Rovnat Babazade

Clonidine Does Not Reduce Pain or Opioid Consumption After Noncardiac Surgery.

BACKGROUND: Clonidine is an &agr;2-adrenoceptor agonist, which has analgesic properties. However, the analgesic efficacy of perioperative clonidine remains unclear. We, therefore, tested the hypothesis that clonidine reduces both pain scores and cumulative opioid consumption during the initial 72 hours after noncardiac surgery. METHODS: Six hundred twenty-four patients undergoing elective noncardiac surgery under general and spinal anesthesia were included in this substudy of the PeriOperative ISchemia Evaluation-2 trial. Patients were randomly assigned to 0.2 mg oral clonidine or placebo 2 to 4 hours before surgery, followed by 0.2 mg/d transdermal clonidine patch or placebo patch, which was maintained until 72 hours after surgery. Postoperative pain scores and opioid consumption were assessed for 72 hours after surgery. RESULTS: Clonidine had no effect on opioid consumption compared with placebo, with an estimated ratio of means of 0.98 (95% confidence interval, 0.70–1.38); P = 0.92. Median (Q1, Q3) opioid consumption was 63 (30, 154) mg morphine equivalents in the clonidine group, which was similar to 60 (30, 128) mg morphine equivalents in the placebo group. Furthermore, there was no significant effect on pain scores, with an estimated difference in means of 0.12 (95% confidence interval, −0.02 to 0.26); 11-point scale; P = 0.10. Mean pain scores per patient were 3.6 ± 1.8 for clonidine patients and 3.6 ± 1.8 for placebo patients. CONCLUSIONS: Clonidine does not reduce opioid consumption or pain scores in patients recovering from noncardiac surgery.

Pharmacokinetic and pharmacodynamic evaluation of sublingual sufentanil in the treatment of post-operative pain

ABSTRACT Introduction: Intravenous patient-controlled analgesia using opioids is frequently used to provide perioperative analgesia. However, there are a number of drawbacks for intravenous patient-controlled analgesia. The sufentanil sublingual tablet system is a major evolution in technology and drug development for postoperative pain management. Areas Covered: We reviewed the use of sublingual sufentanil in postoperative pain management, with a focus on chemistry, pharmacokinetics and clinical use in different surgical patients. Expert Opinion: The sufentanil sublingual tablet system can decrease intravenous patient-controlled analgesia-related safety issues. Current clinical studies have demonstrated this novel system to be safe and effective in postoperative pain management.

Association Between Intraoperative Low Blood Pressure and Development of Surgical Site Infection After Colorectal Surgery: A Retrospective Cohort Study

Objective: We tested the primary hypothesis that surgical site infections (SSIs) are more common in patients who had longer periods of intraoperative low blood pressure. Our secondary hypothesis was that hospitalization is prolonged in patients experiencing longer periods of critically low systolic blood pressure (SBP) and/or mean arterial pressure (MAP). Background: Hypotension compromises local tissue perfusion, thereby reducing tissue oxygenation. Hypotension might thus be expected to promote infection, but the extent to which low blood pressure contributes remains unclear. Methods: We considered patients who had colorectal surgery lasting at least 1 hour at the Cleveland Clinic between 2009 and 2013. The duration of hypotensive exposure and development of SSI was assessed with logistic regression; the association between hypotensive exposure and duration of hospitalization was assessed with Cox proportional hazard regression. Results: A total of 2521 patients were eligible for analysis. There was no adjusted association between SBP hypotension < 80 mm Hg and SSI, with an estimated odds ratio (95% confidence interval) of 0.97 (0.81, 1.17) per 5-minute increase in SBP hypotension (P = 0.54). There was also no adjusted association between MAP hypotension time and SSI, with estimated odds ratio of 0.97 (0.81, 1.17) for a 5-minute increase in MAP hypotension < 55 mm Hg time (P = 0.71). There was no association between duration of hypotension and time to discharge. Conclusions: Intraoperative hypotension does not seem to be a clinically important predictor of SSI after colorectal surgery, probably because the outcomes are overwhelmingly determined by other baseline and surgical factors—and perhaps postoperative hypotension.

Novel needle guide reduces time to perform ultrasound-guided femoral nerve catheter placement: A randomised controlled trial

BACKGROUND Ultrasound-guided nerve blocks have become the standard when performing regional nerve blocks in anaesthesia. Infiniti Plus (CIVCO Medical Solutions, Kalona, Iowa, USA) is a needle guide that has been recently developed to help clinicians in performing ultrasound-guided nerve blocks. OBJECTIVES We tested the hypothesis that femoral nerve catheter placement carried out with the Infiniti Plus needle guide will be quicker to perform than without the Infiniti Plus. Secondary aims were to assess whether the Infiniti Plus needle guide decreased the number of block attempts and also whether it improved needle visibility. DESIGN A randomised, controlled trial. SETTING Cleveland Clinic, Cleveland, Ohio, USA. PATIENTS We enrolled adult patients having elective total knee arthroplasty with a femoral nerve block and femoral nerve catheter. Patients, who were pregnant or those who had preexisting neuropathy involving the surgical limb, coagulopathy, infection at the block site or allergy to local anaesthetics were excluded. INTERVENTIONS Patients were randomised into two groups to receive the ultrasound-guided femoral nerve catheter placement with or without the Infiniti Plus needle guide. MAIN OUTCOME MEASURES The time taken to place the femoral nerve catheter, the number of attempts, the success rate and needle visibility were recorded. We used an overall &agr; of 0.05 for both the primary and secondary analyses; the secondary analyses were Bonferroni corrected to control for multiple comparisons. RESULT The median (interquartile range Q1 to Q3) time to perform the femoral nerve catheter placement was 118 (100 to 150) s with Infiniti Plus and 177 (130 to 236) s without Infiniti Plus. Infiniti Plus significantly reduced the time spent performing femoral nerve catheterisation, with estimated ratio of means [(95% confidence interval), P value] of 0.67 [(0.60 to 0.75), P < 0.001] with Infiniti Plus compared with no Infiniti Plus. However, Infiniti Plus had no effect on the odds of a successful femoral nerve catheter placement, number of attempts or percentage of perfect needle visibility. CONCLUSION We found that the use of Infiniti Plus decreased the median time to successfully place a femoral nerve catheter by 33% compared with not using Infiniti Plus. This difference may be more apparent to clinicians undertaking this procedure less often or by those in training as our team was very experienced, had been trained in the technique and was working in a hospital with a large caseload. TRIAL REGISTRATION Clinicaltrials.gov identifier: NCT02080481.

The Association Between Sjögren Syndrome and Adverse Postoperative Outcomes: A Historical Cohort Study Using Administrative Health Data.

BACKGROUND:Sjögren syndrome is a chronic autoimmune disorder of the exocrine glands associated with cardiovascular events. We aimed to evaluate postoperative complications in patients with Sjögren syndrome undergoing noncardiac surgery. Specifically, we tested the primary hypothesis that patients with Sjögren syndrome have a greater risk of postoperative cardiovascular complications than those without the disease. Our secondary hypotheses were that patients with Sjögren syndrome are at greater risk of thromboembolic complications, microcirculatory complications, and mortality. METHODS:We obtained censuses of 2009 to 2010 inpatient hospital discharges across 7 states. Sjögren syndrome was identified by the present-on-admission diagnosis code 710.2. Each Sjögren n syndrome discharge was propensity matched to 4 control discharges. A generalized linear model was used to compare matched Sjögren syndrome patients and controls on risk of in-hospital cardiovascular complications, thromboembolic complications, microcirculatory complications, and mortality. RESULTS:Among 5.5 million qualifying discharges, our final matched sample contained 22,785 matched discharges, including 4557 with Sjögren syndrome. Sixty-six (1.45%) of the matched discharges with Sjögren syndrome and 213 (1.17%) of the matched controls had associated in-hospital cardiovascular complications. The adjusted odds ratio (99% confidence interval) was estimated at 1.14 (0.79–1.64), which was not statistically significant (P = 0.35). There were no significant differences in the odds of in-hospital thromboembolic complications (1.12 [0.82–1.53]; P = 0.36), in the odds of in-hospital microcirculatory complications (0.98 [0.77–1.26]; P = 0.86), or in the odds of in-hospital mortality (1.11 [0.76–1.61]; P = 0.49). CONCLUSIONS:The presence of Sjögren syndrome does not place patients at an increased risk for postoperative complications or in-hospital mortality.

The cost-effectiveness of epidural, patient-controlled intravenous opioid analgesia, or transversus abdominis plane infiltration with liposomal bupivacaine for postoperative pain management

STUDY OBJECTIVE Intravenous patient-controlled opioid analgesia (IVPCA), epidural analgesia and transversus abdominis plane (TAP) infiltrations are frequently used postoperative pain management modalities. The aim of this study was to conduct a cost-effectiveness analysis comparing the use of epidural, IVPCA, and TAP infiltrations with liposomal bupivacaine for analgesia in the first 72 h postoperatively in patients undergoing major lower abdominal surgery. DESIGN Retrospective cost effectiveness analysis. SETTING Operating room. PATIENTS We obtained data on major lower-abdominal surgeries performed under general anesthesia on adult patients between January 2012 and July 2014. INTERVENTIONS A cost-effectiveness analysis was comparing the use of epidural, IVPCA, and TAP infiltrations with liposomal bupivacaine for analgesia in the first 72 h postoperatively. MEASUREMENTS A decision analytic model was used to estimate the health outcomes for patients undergoing major lower abdominal surgery. The primary outcome was time-weighted pain from 0 to 72 h after surgery, as measured by numerical rating scale pain scores. The analysis was conducted from the perspective of the hospital as the party responsible for most costs related to surgery. MAIN RESULTS From the base case analysis, IVPCA was the optimal strategy regarding cost and effect. TAP with LB, however, was only narrowly dominated, while epidural was clearly dominated. From the sensitivity analysis at willingness-to-pay (WTP) of

Ultrasound Detection of Arteria Comitans: A Novel Technique to Locate the Sciatic Nerve

150, IV PCA and TAP infiltration were each the optimal strategy for approximately 50% of the iterations. At WTP of

Systemic Lupus Erythematosus Is Associated With Increased Adverse Postoperative Renal Outcomes and Mortality: A Historical Cohort Study Using Administrative Health Data

10,000, epidural was only the optimal strategy in 10% of the iterations. CONCLUSIONS This is the first study in the literature to compare the cost-effectiveness of epidural, IVPCA, and TAP infiltrations with LB. Within reasonable WTP values, there is little differentiation in cost-effectiveness between IVPCA and TAP infiltration with LB. Epidural does not become a cost-effective strategy even at much higher WTP values.

Effects of sevoflurane and desflurane on otoacoustic emissions in humans

Abstract In the gluteal and thigh region, the arteria comitans accompanies the sciatic nerve for a short distance, then penetrates the nerve and runs to the lower part of the thigh. There is no study that recognizes this artery as a guide to the location of the sciatic nerve. In this report, we describe a series of 6 knee arthroplasty patients in whom ultrasound-guided sciatic nerve block was successfully performed using color Doppler and pulsed wave Doppler to visualize the arteria comitans as a guide to the location of the sciatic nerve. We have found that detecting the arteria comitans as a landmark is novel and may offer an additional tool with the existing methods for sciatic nerve block.