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Santosh Kumar,Shivanshu Singh,Navneet Kumar 대한비뇨의학회 2016 Investigative and Clinical Urology Vol.57 No.2
We describe a case of a solitary functioning kidney with giant hydronephrosis secondary to ureteropelvic junction obstruction in a young girl who underwent successful robot-assisted tubularized flap pyelovesicostomy. The aim of this report was to highlight the feasibility and efficacy of this technique in salvaging such renal moieties and to present a brief review of the surgical options available for the management of giant hydronephrosis.
Santosh Kumar Singh,Ashok Kumar,Mahavir Singh Griwan,Jyotsna Sen 대한비뇨의학회 2012 Investigative and Clinical Urology Vol.53 No.8
Purpose: Controversy exists over the pain during prostate biopsy. Periprostatic nerve block is a commonly used anaesthetic technique during transrectal ultrasound (TRUS)-guided prostate biopsy. The recent trend toward increasing the number of cores has become popular. This practice further increases the need for a proper anaesthetic application. We compared the efficacy of periprostatic nerve block with or without intraprostatic nerve block. Materials and Methods: We conducted a prospective double-blinded placebo-controlled study at our institute with 142 consecutive patients. Patients were randomly assigned into 3 groups. Group 1 received periprostatic nerve block with intraprostatic nerve block with 1% lignocaine. Group 2 patients were administered periprostatic nerve block only with 1% lignocaine. Group 3 received no anaesthesia. Patients were asked to grade their level of pain by using an 11-point linear analogue scale at the time of ultrasound probe insertion, at the time of anaesthesia, during biopsy, and 30 minutes after biopsy. Results: The study groups were comparable in demographic profile, prostate-specific antigen (PSA) level, and prostate size. The mean pain scores at the time of biopsy in groups 1, 2, and 3 were 2.70, 3.39, and 4.16, respectively. Group 1 recorded the minimum mean pain score of 2.70 during prostate biopsy, which was significantly lower than the scores of groups 2 and 3 (p<0.001). There were no significant differences in pain scores among the 3 groups during probe insertion, during anaesthesia, or at 30 minutes after biopsy (p>0.05). Conclusions: Periprostatic nerve block with intraprostatic nerve block provides better pain control than does periprostatic nerve block alone in TRUS-guided prostate biopsy. Purpose: Controversy exists over the pain during prostate biopsy. Periprostatic nerve block is a commonly used anaesthetic technique during transrectal ultrasound (TRUS)-guided prostate biopsy. The recent trend toward increasing the number of cores has become popular. This practice further increases the need for a proper anaesthetic application. We compared the efficacy of periprostatic nerve block with or without intraprostatic nerve block. Materials and Methods: We conducted a prospective double-blinded placebo-controlled study at our institute with 142 consecutive patients. Patients were randomly assigned into 3 groups. Group 1 received periprostatic nerve block with intraprostatic nerve block with 1% lignocaine. Group 2 patients were administered periprostatic nerve block only with 1% lignocaine. Group 3 received no anaesthesia. Patients were asked to grade their level of pain by using an 11-point linear analogue scale at the time of ultrasound probe insertion, at the time of anaesthesia, during biopsy, and 30 minutes after biopsy. Results: The study groups were comparable in demographic profile, prostate-specific antigen (PSA) level, and prostate size. The mean pain scores at the time of biopsy in groups 1, 2, and 3 were 2.70, 3.39, and 4.16, respectively. Group 1 recorded the minimum mean pain score of 2.70 during prostate biopsy, which was significantly lower than the scores of groups 2 and 3 (p<0.001). There were no significant differences in pain scores among the 3 groups during probe insertion, during anaesthesia, or at 30 minutes after biopsy (p>0.05). Conclusions: Periprostatic nerve block with intraprostatic nerve block provides better pain control than does periprostatic nerve block alone in TRUS-guided prostate biopsy.
Santosh Kumar,Shivanshu Singh,Siddharth Jain,Girdhar Singh Bora,Shrawan Kumar Singh 대한비뇨의학회 2015 Investigative and Clinical Urology Vol.56 No.10
Renal cell carcinoma associated with fused ectopic kidneys has rarely been reported in the literature. Here we report the first case of robot-assisted heminephrectomy for chromophobe renal cell carcinoma in an L-shaped fused ectopic kidney. The present case report highlights the importance of three-dimensional vision and enhanced maneuverability with the EndoWrist technology of the robotic surgical system for precise dissection. This report also highlights the importance of preoperative contrast-enhanced computed tomography with three-dimensional arterial reconstruction for surgical planning.
Santosh Kumar,Shivanshu Singh,Nitin Garg 대한비뇨의학회 2015 Investigative and Clinical Urology Vol.56 No.4
Right double inferior vena cava with obstructed retrocaval ureter is an extremely rare anomaly with only a few reported cases in the literature. To the best of our knowledge, this is the first case report describing ureteric repair by use of a single-incision laparoscopic technique. In addition, this report addresses the underlying surgical challenges of this repair and provides a brief review of the embryology of this anomaly. The “Santosh Postgraduate Institute ureteric tacking fixation technique” provides ease of end-to-end uretero-ureteric anastomosis in a single-incision laparoscopic surgery.
( Thakur Santosh Singh ),김건중 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
A wide variety of highly selective asymmetric reactions catalyzed by chiral (salen) metal complexes have been disclosed over the past decade. The solvent free hydrolytic kinetic resolution (HKR) of terminal epoxides catalyzed by a new chiral (salen) Co: AlCl3 complex is described. The catalyst shows high reactivity and selectivity in good yields of > 98 % ee under ambient condition within 1 h.
Thakur, Santosh Singh,Chen, Shu-Wei,Li, Wenji,Shin, Chang-Kyo,Kim, Seong-Jin,Koo, Yoon-Mo,Kim, Geon-Joong Elsevier 2006 Journal of organometallic chemistry Vol.691 No.9
<P><B>Graphical abstract</B></P><P>Dinuclear chiral salen complexes bearing Lewis acid of group 13 metals catalyze asymmetric ring opening of various terminal epoxides with myriad of nucleophiles via kinetic resolution. The complexes are also found to be active for asymmetric cyclization reaction too.</P><ce:figure></ce:figure> <P><B>Abstract</B></P><P>A new dinuclear chiral Co(salen) complexes bearing group 13 metals have been synthesized and characterized. The easily prepared complexes exhibited very high catalytic reactivity and enantioselectivity for the asymmetric ring opening of epoxides with H<SUB>2</SUB>O, chloride ions and carboxylic acids and consequently provide enantiomerically enriched terminal epoxides (>99% ee). It also catalyzes the asymmetric cyclization of ring opened product, to prepare optically pure terminal epoxides in one step. The homogeneous dinuclear chiral Co(salen) have been covalently immobilized on MCM-41. The potential benefits of heterogenization include facilitation of catalyst separation and recyclability requiring very simple techniques. The system described is very efficient.</P>
Ajay Pratap Singh,Satparkash Singh,Santosh Kumar Gupta,Vijendra Pal Singh,Bhaskar Sharma,Rajeev Ranjan 대한수의학회 2010 Journal of Veterinary Science Vol.11 No.3
Outer membrane proteins of Pasteurella (P.) multocida have been known to be protective immunogens. Pasteurella lipoprotein E (PlpE) has been reported to be an important cross reactive outer membrane protein in P. multocida. The gene encoding the PlpE of P. multocida serotypes A: 3, B: 2and D: 1 was amplified from the genomic DNA. The amplified products were cloned and the nucleotide sequence was determined. Sequence analysis of the recombinant clones revealed a single open reading frame of 1,011 bp, 1,008 bp and 1,017 bp encoding a protein with a calculated molecular mass of 37.829 kDa, 37.389 kDa and 37.965 kDa for serotypes A:3, B: 2 and D: 1 respectively. The comparison of the plpE sequence in different capsular types revealed a high degree (>90%) of homology. Furthermore, the plpE gene of Haemorhhagic septicaemia causing serotype (B: 2) was expressed in E. coli and recombinant PlpE was strongly immunostained by antiserum against whole cell antigen,indicating that the protein is expressed in vivo.
Santosh Kumar,Kumar Jayant,Swati Agrawal,Shrawan Kumar Singh 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.3
Purpose: To compare the safety and efficacy of tamsulosin and tamsulosin with thephosphodiesterase-5 inhibitor tadalafil in combination with prednisolone as medicalexpulsive therapies for lower ureteric stones. Materials and Methods: Between July 2011 and December 2012, 62 adult patients presentingwith distal ureteric stones sized 5 to 10 mm were randomized equally to treatmentwith tamsulosin (group A) or tamsulosin with tadalafil (group B). Therapy wasgiven for a maximum of 6 weeks. In addition, patients in groups A and B were given5-mg prednisolone once daily (maximum 1 week). The stone expulsion rate, time tostone expulsion, analgesic use, number of hospital visits for pain, follow-up and endoscopictreatment, and adverse effects of the drugs were noted. Statistical analyses weredone by using Student t-test and chi-square test. Results: There was a higher expulsion rate (83.9% in group B and 74.2% in group A)and a lower time to expulsion in both treatment groups than in historical controls usedin earlier studies. However, these results were not statistically significant (p=0.349,p=0.074, respectively). Statistically significant differences were noted in hospitalizationfor colic and analgesic requirement, which were less in group B than in groupA. There were no serious adverse events. Another important finding was improvementin erectile function in group B. Conclusions: Medical expulsive therapy for distal ureteric stones using tamsulosin andtadalafil with prednisolone is safe and efficacious. Also, the prescription of tadalafilin cases of erectile dysfunction with the development of lower ureteric stones may provideadditional advantages.
Novel SVPWM technique for three-level T-type Z-source inverters
Singh, Satwant,Sonar, Santosh The Korean Institute of Power Electronics 2021 JOURNAL OF POWER ELECTRONICS Vol.21 No.2
In this paper, a new SVPWM switching technique, named ZSVM_1TI, has been proposed for a three-level (3L) T-type Z-source inverter (ZSI). ZSVM_1TI is based on three main modifications of the existing PWM techniques for 3L inverters. First, the existing SVPWM of a 3L ZSI has been modified to double the frequency of the null interval. After that, an improved version of the maximum boost control (MBC) has been proposed based on modified SVPWM to eliminate the problem of the sixth frequency ripple components of inductor current with the existing MBC technique of ZSIs. Finally, a new switching pattern of a reduced common-mode voltage (CMV) PWM technique has been proposed to increase the switching frequency of the impedance network so that the size of the passive elements can be reduced. The proposed ZSVM_1TI has been compared with the existing PWM technique in terms of the size of the impedance network, the dc-link utilization, and the inductor current ripple profile. The above-mentioned findings have been successfully validated using theoretical analysis, simulations, and experimental results.