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Surgical Treatment of Osteonecrosis of the Femoral Head Using Minimally Invasive Surgical Drilling and Cancellous Grafting at Brazzaville University Hospital

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Open Journal of Orthopedics 2024年第2期14卷 122-132页

作者： Kevin Parfait Bienvenu Bouhelo-Pam Marius Monka Arnauld Sledje Wilfrid Bilongo Bouyou Regis Perry Massouama Paul Yèlai Ikounga roger bertrand sah mbou Armand Moyikoua Department of Orthopaedic surgery and Traumatology University Hospital of Brazzaville Brazzaville Republic of the Congo Faculty of Health Sciences Marien N’GOUABI University Brazzaville Republic of the Congo

Introduction: Osteonecrosis of the femoral head (ONTF) is a debilitating condition. Several treatments have been proposed with controversial results. The aim of our study was to evaluate treatment by surgical drilling coupled with in situ cancellous grafting. Materials and methods: Our study was a case-control study conducted at Brazzaville University Hospital from 1st January 2018 to 31 December 2023. It compared two groups of patients with ONTF: non-operated (13 patients, 20 hips) and operated (22 patients, 35 hips). We used the visual digital scale (VDS) for pain assessment, the Merle D’Aubigne-Postel (MDP) scoring system for clinical and functional assessment, and the evolution of necrosis. Results: The group of non-operated patients had a mean age of 35.69 ± 3.4 years, no improvement in pain with an EVN above seven at the last recoil and a mean global MDP score falling from 12.7 before offloading to 10.13 at one year. The group of patients operated on had a mean age of 37.86 ± 7.02 years, a significant reduction in pain (p = 0.00004) and a significantly increased MDP score (p = 0.0034). A comparison of the two groups of patients showed significant stabilization of the necrotic lesions in the operated patients (p = 0.00067), with better satisfaction in the same group. Conclusion: Surgical drilling combined with grafting in the treatment of early-stage ONTF has improved progress in our series. The technique is reproducible and less invasive. It has made it possible to delay unfavorable progression and, consequently, hip replacement surgery.

关键词： Hip Osteonecrosis of the Femoral Head Conservative Treatment Surgical Drilling Bone Grafting

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Reoperation for early postoperative complications after gastric cancer surgery in a Chinese hospital

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World Journal of Gastroenterology 2010年第1期16卷 98-103页

作者： Birendra Kumar sah Department of General Surgery Ruijin HospitalShanghai Jiaotong UniversitySchool of MedicineShanghai Institute of Digestive Surgery

AIM:To investigate the occurrence of postoperative complications of gastric cancer surgery,and analyze the potential causes of reoperation for early postoperative complications. METHODS:A total of 1639 patients who underwent radical or palliative gastrectomies for gastric cancer were included in the *** study endpoint was the analysis of postoperative complications in inpatients. RESULTS:About 31%of patients had early postoperative complications,and complications of infection occurred most ***-abdominal hemorrhage and anastomotic leak were the main causes of reoperation,which accounted for about 2.2%.Mortality was 11.1%in the reoperation group,but was only 0.8%in other *** duration of postoperative stay in hospital was significantly longer and the total expenditure was markedly higher in the patients who underwent reoperation(P<0.001).There was no significant association of any available factors in this study with the high rate of ***:Reoperation significantly increases the mortality rate and raises the burden of the surgical *** prospective studies are required to explore the potential risk factors.

关键词： Reoperation Gastric cancer Surgery Postoperative complications

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Does testosterone prevent early postoperative complications after gastrointestinal surgery?

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World Journal of Gastroenterology 2009年第44期15卷 5604-5609页

作者： Birendra Kumar sah Department of General Surgery&Shanghai Institute of Digestive Surgery Rui Jin HospitalShanghai Jiao Tong UniversitySchool of Medicine

AIM:To investigate the role of sex hormones in the early postoperative complications of gastrointestinal diseases. METHODS:A total of 65 patients who underwent operations for gastric and colorectal diseases(mainly malignant diseases)were included in the study. Peripheral venous blood samples were collected at different times for analysis of estradiol,testosterone and *** only study endpoint was analysis of postoperative complications. RESULTS:Patients of both sexes were uniform but postoperative complication rate was significantly higher in female patients(P=0.027).There was no significant association of estradiol and progesterone with postoperative *** levels in complicated patients were significantly lower than in uncomplicated patients(P<0.05).Area under the receiver operating characteristic curve showed that a lower value of testosterone was a predictor for higher complication rate(P<0.05),and a lower value oftestosterone at later times after surgery was a better predictor of complications. CONCLUSION:Patients with low testosterone level were prone to higher postoperative complications,which was evident in both ***,further studies are necessary to support this result.

关键词： Stomach neoplasms Testosterone Sex differences Postoperative complications

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Solitary kinetic Alfven waves in dense plasmas with relativistic degenerate electrons and positrons

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Plasma Science and Technology 2019年第4期21卷 85-93页

作者： Monzurul K AHMED Om P sah Department of Physics Biijhora MahavidyalayaBongaigaon-783380AssamIndia

Propagation of solitary kinetic Alfven waves(KAWs)is investigated in small but finite/3(particle-to-magnetic pressure ratio)collisionless dense plasma whose constituents are non degenerate wann ions,and relativistic degenerate electrons and *** the use of reductive perturbation technique,Kortweg-de Vries equation is derived to obtain small amplitude localized wave solution of *** effects of plasma 0,positron concentration,electron relativistic degeneracy parameter,ion thermal temperature and obliqueness parameter on solitary KAWs are *** results of this theoretical investigation are aimed at elucidating characteristics of kinetic Alfven solitary waves in relativistic degenerate e-p-i plasmas found in dense astrophysical objects specifically neutron stars and white dwarfs.

关键词： solitary kinetic Alfven waves dense plasmas electron-positron-ion plasma,relativistic degenerate plasma reductive perturbation technique

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Solitary kinetic Alfvén waves in a dense electron–positron–ion plasma with degenerate electrons and positrons

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Plasma Science and Technology 2017年第12期19卷 42-49页

作者： Monzurul K AHMED Om P sah Depatment of Physics Birjhora MahavidyalayaBongaigaon-783380AssamIndia

Through the use of a reductive perturbation technique, solitary kinetic Alfvén waves（KAWs） are investigated in a low but finite b（particle-to-magnetic pressure ratio） dense electron–positron–ion plasma where electrons and positrons are degenerate. The degenerate plasma model considered here permits the existence of sub-Alfvénic compressive solitary KAWs. The influence of r（equilibrium positron-to-ion density ratio）, sF（electron-to-positron Fermi temperature ratio）, b and obliqueness parameter lzon various characteristics of solitary KAWs are examined through numerical plots. We have shown that there exists a critical value of lzat which a soliton width attains its maximum value which decreases with an increase in r and *** is also found that solitons with a higher energy propagate more obliquely in the direction of an ambient magnetic field. The results of the present investigation may be useful for understanding low frequency nonlinear electromagnetic wave propagation in magnetized electron–positron–ion plasmas in dense stars. Specifically, the relevance of our investigation to a pulsar magnetosphere is emphasized.

关键词： kinetic Alfvén waves solitons electron–positron–ion plasma degenerate plasma Thomas–Fermi approximation

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Oligospermia due to partial maturation arrest responds to low dose estrogen-testosterone combination therapy resulting in live-birth: a case report

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Asian Journal of Andrology 2002年第4期4卷 307-308页

作者： Purushottam sah Gynecologist Arogya Niketan Private Limited Uttarpara 712 258-Kolkata India

A man having severe oligospermia, due to partial maturation arrest at spermatid stage, was given low dose estrogen-testosterone combination therapy for three months. His sperm count increased enormously, following whi... 详细信息

关键词： Pregnancy Outcome Adult Anabolic Agents Clomiphene Drug Therapy, Combination Female Fertility Agents, Female Humans Male Mesterolone Oligospermia Pregnancy Sexual Maturation Sperm Count Testis Testosterone

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Spatial Variability of Mass Movements in the Satluj Valley,Himachal Pradesh during 1990～2006

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Journal of Mountain Science 2008年第1期5卷 38-51页

作者： Vikram GUPTA M.P.sah Wadia Institute of Himalayan Geology Dehra Dun-24 8 001 (Uttarakhand)

Satluj Valley is known to have a history of landslides and related mass movement activities since the geological times. Geological and geomorphological settings combined with anthropogenic activities constitute a propensity towards slope failure. During the last two decades,the area witnessed substantial increase in athropogenic pressure,mainly due to the exploitation of hydropower potential,changing landuse pattern and population growth. In addition,a shift of the climatic patterns in the form of larger area falling under the influence of rains was observed. These natural as well as anthropogenic changes in the area have resulted in increased spatial coverage of landslide in the area. This paper documents these changes during 1990～2006.

关键词： Landslides Mass movement Satluj Valley Himachal Pradesh India

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MOS Capacitance-Voltage Characteristics:*** to Enhance the Trapping Capacitance

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Journal of Semiconductors 2012年第2期33卷 1-9页

作者： Jie Binbin sah Chihtang Department of Physics Xiamen UniversityXiamen 361005China CTsah Associates GainesvilleFlorida 32605USA

Low-frequency and High-frequency Capacitance-Voltage（C-V） curves of Silicon Metal-Oxide-Semiconductor Capacitors,showing electron and hole trapping at shallow-level dopant and deep-level generation-recombination -trapping impurities,are presented to illustrate the enhancement of the giant trapping capacitances by physical means via device and circuit designs,in contrast to chemical means via impurity characteristics previously *** is realized by masking the electron or/and hole storage capacitances to make the trapping capacitances dominant at the *** and materials properties used in the computed CV curves are selected to illustrate experimental realizations for fundamental trapping parameter characterizations and for electrical and optical signal processing applications.

关键词： MOS silicon trapping capacitance dopant impurities donors acceptors

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MOS Capacitance-Voltage Characteristics:Ⅳ.Trapping Capacitance from 3-Charge-State Impurities

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Journal of Semiconductors 2012年第1期33卷 1-19页

作者： Jie Binbin sah Chihtang Department of Physics Xiamen University Xiamen 361005China CTsah Associates GainesvilleFlorida 32605USA

Metal-Oxide-Semiconductor Capacitance-Voltage （MOSCV） characteristics containing giant carrier trapping capacitances from 3-charge-state or 2-energy-level impurities are presented for not-doped, n-doped, p- doped and compensated silicon containing the double-donor sulfur and iron, the double-acceptor zinc, and the amphoteric or one-donor and one-acceptor gold and silver impurities. These impurities provide giant trapping ca- pacitances at trapping energies from 200 to 800 meV （50 to 200 THz and 6 to 1.5 μm）, which suggest potential sub-millimeter, far-infrared and spin electronics applications.

关键词： multiple charge states trapping capacitance dopant impurity

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Studies of Water V. Five Phonons in Protonic Semiconductor Lattice Model of Pure Liquid Water

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Journal of Semiconductors 2017年第7期38卷 1-17页

作者： Binbin Jie Chihtang sah Department of Physics Xiamen University Xiamen 361005 China Chinese Academy of Sciences Beijing 100864 China

We report physics based confirmation（~1% RMS deviation）, by existing experimental data, of protonprohol（proton-hole） ion product（p H） and mobilities in pure liquid water（0-100℃, 1-atm pressure） anticipated from our melted-ice Hexagonal-Close-Packed（H_2O）_4Lattice Model. Five phonons are identified.（1） A propagating protonic phonon（520.9 meV from lone-pair-blue-shifted stretching mode of isolated water molecule） absorbed to generate a proton-prohol pair or detrap a tightly-bound proton.（2） Two（173.4 and 196.6 meV） bending-breathing protonic-proholic or protonic phonons absorbed during de-trapping-limited proton or proton-prohol mobilities.（3）Two propagating oxygenic-wateric Debye-Dispersive phonons（30.3 and 27.5 meV） absorbed during scatteringlimited proton or proton-prohol mobilities.

关键词： solid, soft and liquid material physics pure water point-mass positive proton and negative prohol pH proton-ion product and mobilities phonon scattering and detrapping-trapping of propagating-localized protons and prohols

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