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1.
Ann Surg ; 2024 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-38841843

RESUMO

OBJECTIVE: The primary objective was to compare the rates of early allograft dysfunction (EAD) in patients undergoing elective adult live donor liver transplantation (ALDLT) with and without graft portal inflow modulation (GIM) for portal hyper-perfusion. The secondary objectives were to compare time to normalization of bilirubin and International Normalized Ratio (INR), day 14 ascitic output more than 1liter, small-for-size syndrome (SFSS), intensive care unit / high dependency unit and total hospital stay, and 90 day morbidity and mortality. BACKGROUND: GIM can prevent EAD in ALDLT patients with portal hyper-perfusion. METHODS: A single-center randomized trial with and without GIM for portal hyper-perfusion by splenic artery ligation (SAL) in ALDLT was performed. After reperfusion, patients with portal venous pressure (PVP)>15 mm Hg with a gradient (PVP - central venous pressure) of ≥ 7 mm Hg and/or portal venous flow (PVF)>250 mL/min/100 grams of liver were randomized into two groups: GIM and No GIM. RESULTS: 75 of 209 patients satisfied the inclusion criteria, and 38 underwent GIM. Baseline PVF and PVP were comparable between the GIM and no GIM groups. SAL significantly reduced the PVF and PVP (P<0.001). There were no differences in the primary and secondary outcomes between the two groups. In the subgroup analysis, with a Graft to Recipient Weight Ratio (GRWR)≤0.8, there were no significant differences in the primary and secondary outcomes. CONCLUSION: SAL significantly decreased PVP and PVF, but did not decrease rates of EAD in adult LDLT.

2.
Ann Surg ; 279(6): 932-944, 2024 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-38214167

RESUMO

OBJECTIVE: To compare intraoperative hemodynamic parameters, blood loss, renal function, and duration of surgery with and without temporary portocaval shunt (TPCS) in live donor liver transplantation (LT) recipients. Secondary objectives were postoperative early graft dysfunction, morbidity, mortality, total intensive care unit, and hospital stay. BACKGROUND: Blood loss during recipient hepatectomy for LT remains a major concern. Routine use of TPCS during LT is not yet elucidated. METHODS: This study is a single-center, open-label, randomized control trial. The sample size was calculated based on intraoperative blood loss. After exclusion, a total of 60 patients, 30 in each arm (TPCS vs no TPCS) were recruited in the trial. RESULTS: The baseline recipient and donor characteristics were comparable between the groups. The median intraoperative blood loss ( P = 0.004) and blood product transfusions ( P < 0.05) were significantly less in the TPCS group. The TPCS group had significantly improved intraoperative hemodynamics in the anhepatic phase as compared with the no TPCS group ( P < 0.0001), requiring significantly less vasopressor support. This led to significantly better renal function as evidenced by higher intraoperative urine output in the TPCS group ( P = 0.002). Because of technical simplicity, the TPCS group had significantly fewer inferior vena cava injuries (3.3 vs 26.7%, P = 0.026) and substantially shorter hepatectomy time and total duration of surgery (529.4 ± 35.54 vs 606.83 ± 48.13 min, P < 0.0001). The time taken for normalization of lactate in the immediate postoperative period was significantly shorter in the TPCS group (median, 6 vs 13 h; P = 0.04). Although postoperative endotoxemia, major morbidity, 90-day mortality, total intensive care unit, and hospital stay were comparable between both groups, tolerance to enteral feed was earlier in the TPCS group. CONCLUSIONS: In live donor LT, TPCS is a simple and effective technique that provides superior intraoperative hemodynamics and reduces blood loss and duration of surgery.


Assuntos
Perda Sanguínea Cirúrgica , Hemodinâmica , Transplante de Fígado , Doadores Vivos , Duração da Cirurgia , Derivação Portocava Cirúrgica , Humanos , Transplante de Fígado/métodos , Masculino , Feminino , Perda Sanguínea Cirúrgica/prevenção & controle , Adulto , Derivação Portocava Cirúrgica/métodos , Pessoa de Meia-Idade , Tempo de Internação , Resultado do Tratamento , Hepatectomia/métodos
3.
Ann Surg ; 278(3): e430-e439, 2023 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-36912445

RESUMO

INTRODUCTION: The aim of the current randomized control trial was to assess the efficacy of donor lifestyle optimization on liver regeneration and outcome following live donor liver transplantation. METHODS: Live liver donors (LLDs) who were fit with no or minimal steatosis were randomized to receive either a customized low-calorie diet with calorie intake equalling their basal requirement along with exercise for 2 weeks before surgery versus to continue their normal routine lifestyle. Primary objectives were the difference in the day of normalization of serum bilirubin and PT-International normalized ratio and the percentage growth of the liver at postoperative day 7 and 14. Secondary objectives were differences in intraoperative liver biopsy, liver-regeneration markers, blood loss, hospital stay, the complication rate in LLDs, and rates of early graft dysfunction (EGD) in recipients. RESULTS: Sixty-two consecutive LLDs were randomized (28 in intervention vs. 34 in control). Baseline parameters and graft parameters were similar in both groups. LLDs in the intervention arm had significantly decreased calorie intake ( P <0.005), abdominal girth ( P <0.005), BMI ( P =0.05), and weight ( P <0.0005). The mean blood loss ( P =0.038), day of normalization of bilirubin ( P =0.005) and International normalized ratio ( P =0.061), postoperative peak aspartate transaminase ( P =0.003), Alanine transaminase ( P =0.025), and steatosis ( P <0.005) were significantly less in the intervention group. There was significantly higher volume regeneration ( P =0.03) in donors in the intervention arm. The levels of TNF-α, IL-6, and IL-10 levels were significantly higher, while the TGF-ß level was lower in donors in the intervention group. The rate of EGD was significantly higher in recipients in the control group ( P =0.043). CONCLUSION: Lifestyle optimization of LLD is simple to comply with, improves liver regeneration in LLDs, and decreases EGD in recipients, thus can enhance donor safety and outcomes in live donor liver transplantation.


Assuntos
Fígado Gorduroso , Transplante de Fígado , Humanos , Regeneração Hepática , Doadores Vivos , Fígado/cirurgia , Fígado Gorduroso/cirurgia , Bilirrubina , Aloenxertos , Estilo de Vida
4.
Langenbecks Arch Surg ; 408(1): 350, 2023 Sep 05.
Artigo em Inglês | MEDLINE | ID: mdl-37670194

RESUMO

INTRODUCTION: The current study aimed to assess the safety of early drain removal after live donor hepatectomy (LDH). METHODS: One hundred eight consecutive donors who met the inclusion criteria were randomized to early drain removal (EDR - postoperative day (POD) 3 - if serous and the drain bilirubin level was less than 3 mg/dl - "3 × 3" rule) and routine drain removal (RDR - drain output serous and less than 100 ml). The primary outcome was to compare the safety. The secondary outcome was to compare the postoperative morbidity. RESULTS: Preoperative, intraoperative, and postoperative parameters except for the timing of drain removal were comparable. EDR was feasible in 46 out of 54 donors (85.14%) and none required re-intervention after EDR. There was significantly better pain relief with EDR (p = 0.00). Overall complications, pulmonary complications, and hospital stay were comparable on intention-to-treat analysis. However, pulmonary complications (EDR - 1.9% vs RDR - 16.3% P = 0.030), overall complications (18.8% vs 36.3%, P = 0.043), and hospital stay (8 vs 9, P = 0.014) were more in the RDR group on per treatment analysis. Bile leaks were seen in three donors (3.7% in the EDR group vs 1.9% in RDR, P = 0.558), and none of them required endo-biliary interventions. Re-exploration for intestinal obstruction was required for 3 donors in RDR (0% vs 5.7%; p = 0.079). CONCLUSION: EDR by the "3 × 3" rule after LDH is safe and associated with better pain relief. On per treatment analysis, EDR was associated with significantly less hospital stay and lower pulmonary and overall complications. CLINICAL TRIAL REGISTRY: Clinical Trials.gov - NCT04504487.


Assuntos
Hepatectomia , Doadores Vivos , Humanos , Projetos Piloto , Fígado , Dor
5.
Langenbecks Arch Surg ; 409(1): 23, 2023 Dec 29.
Artigo em Inglês | MEDLINE | ID: mdl-38157074

RESUMO

BACKGROUND: Post-operative hyperamylasemia (POH) following pancreatoduodenectomy (PD) may play a key role in pathogenesis of post-operative pancreatic fistula (POPF). Aim of the current study was to evaluate efficacy of perioperative administration of indomethacin in preventing POH. METHODS: Single-center, double-blind, randomized controlled trial (RCT) conducted on consecutive patients undergoing PD. Patients received either 100 mg of indomethacin per-rectally at induction of anesthesia or standard care. Primary endpoint was incidence of POH in the two arms. POH was defined as postoperative day (POD) 1 serum amylase (S. amylase) levels greater than the upper limit of normal. RESULTS: After exclusion 44 patients were randomized. The two arms were comparable for preoperative and intraoperative parameters. POH was noted in 20/44 (45.5%) with significantly lower incidence of POH (60.9% vs. 28.6%, p = 0.032) in intervention arm (IA). Median S. amylase, POD 1, 3, and 5 drain amylase, and incidence of clinically relevant POPF (CR-POPF) were lower in IA but failed to reach statistical significance (30.4% vs. 14.3%, p = 0.18). The severity of delayed gastric emptying (DGE) was significantly lower in the IA (grade B/C DGE 23.8% vs. 47.8%, p = 0.023). Evaluation of risk factors for POH showed IA to confer an independent protective effect and increased risk with soft pancreas. CONCLUSION: Perioperative per-rectal indomethacin administration is effective in decreasing the incidence of POH following pancreatoduodenectomy.


Assuntos
Hiperamilassemia , Pancreaticoduodenectomia , Humanos , Pancreaticoduodenectomia/efeitos adversos , Hiperamilassemia/prevenção & controle , Hiperamilassemia/complicações , Pâncreas/cirurgia , Fístula Pancreática/epidemiologia , Fístula Pancreática/etiologia , Fístula Pancreática/prevenção & controle , Fatores de Risco , Amilases , Complicações Pós-Operatórias/epidemiologia
6.
Langenbecks Arch Surg ; 408(1): 24, 2023 Jan 13.
Artigo em Inglês | MEDLINE | ID: mdl-36637500

RESUMO

BACKGROUND: Hepatic artery-related complications (HARC) after live donor liver transplantation (LDLT) is associated with high morbidity and mortality rate. METHODS: Prospectively maintained data from July 2011 to September 2020 was analyzed for etiology, detection, management, and outcome of HARC. RESULTS: Six hundred fifty-seven LDLT (adult 572/pediatrics 85) were performed during the study period. Twenty-one (3.2%) patient developed HARC; 16 (2.4%) hepatic artery thrombosis (HAT) and 5 (0.76%) non-thrombotic hepatic artery complication (NTHAC). Ninety percent (19/21) HARC were asymptomatic and detected on protocol Doppler. Median time to detection was day 4 (range - 1 to 35), which included 18 early (within 7 days) vs 3 late incidents. Only one pediatric patient had HAT. Seven patients underwent surgical revascularization, 11 had endovascular intervention and 3 with attenuated flow required only systemic anticoagulation. All NTHAC survived without any sequelae. Revascularization was successful in 81% (13/16) with HAT. Biliary complications were seen in 5 (23.8%); four were managed successfully. Overall mortality was 14.8% (3/21). The 1-year and 5-year survival were similar to those who did not develop HARC (80.9% vs 84.2%, p = 0.27 and 71.4% vs 75.19%, p = 0.36 respectively) but biliary complications were significantly higher (23.8% vs 14.2%, p = 0.03). On multivariate analysis, clockwise technique of arterial reconstruction was associated with decreased risk of HAT (1.7% vs 4.1% (p value - 0.003)). CONCLUSION: Technical refinement, early detection, and revascularization can achieve good outcome in patients with HARC after LDLT.


Assuntos
Hepatopatias , Transplante de Fígado , Trombose , Adulto , Humanos , Criança , Transplante de Fígado/efeitos adversos , Transplante de Fígado/métodos , Artéria Hepática/cirurgia , Doadores Vivos , Resultado do Tratamento , Estudos Retrospectivos , Hepatopatias/cirurgia , Trombose/etiologia , Trombose/cirurgia
7.
Surg Endosc ; 36(2): 871-880, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-34811584

RESUMO

OBJECTIVE: To acquaint with the presentation and management of the cystic artery aneurysm by enriching the reviewed literature with our own experience. BACKGROUND: Cystic artery pseudoaneurysm is an uncommon entity with varied clinical presentation. Inflammation and trauma are associated with most of the cases. Limited experience with the condition challenges the management of individual cases. MATERIALS AND METHODS: We retrieved all the reported cases of cystic artery pseudoaneurysm, published up to December 2019, from the PubMed database and excluded those arising as postoperative complications. A total of 59 cases were analyzed, and we also included our experience of managing a case of cystic artery pseudoaneurysm. RESULTS: Abdominal pain (77.9%) was the most common presentation followed by upper GI bleed (64.4%), while 19 patients (32.2%) had presented with classic Quincke's Triad. Most of the cases were diagnosed following the rupture of the pseudoaneurysm (n = 49, 83.05%). Fifteen patients presented with shock. Hyperbilirubinemia (59.3%) and anemia (55.9%) were the commonest laboratory findings. Although CT angiogram remains the investigation of choice, a conventional angiogram is the gold standard and sufficed as the definitive management in 20 cases. Cholecystectomy formed the definitive management in the rest of the cases. We successfully managed a middle-aged female patient of cystic artery aneurysm with xanthogranulomatous cholecystitis by open cholecystectomy. CONCLUSION: Cystic artery pseudoaneurysms are amenable to successful management with careful evaluation and timely cholecystectomy or angioembolization or a combination of both.


Assuntos
Falso Aneurisma , Colecistite Aguda , Colecistite , Falso Aneurisma/diagnóstico por imagem , Falso Aneurisma/etiologia , Falso Aneurisma/cirurgia , Colecistectomia , Colecistite/cirurgia , Colecistite Aguda/complicações , Colecistite Aguda/cirurgia , Feminino , Artéria Hepática/cirurgia , Humanos , Pessoa de Meia-Idade
8.
Langenbecks Arch Surg ; 407(4): 1575-1584, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35243535

RESUMO

INTRODUCTION: Potential live liver donors with non-alcoholic steatohepatitis (NASH) are rejected upfront for donation in live donor liver transplantation (LDLT). Herein, we share our experience of the feasibility of live liver donation in donors with NASH after successful donor optimization. MATERIALS AND METHODS: Prospectively collected data of 410 consecutive donor hepatectomies from June 2011 to January 2018 were analyzed. RESULTS: During the study period, NASH was diagnosed histopathologically in 17 donors. Four donors were rejected in view of grade 2 fibrosis on histology. Out of remaining 13 donors, six became eligible for donation following lifestyle changes, dietary modifications, and target weight reduction of ≥5%. Reversal of NASH was confirmed on repeat liver biopsy in all the 6 donors. Five out of 6 underwent right lobe (without MHV) donor hepatectomies, while one had left lobe donation. These donors had significantly higher peak bilirubin levels in the immediate post-operative period as compared to other non-NASH donors (4.00 ± 0.32 vs. 2.57 ± 1.77 mg/dL, p = 0.043). In addition, post-hepatectomy normalization of hyperbilirubinemia, if any, was slower in donors with NASH (7 ± 1.3 vs. 5 ± 1.7 days, p = 0.016). However, none of these donors had post-hepatectomy liver failure. All these donors were discharged after an average hospital stay of 8 ± 1.7 days. Their respective recipients had uneventful post-operative courses without complications. Both the recipients and donors are having satisfactory liver functions after 46.7 ± 10.2 months of follow-up. CONCLUSION: Scrupulous selection of live liver donors with NASH can open a door for expanding the organ pool in LDLT after a successful donor optimization program.


Assuntos
Transplante de Fígado , Hepatopatia Gordurosa não Alcoólica , Hepatectomia , Humanos , Fígado/cirurgia , Doadores Vivos , Hepatopatia Gordurosa não Alcoólica/cirurgia , Coleta de Tecidos e Órgãos
9.
Cluster Comput ; 25(2): 1355-1372, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35068996

RESUMO

Distributed denial of service (DDoS) is an immense threat for Internet based-applications and their resources. It immediately floods the victim system by transmitting a large number of network packets, and due to this, the victim system resources become unavailable for legitimate users. Therefore, this attack is claimed to be a dangerous attack for Internet-based applications and their resources. Several security approaches have been proposed in the literature to protect Internet-based applications from this type of threat. However, the frequency and strength of DDoS attacks are increasing day-by-day. Further, most of the traditional and distributed processing frameworks-based DDoS attack detection systems analyzed network flows in offline batch processing. Hence, they failed to classify network flows in real-time. This paper proposes a novel Spark Streaming and Kafka-based distributed classification system, named by SSK-DDoS, for classifying different types of DDoS attacks and legitimate network flows. This classification approach is implemented using a distributed Spark MLlib machine learning algorithms on a Hadoop cluster and deployed on the Spark streaming platform to classify streams in real-time. The incoming streams consume by Kafka's topic to perform preprocessing tasks such as extracting and formulating features for classifying them into seven groups: Benign, DDoS-DNS, DDoS-LDAP, DDoS-MSSQL, DDoS-NetBIOS, DDoS-UDP, and DDoS-SYN. Further, the SSK-DDoS classification system stores formulated features with their predicted class into the HDFS that will help to retrain the distributed classification approach using a new set of samples. The proposed SSK-DDoS classification system has been validated using the recent CICDDoS2019 dataset. The results show that the proposed SSK-DDoS efficiently classified network flows into seven classes and stored formulated features with the predicted value of each incoming network flow into HDFS.

10.
Liver Transpl ; 27(4): 525-535, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-32767818

RESUMO

Biliary complications (BCs) following living donor liver transplantation (LDLT) can lead to significant morbidity and occasional mortality. The present study describes our experience of the all-knots-outside technique (AKOT) of biliary reconstruction (BR) and its impact on BCs. A retrospective analysis was performed using prospectively collected data of 330 consecutive adult patients undergoing LDLT from July 2011 to February 2018 with a minimal follow-up of 24 months. Only 2.8% required hepaticojejunostomy and were excluded. In an initial 122 patients, BR was performed with the standard technique (ST), and AKOT was performed in the subsequent 208 patients. In the AKOT group, a single anastomosis was attempted even for multiple ducts whenever feasible. A major BC was defined as requiring endoscopic, percutaneous, or surgical interventions. In the AKOT group, significantly more patients received a left lobe graft (5.7% versus 18.3%; P = 0.001), had shorter warm ischemia time (44.6 versus 27 minutes; P < 0.001), and had a left hepatic artery (LHA) in the right lobe that was used for arterial reconstruction (48 [39.3%] versus 122 [58.6%]; P = 0.003). The incidence of BCs in the entire cohort was 47 (14.2%). For the ST versus AKOT groups, the overall BCs (27/122 [22.1%] versus 20/208 [9.6%]; P = 0.003) and major BCs (20.5% versus 6.7%; P < 0.001) decreased significantly. In the multivariate analysis, the number of bile ducts (hazard ratio [HR], 4.18; 95% confidence interval [CI], 1.62-10.78; P = 0.003), number of anastomoses (HR, 2.03; 95% CI, 1.03-4.02; P = 0.04), and technique of anastomosis (HR, 0.36; 95% CI, 0.19-0.68; P = 0.002) predicted BCs. In conclusion, in adult LDLT, with standardization of the donor and recipient surgery, preferential use of LHA for right lobe arterial reconstruction, reduction in the number of anastomoses, and AKOT for BR significantly decreased the incidence of BCs.


Assuntos
Procedimentos Cirúrgicos do Sistema Biliar , Transplante de Fígado , Adulto , Anastomose Cirúrgica/efeitos adversos , Ductos Biliares/cirurgia , Procedimentos Cirúrgicos do Sistema Biliar/efeitos adversos , Humanos , Transplante de Fígado/efeitos adversos , Doadores Vivos , Estudos Retrospectivos
11.
J Indian Assoc Pediatr Surg ; 26(6): 456-458, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34912150

RESUMO

Thyroglossal cyst is the most common congenital neck anomaly in children with equal sex incidence, but papillary carcinoma of the thyroglossal cyst in children is rare with only 10 cases reported so far. Even in adults, the incidence of malignancy in the thyroglossal cyst is only 1%. Most cases are diagnosed following surgery on histopathological examination; there is no consensus on the management owing to this rarity and indolent but unpredictable behavior of thyroid cancers. Here, we present one such rare case.

12.
Surg Endosc ; 34(1): 77-87, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-30859489

RESUMO

BACKGROUND: Perforation is a rare but serious adverse event of endoscopic retrograde cholangiopancreatography (ERCP). The aim of this study was to determine the predictors of morbidity and mortality after surgical management of ERCP-related perforation (EP). METHODS: The records of patients with EP requiring surgical intervention at a tertiary referral center in a 12-year period (2004-2016) were retrospectively analyzed for demography, indications for ERCP, risk factors, timing and type of surgical repair, post-operative course, hospital stay, and outcome. Multiple logistic regression was used to identify the parameters predicting survival. RESULTS: Of 25,300 ERCPs, 380 (1.5%) had EP. Non-operative management was successful in 330 (86.8%) patients. 50 (13.2%) patients were operated for EP. Out of 50, the perforation was detected during ERCP (intra-procedure) in 32 patients (64%). In 30 patients (60%), the surgery was performed within 24 h of ERCP. Twenty patients underwent delayed surgery (after 24 h of ERCP) following the failure of initial non-operative management. The delayed surgery after an unsuccessful medical treatment had a detrimental effect on morbidity, mortality and hospital stay. Post-operative duodenal leak was the only independent predictor of 90-day mortality (p = 0.02, OR = 9.1, 95% CI 1.52-54.64). Addition of T-tube duodenostomy (TTD) to the primary repair for either type I or type II perforations increased post-operative duodenal leak (type I, p = 0.048 and type II; p = 0.001) and mortality (type I, p = 0.009 and type II, p = 0.045). CONCLUSION: Although EP is a rare event, it has a serious impact on morbidity and mortality. Delaying of surgery following failed non-operative management worsens the prognosis. Addition of TTD to the repair is not helpful in these patients.


Assuntos
Colangiopancreatografia Retrógrada Endoscópica/efeitos adversos , Tratamento Conservador , Perfuração Intestinal , Reoperação , Colangiopancreatografia Retrógrada Endoscópica/métodos , Tratamento Conservador/métodos , Tratamento Conservador/estatística & dados numéricos , Diagnóstico Tardio/estatística & dados numéricos , Feminino , Humanos , Perfuração Intestinal/etiologia , Perfuração Intestinal/mortalidade , Perfuração Intestinal/cirurgia , Masculino , Pessoa de Meia-Idade , Mortalidade , Reoperação/métodos , Reoperação/estatística & dados numéricos , Estudos Retrospectivos , Fatores de Risco , Tempo para o Tratamento/estatística & dados numéricos
13.
J Opt Soc Am A Opt Image Sci Vis ; 35(1): A7-A17, 2018 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-29328079

RESUMO

Coherent x-ray diffraction imaging (CXDI) is becoming an important 3D quantitative microscopy technique, allowing structural investigation of a wide range of delicate mesoscale samples that cannot be imaged by other techniques like electron microscopy. Here we report high-resolution 3D CXDI performed on spherical microcomposites consisting of a polymer core coated with a triple layer of nickel-gold-silica. These composites are of high interest to the microelectronics industry, where they are applied in conducting adhesives as fine-pitch electrical contacts-which requires an exceptional degree of uniformity and reproducibility. Experimental techniques that can assess the state of the composites non-destructively, preferably also while embedded in electronic chips, are thus in high demand. We demonstrate that using CXDI, all four different material components of the composite could be identified, with radii matching well to the nominal specifications of the manufacturer. Moreover, CXDI provided detailed maps of layer thicknesses, roughnesses, and defects such as holes, thus also facilitating cross-layer correlations. The side length of the voxels in the reconstruction, given by the experimental geometry, was 16 nm. The effective resolution enabled resolving even the thinnest coating layer of ∼20 nm nominal width. We discuss critically the influence of the weak phase approximation and the projection approximation on the reconstructed electron density estimates, demonstrating that the latter has to be employed. We conclude that CXDI has excellent potential as a metrology tool for microscale composites.

14.
J Anaesthesiol Clin Pharmacol ; 33(4): 524-528, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29416248

RESUMO

BACKGROUND AND AIMS: Desflurane and sevoflurane are inhalational anesthetics which provide stable intraoperative hemodynamics and rapid emergence from anesthesia. Dexmedetomidine is an α2-agonist with sedative and hypnotic effects. We compared recovery following anesthesia with a combination of a continuous intravenous infusion of dexmedetomidine and desflurane or sevoflurane in cases of spine surgeries because no such data are available from India. MATERIAL AND METHODS: It was a single-blind, prospective, randomized study. After institutional ethics committee approval, patients were randomly allocated to one of the two groups of fifty patients each. Group D received desflurane and Group S received sevoflurane, along with dexmedetomidine 0.5 µg/kg/h IV infusion for maintenance of anesthesia. RESULTS AND CONCLUSIONS: Extubation time (ET) in Group D was shorter by 4.2 min than in Group S (10.1 ± 2.2 and 14.2 ± 1.3; P = 0.004). Postoperative recovery, postoperative analgesic, and antiemetic requirement between the groups were comparable The mean dial setting required to maintain the minimum alveolar concentration of 1 intraoperatively was 3.1 for desflurane and 0.7 for sevoflurane.

16.
Opt Express ; 24(10): 10710-22, 2016 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-27409892

RESUMO

Characterization of the wavefront of an X-ray beam is of primary importance for all applications where coherence plays a major role. Imaging techniques based on numerically retrieving the phase from interference patterns are often relying on an a-priori assumption of the wavefront shape. In Coherent X-ray Diffraction Imaging (CXDI) a planar incoming wave field is often assumed for the inversion of the measured diffraction pattern, which allows retrieving the real space image via simple Fourier transformation. It is therefore important to know how reliable the plane wave approximation is to describe the real wavefront. Here, we demonstrate that the quantitative wavefront shape and flux distribution of an X-ray beam used for CXDI can be measured by using a micrometer size metal-coated polymer sphere serving in a similar way as the hole array in a Hartmann wavefront sensor. The method relies on monitoring the shape and center of the scattered intensity distribution in the far field using a 2D area detector while raster-scanning the microsphere with respect to the incoming beam. The reconstructed X-ray wavefront was found to have a well-defined central region of approximately 16 µm diameter and a weaker, asymmetric, intensity distribution extending 30 µm from the beam center. The phase front distortion was primarily spherical with an effective radius of 0.55 m which matches the distance to the last upstream beam-defining slit, and could be accurately represented by Zernike polynomials.

17.
Hepatol Res ; 45(10): E73-81, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25537420

RESUMO

AIM: Presence of portal hypertension (PH) adversely affects perioperative and long-term outcome in patients with post-cholecystectomy benign biliary stricture (PCBBS). Identification of factors related to the development of PH will help to prevent this complication. METHODS: From September 2010 to December 2012, 30 patients with PCBBS were studied prospectively for correlation of portal pressure (PP) with injury repair interval (IRI), biliary pressure (BP), severity of hepatic fibrosis (FS), severity of hepatic inflammation (IS) and obstructive biliary pathology score (OBPS). Appropriate statistical methods employed and P ≤ 0.05 (two-sided) was considered statistically significant. RESULTS: Mean PP, mean BP and median IRI were 19.4 ± 4.74 mmHg, 20.1 ± 3.99 mmHg and 145 days, respectively. Spearman's rank correlation coefficients (P-value) of PP with IRI, FS, IS and OBPS were 0.564 (0.001), 0.502 (0.004), 0.752 (0.0001) and 0.242 (0.19), respectively. Pearson correlation of PP with BP was r = 0.383 (r(2) = 0.146, P = 0.03). Spearman's rank correlation coefficients (P-value) of FS with IS and OBPS were 0.561 (0.003) and 0.371 (0.04), respectively. Spearman's rank correlation coefficient of serum bilirubin with OBPS was 0.550 (P = 0.001). Incidence of PH was 33.3% and mean fall of PP following biliary repair was 6.2 ± 1.98 mmHg (P < 0.0001). CONCLUSION: PP in patients with PCBBS has a good correlation with IS, and a fair correlation with both FS and IRI whereas PP was not directly related to BP and OBPS; further prospective trials are mandatory to confirm this correlation, and to evaluate mechanism of fall in PP following biliary decompression.

18.
Can J Urol ; 21(5): 7449-53, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25347369

RESUMO

INTRODUCTION: To describe the utility of the smartphone camera in patient management in urology. MATERIALS AND METHODS: Clinical scenarios were collected retrospectively in which photographs that were taken on smartphone and transmitted by multimedia messaging service (MMS) served an important role in making a diagnosis and/or helped in the self-monitoring of urologic issues by patients. RESULTS: Scenario 1 - a 39-year-old male that presented to the emergency room (ER) with scrotal pain, bruising, and swelling 1 day after bilateral vasectomy. The on call urologist requested that the ER physician send a photograph of the wound using his smartphone. After examining the photograph, the urologist concluded that the hematoma could be managed conservatively. Scenario 2 - a 40-year-old female who underwent transurethral resection of bladder tumor a month ago and had recurrence of gross hematuria. The surgeon asked the patient to monitor her urine color and to use her smartphone to periodically send a photograph of her urine until it turned clear. CONCLUSIONS: At our institution urology consults have been requested for postoperative patients owning to unfamiliarity with postoperative urology examination. By communicating with the on call urologist through MMS images of incisions or urine color, management of these patients has become more timely and efficient. Smartphone camera use can also decrease the in house time spent by on call residents, thus aiding in conforming to duty hours restrictions. Furthermore, this technology has potential for helping patients monitor their disease course, thus reducing hospital visits, anxiety, and healthcare costs.


Assuntos
Telefone Celular , Fotografação/instrumentação , Consulta Remota/métodos , Urologia/métodos , Adulto , Cor , Feminino , Doenças dos Genitais Masculinos/diagnóstico , Doenças dos Genitais Masculinos/etiologia , Doenças dos Genitais Masculinos/terapia , Hematoma/diagnóstico , Hematoma/etiologia , Hematoma/terapia , Hematúria/urina , Humanos , Masculino , Consulta Remota/instrumentação , Estudos Retrospectivos , Autocuidado , Envio de Mensagens de Texto , Urina , Vasectomia/efeitos adversos
19.
J Orthop Case Rep ; 13(5): 34-38, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37255636

RESUMO

Introduction: Fractures of the radial neck are very uncommon in children, accounting for 5-8.5% of all fractures around the elbow in children, and are sometimes found with dislocation of the elbow joint. Jeffery carefully studied and classified these types of radial neck fractures with displaced radial head into several types. Very few cases with Jeffrey fractures are reported in the literature, and most cases were treated by surgery. Only one case of successful closed reduction and cast and two cases of closed reduction and percutaneous pinning have been reported. Case Report: We report two cases of Jeffery Type 2 fractures treated by an open reduction in an 11-year-old and a 13-year-old boy. We describe the difficulties faced in the reduction of the fracture and the complications that occurred in the patients. Conclusion: Jeffery Type 2 fracture is an uncommon and difficult-to-treat injury with the possible complication of the radial head being turned upside down if treated conservatively. Therefore, prompt recognition and careful reduction are essential in this type of injury.

20.
Cancers (Basel) ; 15(7)2023 Mar 23.
Artigo em Inglês | MEDLINE | ID: mdl-37046601

RESUMO

BACKGROUND: We sought to evaluate rural-urban disparities in patient care experiences (PCEs) among localized prostate cancer (PCa) survivors at intermediate-to-high risk of disease progression. METHODS: Using 2007-2015 Surveillance Epidemiology and End Results (SEER) data linked to Medicare Consumer Assessment of Healthcare Providers and Systems (CAHPS) surveys, we analyzed survivors' first survey ≥6 months post-diagnosis. Covariate adjusted linear regressions were used to estimate associations of treatment status (definitive treatment vs. none) and residence (large metro vs. metro vs. rural) with PCE composite and rating measures. RESULTS: Among 3779 PCa survivors, 1798 (53.2%) and 370 (10.9%) resided in large metro and rural areas, respectively; more rural (vs. large metro) residents were untreated (21.9% vs. 16.7%; p = 0.017). Untreated (vs. treated) PCa survivors reported lower scores for doctor communication (ß = -2.0; p = 0.022), specialist rating (ß = -2.5; p = 0.008), and overall care rating (ß = -2.4; p = 0.006). While treated rural survivors gave higher (ß = 3.6; p = 0.022) scores for obtaining needed care, untreated rural survivors gave lower scores for obtaining needed care (ß = -7.0; p = 0.017) and a lower health plan rating (ß = -7.9; p = 0.003) compared to their respective counterparts in large metro areas. CONCLUSIONS: Rural PCa survivors are less likely to receive treatment. Rural-urban differences in PCEs varied by treatment status.

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