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Hypotension and Anesthesia

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https://www.readbyqxmd.com/read/28107274/the-sluscore-a-novel-method-for-detecting-hazardous-hypotension-in-adult-patients-undergoing-noncardiac-surgical-procedures
#1
Wolf H Stapelfeldt, Hui Yuan, Jefferson K Dryden, Kristen E Strehl, Jacek B Cywinski, Jesse M Ehrenfeld, Pamela Bromley
BACKGROUND: It has been suggested that longer-term postsurgical outcome may be adversely affected by less than severe hypotension under anesthesia. However, evidence-based guidelines are unavailable. The present study was designed to develop a method for identifying patients at increased risk of death within 30 days in association with the severity and duration of intraoperative hypotension. METHODS: Intraoperative mean arterial blood pressure recordings of 152,445 adult patients undergoing noncardiac surgery were analyzed for periods of time accumulated below each one of the 31 thresholds between 75 and 45 mm Hg (hypotensive exposure times)...
January 19, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28101342/pharmacodynamic-analysis-of-target-controlled-infusion-of-propofol-in-patients-with-hepatic-insufficiency
#2
Jing-Ru Pan, Jun Cai, Shao-Li Zhou, Qian-Qian Zhu, Fei Huang, Yi-Han Zhang, Xin-Jin Chi, Zi-Qing Hei
The effect of liver dysfunction on target-controlled infusion (TCI) of propofol remains poorly documented. The pharmacodynamic performance of propofol TCI was evaluated in a cohort of Chinese patients with hepatic insufficiency. Fifty-three patients with hepatic insufficiency were enrolled in the current prospective, observational study. Anesthesia was induced with propofol via TCI to a plasma concentration of 3 µg/ml. Following loss of consciousness (LOC), fentanyl and cisatracurium were administered. Pharmacodynamic parameters were recorded during TCI, including time to LOC, bispectral index (BIS), heart rate (HR) and blood pressure...
December 2016: Biomedical Reports
https://www.readbyqxmd.com/read/28096583/addition-of-clonidine-to-bupivacaine-in-transversus-abdominis-plane-block-prolongs-postoperative-analgesia-after-cesarean-section
#3
Ranju Singh, Nishant Kumar, Aruna Jain, Sudipta Joy
BACKGROUND AND AIMS: The aim was to compare duration of postoperative analgesia with addition of clonidine to bupivacaine in bilateral transversus abdominis plane (TAP) block after lower segment cesarean section (LSCS). MATERIAL AND METHODS: One hundred American Society of Anesthesiologists (ASA) grade I and II pregnant patients undergoing LSCS under spinal anesthesia were randomly divided to receive either 20 ml bupivacaine 0.25% (Group B; n = 50) or 20 ml bupivacaine+1ug/kg clonidine bilaterally (Group BC; n = 50) in TAP block in a double-blind fashion...
October 2016: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/28096580/randomized-double-blind-comparison-of-remifentanil-and-alfentanil-in-patients-undergoing-laparoscopic-cholecystectomy-using-total-intravenous-anesthesia
#4
José M Beleña, Mónica Núñez, Alfonso Vidal, Diego Anta
BACKGROUND AND AIMS: To compare the use of remifentanil and alfentanil to suppress intraoperative adrenergic response of pain and the influence of these drugs on the recovery profile in patients undergoing laparoscopic cholecystectomy using a total intravenous anesthesia (TIVA) technique. MATERIAL AND METHODS: One hundred patients undergoing elective laparoscopic cholecystectomy were randomized to be managed with either remifentanil (group R) or alfentanil (group A)...
October 2016: Journal of Anaesthesiology, Clinical Pharmacology
https://www.readbyqxmd.com/read/28089598/impact-of-focused-intraoperative-transthoracic-echocardiography-by-anesthesiologists-on-management-in-hemodynamically-unstable-high-risk-noncardiac-surgery-patients
#5
Thomas Kratz, Thorsten Steinfeldt, Maik Exner, Marco Campo Dell Orto, Nina Timmesfeld, Caroline Kratz, Martin Skrodzki, Hinnerk Wulf, Martin Zoremba
OBJECTIVES: Focused transthoracic echocardiography (TTE) is used perioperatively for surgical patients. Intraoperative application of TTE is feasible, but its benefits remain unclear. The intention of this study was to investigate the effect of intraoperative TTE on the management of high-risk noncardiac surgery patients. DESIGN: A prospective interventional study. SETTING: Single-center university hospital. PARTICIPANTS: Fifty consecutive hemodynamically unstable high-risk patients anesthetized for noncardiac surgery...
November 2, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28079763/the-comparison-of-etomidate-and-propofol-anesthesia-in-patients-undergoing-gastrointestinal-endoscopy-a-systematic-review-and-meta-analysis
#6
Limin Ye, Xiangyang Xiao, Liyi Zhu
INTRODUCTION: Etomidate and propofol played an important role in the sedation of patients undergoing gastrointestinal endoscopy. We conducted a systematic review and meta-analysis to compare their efficacy and safety. MATERIALS AND METHODS: PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases were systematically searched. Randomized controlled trials assessing the effect of etomidate versus propofol for the anesthesia of patients undergoing gastrointestinal endoscopy were included...
January 10, 2017: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/28072722/dexmedetomidine-prevent-postoperative-nausea-and-vomiting-on-patients-during-general-anesthesia-a-prisma-compliant-meta-analysis-of-randomized-controlled-trials
#7
Shenhui Jin, Dong Dong Liang, Chengyu Chen, Minyuan Zhang, Junlu Wang
BACKGROUND: Postoperative nausea and vomiting (PONV) is a frequent complication in postoperative period. The aim of this article was to evaluate the effect of dexmedetomidine on PONV. METHOD: RevMan 5.3 software was applied for performing statistic analysis. Twenty-four trials with 2046 patients were included. RESULTS: The PONV of the dexmedetomidine group was significantly lower compared with the placebo group (0.56, 95% CI: 0.46, 0.69). Subgroup analysis further confirmed the effect of dexmedetomidine (irrespective of administration mode) (P < 0...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28070113/pharmacological-characterization-of-microminipig-as-a-model-to-assess-the-drug-induced-cardiovascular-responses-for-non-clinical-toxicity-and-or-safety-pharmacology-studies
#8
Hirofumi Yokoyama, Yuji Nakamura, Hiroyuki Saito, Yukitoshi Nagayama, Kiyotaka Hoshiai, Takeshi Wada, Hiroko Izumi-Nakaseko, Kentaro Ando, Yasuki Akie, Atsushi Sugiyama
We tried to establish the halothane-anesthetized microminipigs as an alternative animal model for non-clinical toxicity and/or safety pharmacology studies. In order to characterize the halothane-anesthetized microminipigs, we firstly clarified the effects of halothane anesthesia on their cardiovascular system (n = 5). Then, we examined the cardiovascular effects of dl-sotalol in doses of 0.1, 0.3 and 1 mg/kg, i.v. on the halothane-anesthetized microminipigs (n = 6). Induction of the halothane anesthesia by itself prolonged the QT interval as well as QTcF, suggesting that the halothane anesthesia can reduce the cardiac repolarization reserve in microminipigs like in dogs...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28040125/preoperative-measurement-of-maternal-abdominal-circumference-relates-the-initial-sensory-block-level-of-spinal-anesthesia-for-cesarean-section-an-observational-study
#9
Chi-Hang Kuok, Chung-Hsin Huang, Pei-Shan Tsai, Yuan-Pi Ko, Wei-Shih Lee, Yung-Wei Hsu, Fang-Yu Hung
OBJECTIVE: Lumbosacral cerebrospinal fluid volume is decreased as the enlarging uterus compresses the inferior vena cava during pregnancy. A subsequent greater cephalad spread of sensory blockade is observed. Gravid uterus plays a crucial role in affecting the spinal anesthesia level. We hypothesized that maternal abdominal circumference can reflect compressive effect of the uterus and investigated the relationship between abdominal circumference and the level of sensory blockade, and incidence of hypotension following spinal anesthesia with hyperbaric bupivacaine in term parturients...
December 2016: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28034287/the-ignored-role-of-intraoperative-hypotension-in-producing-postoperative-acute-kidney-injury-an-obligatory-appeal-for-more-preventative-nephrology
#10
Macaulay Amechi Chukwukadibia Onuigbo, Nneoma Agbasi
Intraoperative hypotension (IOH) invariably follows the induction of general anesthesia. There is this general consensus that IOH is beneficial - less bleeding, less blood transfusions, shorter surgery times - and absent adverse consequences on renal, hepatic and neurological functions. Nevertheless, a critical review of the literature revealed that past research studied younger patients with normal kidney function, short surgery times while excluding patients with advanced CKD and uncontrolled hypertension...
December 29, 2016: Current Hypertension Reviews
https://www.readbyqxmd.com/read/28030871/obesity-and-neonatal-cord-blood-gas-results-at-cesarean-effect-of-intraoperative-blood-pressure
#11
Mark F Powell, Charity J Morgan, Jessica A Cantu, Yasser Sakawi, Joseph R Biggio, Alan T N Tita, Jeff M Szychowski, Rodney K Edwards
Objective Our aims were to evaluate whether there is an inverse association between body mass index (BMI) and umbilical artery pH and to investigate the contribution of intraoperative hypotension on the umbilical artery pH. Study Design We conducted a retrospective cohort study of all women with a nonanomalous singleton at 37 to 41 weeks who underwent a scheduled cesarean delivery under spinal anesthesia at our facility from January 2006 to March 2012. The primary outcome was the proportion of patients in each BMI category with arterial cord pH < 7...
December 28, 2016: American Journal of Perinatology
https://www.readbyqxmd.com/read/28026887/combined-spinal-epidural-anesthesia-with-hypobaric-ropivacaine-in-sitting-position-significantly-increases-the-incidence-of-hypotension-in-parturients-undergoing-cesarean-section
#12
Zhendong Xu, Fuyi Shen, Yueqi Zhang, Yiyi Tao, Xiubing Chen, Zhiqiang Liu
AIM: Maternal position during induction of combined spinal-epidural anesthesia (CSEA) may affect hemodynamics and block characteristics. This study aimed to assess whether the sitting position is more likely to induce hypotension and higher block level than the lateral position in CSEA with hypobaric ropivacaine. METHODS: Ninety American Society of Anesthesiologists physical status I and II parturients undergoing elective cesarean section were randomized into three groups: the sitting, left-lateral, and right-lateral position groups...
December 27, 2016: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28013485/influence-of-saline-based-hydroxyethyl-starch-on-umbilical-cord-blood-electrolytes
#13
Tomoaki Yatabe, Atsushi Nishigaki, Takahiko Tamura, Masataka Yokoyama
Hydroxyethyl starch (HES) is widely used to prevent and treat spinal anesthesia-induced hypotension during cesarean section. However, the use of saline-based HES may lead to hyperchloremia. This study aimed to clarify the effects of saline-based HES on umbilical cord chloride level at delivery. We retrospectively analyzed 93 consecutive single-pregnancy patients who underwent cesarean section with combined spinal-epidural anesthesia. The patients were divided into two groups, depending on the use of 6% HES 130/0...
December 24, 2016: Journal of Anesthesia
https://www.readbyqxmd.com/read/28005566/anesthesia-for-functional-endoscopic-sinus-surgery
#14
Daniel A Carlton, Satish Govindaraj
PURPOSE OF REVIEW: The present article summarizes anesthetic techniques used during functional endoscopic sinus surgery to decrease bleeding and aid in creating a clear surgical field. The applicable physiology behind these anesthetic techniques is reviewed with emphasis on the effect on bleeding and the surgical field. Deliberate hypotension, reverse Trendelenburg positioning, regional anesthesia, and cerebral monitoring are discussed. RECENT FINDINGS: There are mixed data as to whether traditional inhalation anesthesia or total intravenous anesthesia is superior with respect to better surgical fields and decreased blood loss...
February 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28005161/-epidural-anesthesia-for-fetoscopy-retrospective-analysis-of-a%C3%A2-one-year-cohort
#15
N Kiefer, S F Suter, C Berg, U Gembruch, S U Weber
BACKGROUND: The introduction of routine prenatal screening using ultrasound has led to a substantial increase in diagnoses of fetal disorders that are amenable to intrauterine treatment. While an ultrasound guided insertion of small bore cannulas can be performed under local anesthesia, insertion of a fetoscope usually requires anesthetic management for the mother and the fetus. Additionally, the fetus' intrauterine position may have to be manipulated in order to enable access. Such manoeuvres depend on relaxation of the mother's abdominal wall...
December 22, 2016: Der Anaesthesist
https://www.readbyqxmd.com/read/27995106/comparing-prophylactic-effect-of-phenylephrine-and-ephedrine-on-hypotension-during-spinal-anesthesia-for-hip-fracture-surgery
#16
Rahman Abbasivash, Shahryar Sane, Mitra Golmohammadi, Shahram Shokuhi, Fereshteh Danaye Toosi
BACKGROUND: Spinal anesthesia is an accepted technique in hip fracture surgery and prevention of this complication by sympathomimetic agents is of potential clinical significance. The aim of this study is to compare the effect of prophylactic phenylephrine versus ephedrine in the prevention of hypotension during spinal anesthesia in hip fracture surgery. MATERIALS AND METHODS: Ninety-two patients undergoing hip fracture surgery with the American Society of Anesthesiologists I and II were randomized to receive prophylaxis with ephedrine or phenylephrine immediately before the spinal anesthesia...
2016: Advanced Biomedical Research
https://www.readbyqxmd.com/read/27984382/diagnostic-yield-and-complications-of-ebus-tbna-performed-under-bronchoscopist-directed-conscious-sedation-single-center-experience-of-1004-subjects
#17
Sahajal Dhooria, Inderpaul S Sehgal, Nalini Gupta, Ashutosh N Aggarwal, Digambar Behera, Ritesh Agarwal
BACKGROUND: Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) can be performed under either conscious sedation or general anesthesia. Herein, we describe the diagnostic yield and complications of EBUS-TBNA performed under bronchoscopist-directed conscious sedation. METHODS: This is a retrospective analysis of data collected in the bronchoscopy suite of this center on EBUS-TBNA or endoscopic ultrasound with a bronchoscope-guided fine needle aspiration (EUS-B-FNA) procedures performed between July 2011 and January 2016...
January 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/27940069/cardiovascular-effects-of-exogenous-adrenomedullin-and-cgrp-in-ramp-and-calcrl-deficient-mice
#18
J B Pawlak, S E Wetzel-Strong, M K Dunn, K M Caron
Adrenomedullin (AM) and calcitonin gene-related peptide (CGRP) are potent vasodilator peptides and serve as ligands for the G-protein coupled receptor (GPCR) calcitonin receptor-like receptor (CLR/Calcrl). Three GPCR accessory proteins called receptor activity-modifying proteins (RAMPs) modify the ligand binding affinity of the receptor such that the CLR/RAMP1 heterodimer preferably binds CGRP, while CLR/RAMP2 and CLR/RAMP3 have a stronger affinity for AM. Here we determine the contribution of each of the three RAMPs to blood pressure control in response to exogenous AM and CGRP by measuring the blood pressure of mice with genetic reduction or deletion of the receptor components...
December 8, 2016: Peptides
https://www.readbyqxmd.com/read/27935779/treatment-and-prevention-of-spinal-induced-hypotension-in-the-cesarean-section-patient-what-does-the-evidence-say
#19
Joseph E Pellegrini
Most anesthesia providers prefer to do a subarachnoid block (SAB) for cesarean section because of its rapid onset and reliability to provide adequate anesthesia. However an effect of the SAB is that it causes a spinal-induced hypotension (SIH) in up to 85% of the population. There have been multiple studies that assessed fluid administration, vasopressor administration, maternal positioning, or serotonin blockers given prophylactically to attenuate the SIH response. Despite these multiple studies, the method to prevent and treat SIH remains varied from one anesthesia practice to another...
January 2017: Annual Review of Nursing Research
https://www.readbyqxmd.com/read/27910802/near-infrared-spectroscopy-evaluated-cerebral-oxygenation-during-anesthesia
#20
Henrik Sørensen
Likely, maintained organ and notably cerebral perfusion, secures rapid recovery following anesthesia. To secure cerebral blood flow (CBF) at least mean arterial pressure (MAP) and the arterial carbon dioxide tension (PaCO2) need to be considered. CBF is "autoregulated", i.e. stays more or less stable within a MAP of 50-150 mmHg, but the lower limit appears to depend on the central blood volume and/or cardiac output, illustrated by a decrease in CBF at a MAP of 80 mmHg with a compromised central blood volume, while CBF remains constant with a MAP < 40 mmHg, if the central blood volume is maintained...
December 2016: Danish Medical Journal
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