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Kumkum Gupta,Bhawana Rastogi,Prashant K Gupta,Ivesh Singh,Vijendra Pal Singh,Manish Jain 대한마취통증의학회 2016 Korean Journal of Anesthesiology Vol.69 No.6
Background: Modified radical mastectomy is associated with appreciable blood loss, while endotracheal intubation leads to elevated hemodynamic responses. The present study aimed to evaluate the clinical efficacy of dexmedetomidine infusion as an anesthetic adjuvant to general anesthesia during modified radical mastectomy with I-Gel. Methods: Sixty adult consenting female patients, of American Society of Anesthesiologists physical status 1 to 2 and aged 4,065 years, were blindly randomized into two groups of 30 patients each. The patients in Group I received intravenous dexmedetomidine at a loading dose of 1 μg/kg over 10 min, followed by maintenance infusion of 0.4 to 0.7 μg/kg/h, while patients in Group II were administered an identical amount of saline infusion until 15 min prior to the end of surgery. The primary end point was bleeding at the surgical field and hemodynamic changes; requirement of isoflurane, intraoperative fentanyl consumption and recovery time were assessed as secondary outcomes. Results: The patients receiving dexmedetomidine infusion showed significantly less bleeding at the surgical field (P < 0.05). A statistically significant reduction was also observed in the percentage of isoflurane required (0.82 ± 0.80%) to maintain the systolic blood pressure between 100 and 110 mmHg in patients receiving dexmedetomidine infusion compared with the Group II (1.50 ± 0.90%). The mean intraoperative fentanyl consumption in patients in the Group I was also significantly lower compared with that of the Group II (38.43 ± 5.40 μg vs. 75.12 ± 4.60 μg). The mean recovery time from anesthesia did not show any clinically significant difference between the groups. Conclusions: Dexmedetomidine infusion can be used safely to decrease the bleeding at the surgical field with smooth recovery from anesthesia.
Manish Kundanmal Kothari,Samir Surendranath Dalvie,Santosh Gupta,Agnivesh Tikoo,Deepak Kumar Singh 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.2
Study Design: Retrospective radiological study. Purpose: We aimed to determine the prevalence of ponticulus posticus (PP) and high-riding vertebral artery (HRVA) occurring simultaneously on the same side (PP+HRVA) and in cases of PP+HRVA, to assess C2 radio-anatomical measurements for C2 pars length, pedicle width, and laminar thickness. Overview of Literature: PP and HRVA predispose individuals to vertebral artery injuries during atlantoaxial fixation. In cases of PP+HRVA, the construct options thus become limited. Methods: Consecutive computed tomography scans (n=210) were reviewed for PP and HRVA (defined as an internal height of <2 mm and an isthmus height of <5 mm). In scans with PP+HRVA, we measured the ipsilateral pedicle width, pars length, and laminar thickness and compared them with controls (those without PP or HRVA). Results: PP was present in 14.76% and HRVA in 20% of scans. Of the 420 sides in 210 scans, PP+HRVA was present on 13 sides (seven right and six left). In scans with PP+HRVA, the C2 pars length was shorter compared with controls (13.69 mm in PP+HRVA vs. 20.65 mm in controls, p<0.001). The mean C2 pedicle width was 2.53 mm in scans with PP+HRVA vs. 5.83 mm in controls (p<0.001). The mean laminar thickness was 4.92 and 5.48 mm in scans with PP+HRVA and controls, respectively (p=0.209). Conclusions: The prevalence of PP+HRVA was approximately 3% in the present study. Our data suggest that, in such situations, C2 pedicle width and pars length create important safety limitations for a proposed screw, whereas the translaminar thickness appears safe for a proposed screw.
( Vikas Gupta ),( Manish Bhandare ),( Vikram Chaudhari ),( Shailesh Shrikhande ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: Pretherapy serum neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR) and lymphocyte to monocyte ratio have been shown to predict prognosis in patients with pancreatic ductal adenocarcinoma (PDAC). The aim of this study was to evaluate whether NLR, PLR and LMR help in predicting survival outcomes in patients with PDAC treated with curative intent surgery and chemotherapy at our center. Methods: A retrospective analysis was done of all operated cases of PDAC who underwent curative resection between 2011 to 2018. The pretherapy NLR, PLR and LMR were calculated and analyzed with respect to pathological and survival outcomes Results: 134 operated patients of PDAC were included in the analysis. 94 patients were operated upfront and 40 following neoadjuvant chemotherapy. The median overall survival and disease free survival was 24 months and 17 months respectively. The 1 and 2-year survival was 77.2% and 48% respectively. The Overall survival for NLR values of less than 2, 2.7 and 5 was 27, 25 and 25 months and for NLR more than 2, 2.7 and 5 was 22, 18 and 17 months respectively and was statistically insignificant . Similarly, the PLR and LMR were not significant for a cut off of 150 and 2.8 respectively. On univariate analysis only stage of disease was found to have significant correlation with survival Conclusions: The NLR, PLR and LMR do not correlate with survival in patients with pancreatic ductal adenocarcinomas in this study.
Vaibhav Srivastava,Manish Gupta 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.8
Exploring the self-healing capability in a metallic system, an experimental study was carried out for AA2014 and Nitinolbased smart composites material. The damage produced through the fexural test was healed by thermal heat treatmentthrough compositional healing. The objective of this work is to enhance the recovery in self-healing assessment throughdiferent hardening processes. Strengthening model (solution hardening and age hardening) as a strength enhancement isemployed on the healed samples (i.e. after heat treatment) to evaluate its efect and impact on diferent healing assessments. Further, XRD analysis was performed to explain how the developed residual stress in the microstructure is responsible inafecting the healing characteristics after each heat treatment processes. The obtained result show about 81.66% recovery incrack depth, 23.92% recovery in ductility, 84.3% recovery in crack width and 27.8% recovery in fexural strength after ageing.
Umrao, Sima,Gupta, Tejendra K.,Kumar, Shiv,Singh, Vijay K.,Sultania, Manish K.,Jung, Jung Hwan,Oh, Il-Kwon,Srivastava, Anchal American Chemical Society 2015 ACS APPLIED MATERIALS & INTERFACES Vol.7 No.35
<P>The electromagnetic interference (EMI) shielding of reduced graphene oxide (MRG), B-doped MRG (BMRG), N-doped MRG (N-MRG), and B-N co-doped MRG (B-N-MRG) have been studied in the Ku-band frequency range (12.8-18 GHz). We have developed a green, fast, and cost-effective microwave assisted route for synthesis of doped MRG. B-N-MRG shows high electrical conductivity in comparison to MRG, B-MRG and N-MRG, which results better electromagnetic interference (EMI) shielding ability. The co-doping of B and N significantly enhances the electrical conductivity of MRG from 21.4 to 124.4 Sm-1 because N introduces electrons and B provides holes in the system and may form a nanojunction inside the material. Their temperature-dependent electrical conductivity follows 2D-variable range hopping (2D-VRH) and Efros-Shldovskii-VRH (ES-VRH) conduction model in a low temperature range (T < 50 K). The spatial configuration of MRG after doping of B and N enhances the space charge polarization, natural resonance, dielectric polarization, and trapping of EM waves by internal reflection leading to a high EMI shielding of -42 dB (-99.99% attenuation) compared to undoped MR.G (-28 dB) at a critical thickness of 1.2 mm. Results suggest that the B-N-MRG has great potential as a candidate for a new type of EMI shielding material useful in aircraft, defense industries, communication systems, and stealth technology.</P>