprotein(a) levels are associated with aortic valve calcification in asymptomatic patients with familial hypercholesterolaemia. J Intern Med 2015; 278:166-73. [PMID: 25487646 DOI: 10.1111/joim.12335] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVES Lipoprotein(a) [Lp(a)] is an independent risk factor for aortic valve stenosis and aortic valve calcification (AVC) in the general population. In this study, we determined the association between AVC and both plasma Lp(a) levels and apolipoprotein(a) [apo(a)] kringle IV repeat polymorphisms in asymptomatic statin-treated patients with heterozygous familial hypercholesterolaemia (FH). METHODS A total of 129 asymptomatic heterozygous FH patients (age 40-69 years) were included in this study. AVC was detected using computed tomography scanning. Lp(a) concentration and apo(a) kringle IV repeat number were measured using immunoturbidimetry and immunoblotting, respectively. Univariate and multivariate logistic regression were used to assess the association between Lp(a) concentration and the presence of AVC. RESULTS Aortic valve calcification was present in 38.2% of patients, including three with extensive AVC (>400 Agatston units). Lp(a) concentration was significantly correlated with gender, number of apo(a) kringle IV repeats and the presence and severity of AVC, but not with coronary artery calcification (CAC). AVC was significantly associated with plasma Lp(a) level, age, body mass index, blood pressure, duration of statin use, cholesterol-year score and CAC score. After adjustment for all significant covariables, plasma Lp(a) concentration remained a significant predictor of AVC, with an odds ratio per 10-mg dL(-1) increase in Lp(a) concentration of 1.11 (95% confidence interval 1.01-1.20, P = 0.03). CONCLUSION In asymptomatic statin-treated FH patients, plasma Lp(a) concentration is an independent risk indicator for AVC.
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Affiliation(s)
- R Vongpromek
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - S Bos
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - G-J R Ten Kate
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - R Yahya
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - A J M Verhoeven
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - P J de Feyter
- Department of Cardiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - F Kronenberg
- Division of Genetic Epidemiology, Department of Molecular and Clinical Pharmacology, Innsbruck Medical University, Innsbruck, Austria
| | - J E Roeters van Lennep
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - E J G Sijbrands
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
| | - M T Mulder
- Division of Pharmacology Vascular and Metabolic Diseases, Department of Internal Medicine, Rotterdam, The Netherlands
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Vikneswaran R, Syafiq MS, Eltayeb NE, Kamaruddin MN, Ramesh S, Yahya R. A new thio-Schiff base fluorophore with copper ion sensing, DNA binding and nuclease activity. Spectrochim Acta A Mol Biomol Spectrosc 2015; 150:175-180. [PMID: 26046495 DOI: 10.1016/j.saa.2015.05.087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 05/13/2015] [Accepted: 05/20/2015] [Indexed: 06/04/2023]
Abstract
Copper ion recognition and DNA interaction of a newly synthesized fluorescent Schiff base (HPyETSC) were investigated using UV-vis and fluorescent spectroscopy. Examination using these two techniques revealed that the detection of copper by HPyETSC is highly sensitive and selective, with a detection limit of 0.39 μm and the mode of interaction between HPyETSC and DNA is electrostatic, with a binding constant of 8.97×10(4) M(-1). Furthermore, gel electrophoresis studies showed that HPyETSC exhibited nuclease activity through oxidative pathway.
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Affiliation(s)
- R Vikneswaran
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia.
| | - Muhamad Syamir Syafiq
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
| | - Naser Eltaher Eltayeb
- Department of Chemistry, Sciences & Arts College - Rabigh, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Mohd Naqiuddin Kamaruddin
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
| | - S Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia.
| | - R Yahya
- Department of Chemistry, Faculty of Science, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia.
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Akram H, Azari P, Wan Abas WAB, Zain NM, Gan SN, Yahya R, Wong CS, Pingguan-Murphy B. An in-vitro study on the proliferative potential of rat bone marrow stem cells on electrospun fibrous polycaprolactone scaffolds containing micro-hydroxyapatite particles. ACTA ACUST UNITED AC 2014. [DOI: 10.1179/1432891714z.0000000001039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- H. Akram
- Department of Biomedical EngineeringFaculty of Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - P. Azari
- Department of ChemistryFaculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - W. A. B. Wan Abas
- Department of Biomedical EngineeringFaculty of Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - N. M. Zain
- Department of Biomedical EngineeringFaculty of Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - S. N. Gan
- Department of ChemistryFaculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - R. Yahya
- Department of ChemistryFaculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - C. S. Wong
- Department of PhysicsFaculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - B. Pingguan-Murphy
- Department of Biomedical EngineeringFaculty of Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia
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Azari P, Yahya R, Wong CS, Gan SN. Improved processability of electrospun poly[(R)-3-hydroxybutyric acid] through blending with medium-chain length poly(3-hydroxyalkanoates) produced byPseudomonas putidafrom oleic acid. ACTA ACUST UNITED AC 2014. [DOI: 10.1179/1432891714z.0000000001024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- P. Azari
- Department of ChemistryFaculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - R. Yahya
- Department of ChemistryFaculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - C. S. Wong
- Plasma Technology Research CenterPhysics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - S. N. Gan
- Department of ChemistryFaculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Yahya R, Favari E, Bos S, Vongpromek R, van der Zee L, Touw A, Zimetti F, Adorn M, Bernini F, Verhoeven A, Sijbrands E, Mulder M, Roeters van Lennep J. Treatment of a compound heterozygous familial hypercholesterolemia patient with lomitapide. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Affiliation(s)
- M F Z Kadir
- Centre for Ionics University MalayaUniversity of Malaya, Kuala Lumpur 50603, Malaysia
| | - Z Aspanut
- Department of PhysicsUniversity of Malaya, Kuala Lumpur 50603, Malaysia
| | - R Yahya
- Centre for Ionics University MalayaUniversity of Malaya, Kuala Lumpur 50603, Malaysia
| | - A K Arof
- Centre for Ionics University MalayaUniversity of Malaya, Kuala Lumpur 50603, Malaysia
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Sim LH, Gan SN, Chan CH, Kammer HW, Yahya R. Compatibility and conductivity of LiClO4 free and doped polyacrylate – poly(ethylene oxide) blends. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/143307509x440523] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- L. H. Sim
- Faculty of Applied Sciences Universiti Teknologi MARA, 40450 Shah Alam, Malaysia;,
| | - S. N. Gan
- Chemistry Department Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - C. H. Chan
- Faculty of Applied Sciences Universiti Teknologi MARA, 40450 Shah Alam, Malaysia
| | - H. W. Kammer
- Faculty of Applied Sciences Universiti Teknologi MARA, 40450 Shah Alam, Malaysia
| | - R. Yahya
- Chemistry Department Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Huang X, Liang J, Tan H, Yahya R, Ho Y. Effects of Leucaena condensed tannins of differing molecular weights on in vitro CH4 production. Anim Feed Sci Technol 2011. [DOI: 10.1016/j.anifeedsci.2011.04.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sim LH, Gan SN, Chan CH, Yahya R. ATR-FTIR studies on ion interaction of lithium perchlorate in polyacrylate/poly(ethylene oxide) blends. Spectrochim Acta A Mol Biomol Spectrosc 2010; 76:287-292. [PMID: 20444642 DOI: 10.1016/j.saa.2009.09.031] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 08/30/2009] [Accepted: 09/24/2009] [Indexed: 05/28/2023]
Abstract
The interaction behaviours between components of polyacrylate (PAc)/poly(ethylene oxide) (PEO) and lithium perchlorate (LiClO(4)) were investigated in detail by Attenuated Total Reflectance (ATR)-Fourier Transformed Infrared (FTIR) spectroscopy. Solution cast films of the PAc/PEO and PAc/PEO/LiClO(4) were examined. No obvious shifting of the characteristic ether and ester group stretching modes of PEO and PAc was observed, indicating incompatibility of the binary PAc/PEO blend. The spectroscopic studies on the PAc/PEO/LiClO(4) blends reveal that Li(+) ions coordinate individually to the polymer components at the ether oxygen of PEO and the C-O of the ester group of PAc. Frequency changes observed on the nu(C-O-C) and omega(CH(2)) of PEO confirm the coordination between PEO and Li(+) ions resulting in crystallinity suppression of PEO. The absence of experimental evidence on the formation of PEO-Li(+)-PAc complexes suggests that LiClO(4) does not enhance the compatibility of PAc/PEO blend.
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Affiliation(s)
- L H Sim
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia.
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Aziz NA, Majid SR, Yahya R, Arof AK. Conductivity, structure, and thermal properties of chitosan-based polymer electrolytes with nanofillers. POLYM ADVAN TECHNOL 2009. [DOI: 10.1002/pat.1619] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Yahya R, Bavanandan S, Yap YC, Jazilah W, Shaariah W, Wong HS, Lee DG. Report of the Malaysian Registry of Renal Biopsy (MRRB). Med J Malaysia 2008; 63 Suppl C:18-19. [PMID: 19230242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- R Yahya
- Malaysian Registry of Renal Biopsy, 2nd Floor, MMA House, 124, Jalan Pahang, 50286 Kuala Lumpur, Malaysia
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el-Far M, Fouda M, Yahya R, el-Baz H. Serum IL-10 and IL-6 levels at diagnosis as independent predictors of outcome in non-Hodgkin’s lymphoma. J Physiol Biochem 2004; 60:253-8. [PMID: 15957243 DOI: 10.1007/bf03167070] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Interleukin 10 (IL-10) and interleukin 6 (IL-6) are widely investigated in solid tumors as being important prognostic factors. IL-10 and IL-6 serum levels were measured by enzyme-linked immunosorbent assay from sera taken from 40 non-Hodgkin's lymphoma (NHL) patients before and after treatment and from 20 healthy controls. The patients had been observed for at least 18 months or until death. IL-10 and IL-6 were significantly higher in NHL patients compared to controls. IL-6 was correlated with IL-10 (r = 0.451) and with B symptoms (weight loss > 10% during the last 6 months, unexplained fever and night sweats) (r = 0.447). IL-10 and IL-6 were significantly higher in non survival compared to survival group. High pretreatment IL-10 and IL-6 was associated with poor overall survival. These results show that IL-10 and IL-6 levels are elevated in NHL patients and seem to suggest that simultaneous elevation of IL-10 and IL-6 is a powerful negative prognostic parameter in NHL.
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Affiliation(s)
- M el-Far
- Biochemistry Div., Faculty of Science, Mansoura University, Egypt.
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Hammouda GE, Yahya R, Atallah MM. Plasma bupivacaine concentrations following epidural administration in kidney transplant recipients. Reg Anesth 1996; 21:308-11. [PMID: 8837188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND AND OBJECTIVE The typical hemodynamic and biochemical characteristics of kidney transplant recipients may influence the pharmacokinetic profile of bupivacaine following its epidural administration. The objective of this study was to test this hypothesis in kidney transplant recipients compared with kidney surgery patients. METHODS In a prospective open comparative study, 10 kidney transplant recipients and 10 kidney surgery patients received bupivacaine by the lumbar epidural route during the course of their operations. Arterial blood sampling was carried out before administration of bupivacaine and at 2, 5, 10, 15, 20, 25, 30 minutes and subsequently at 1, 1.5, 2, 4, 8, and 24 hours, after its administration. RESULTS The calculated pharmacokinetic variables did not show any significant difference between the two groups. CONCLUSIONS Lumbar epidural administration of bupivacaine is not associated with higher plasma bupivacaine concentrations in kidney transplant recipients than in nonuremic patients undergoing kidney surgery.
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Affiliation(s)
- G E Hammouda
- Department of Anesthesia, Faculty of Medicine, University of Mansoura, Egypt
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Abstract
We have examined the use of different pre-surgical analgesic techniques in 30 children aged 2-10 yr undergoing repair of hypospadias. They were allocated randomly, in a double-blind, placebo-controlled study, to receive one of three analgesic techniques (n = 10): lumbar extradural analgesia using 0.5% bupivacaine 1 mg kg-1 plus morphine 50 micrograms kg-1; morphine 100 micrograms kg-1 i.m.; or subpubic block using 0.5% bupivacaine 0.5 mg kg-1 for each side. Analgesics were given after induction of anaesthesia and before the start of surgery. Children given extradural analgesia had more stable haemodynamic variables and smaller catecholamine concentrations and needed less anaesthetic supplementation, with no analgesic requirement in the postoperative period. Nausea or vomiting were not reported in children given subpubic block.
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Affiliation(s)
- M M Atallah
- Faculty of Medicine, University of Mansoura, Mansoura-Egypt
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Attalah MM, Saied MM, Yahya R, Ibrahiem EH. Ketamine anesthesia for short transurethral urologic procedures. Middle East J Anaesthesiol 1993; 12:123-33. [PMID: 8413056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Ketamine (K) is a good analgesic and anesthetic agent in short procedures, but the associated cardiovascular responses and emergence reactions limit its use. Benzodiazepines have been used to improve recovery with favourable reports for midazolam (M). Methylphenidate (MPH), the mild CNS stimulant, improves behaviour and mental concentration and can be used to improve recovery from K anesthesia. This was tested, alone and in combination with M by a double-blind study in 30 patients subjected to short transurethral urologic procedures. Patients were randomized into 3 equal groups to receive K-MPH, K-M or K-M-MPH. M (7.5 mg) was mixed with K and MPH (20 mg) was given at the end of urologic procedures. Perioperative monitoring included pulse rate, blood pressure, ECG, and plasma catecholamines. Recovery was assessed by a triad VAS and recovery area was calculated. Distribution-free statistics were used to assess intergroup differences of similar variables. Ketamine produced satisfactory anesthesia for short transurethral urologic procedures. Addition of M did not change the cardiovascular responses of K but resulted in smooth recovery with no changes in the recovery scores. MPH did not improve the recovery scores but increased the incidence of vomiting, excessive talking, and limb movements.
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Affiliation(s)
- M M Attalah
- Urology and Nephrology Center, Univ. of Mansoura, Egypt
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