Intraoperative Mean Arterial Blood Pressure Research Articles

Higher intraoperative blood pressure does not reduce acute kidney injury in non-cardiac surgery: what do the results of the POISE-3 trial tell us?

Hypotension is a common cause of acute kidney injury (AKI), with strong associations between the duration and magnitude of hypotension seen across a range of situations including major surgery. However, it is less clear whether targeting higher intraoperative MAP results in lower rates of AKI. In a prespecified analysis of the Perioperative Ischemic Evaluation-3 (POISE-3) randomized controlled trial, this question is addressed for noncardiac major surgery. Despite an increase in cessation of antihypertensive medications and higher intraoperative mean arterial blood pressure in the intervention arm, no differences were seen in the rates of postoperative AKI. This commentary discusses the strengths and weaknesses of the trial, as well as providing some interpretation of results and their relevance to clinical practice.

Dexmedetomidine Moderate Sedation Versus General Anesthesia on the Diagnostic Yield of Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration: A Randomized Controlled Study.

One of the factors that affect the diagnostic yield of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is the level of sedation. Therefore, we aimed to compare dexmedetomidine (DEX) as moderate sedation (MS) versus general anesthesia (GA) on the diagnostic yield of EBUS-TBNA. This randomized open-label controlled trial was carried out on 70 patients older than 18 years of age, classified as American Society of Anesthesiologists (ASA) II or III, and scheduled for EBUS-TBNA. Patients were randomly allocated into two equal groups. Group D received 1 μg/kg fentanyl 2 minutes before induction with a 1 μg/kg infusion of DEX for 10 minutes, then maintenance with 0.5 - 1 μg/kg/h aiming for a Ramsey Sedation Scale of 4 - 5 while preserving hemodynamics. Group GA received 1 μg/kg fentanyl, 2 mg/kg propofol, and 0.5 mg/kg atracurium (then 0.1 mg/kg every 20 minutes). Group D had a significantly higher rate of recalling the procedure (P = 0.005) and a lower rate of shortness of breath compared to group GA (P = 0.038). Intraoperative heart rate measurements at baseline were not significantly different between groups but were significantly lower at 5 min, 10 min, 15 min, 20 min, and at the end of surgery in group D compared to group GA (P < 0.05). Intraoperative mean arterial blood pressure measurements at baseline, 5 min, 10 min, 15 min, 20 min, and at the end of surgery were not significantly different between groups. Recovery time was significantly shorter in group D compared to group GA (P < 0.001). Compared to GA, MS with DEX showed a comparable diagnostic yield with faster recovery time and better patient satisfaction, as evidenced by a willingness to repeat procedures when needed and less shortness of breath in EBUS-TBNA.

Dexmedetomidine Versus Fentanyl on Time to Extubation in Patients with Morbid Obesity Undergoing Laparoscopic Sleeve Gastrectomy.

Sleeve gastrectomy (SG) is an effective method for managing obesity. While opioids are used for their hemodynamic stability and their ability to reduce intraoperative stress, they also have reported side effects. Dexmedetomidine (DEX), an α2 adrenergic receptor agonist, is noted for its analgesic and anesthetic-sparing effects, leading to a higher quality of recovery. The study aims to compare the effects of fentanyl and dexmedetomidine (DEX) on the recovery of morbidly obese patients following laparoscopic sleeve gastrectomy (SG). This randomized, double-blind study involved 64 patients, equally divided into two groups. The Dexmedetomidine group (Group D) received an intravenous (IV) loading dose of dexmedetomidine (1 μg/kg) over 15 minutes before anesthesia induction, followed by a 10 mL saline 0.9% infusion over 60 seconds during induction. Post-intubation, dexmedetomidine was administered at 0.5 μg/kg/h. The Fentanyl group (Group F) received a volume-matched saline 0.9% IV over 15 minutes pre-induction and fentanyl (1 μg/kg) diluted in 10 ml saline 0.9% IV over 60 seconds during induction. After intubation, a continuous fentanyl infusion was maintained at a rate of 1 μg/kg/hr. Extubation time was significantly shorter in the Dexmedetomidine group (Group D) at 8.25 ± 2.7 minutes compared to the Fentanyl group (Group F) at 10.47 ± 2.17 minutes, with a P-value of 0.001. Intraoperative heart rate and mean arterial blood pressure were also significantly lower in Group D than in Group F. Visual analogue scale (VAS) pain scores were significantly lower in Group D compared to Group F upon arrival at the post-anesthesia care unit and at 2 hours postoperatively (P-value < 0.05). Additionally, the morphine dose consumed in the first 12 hours after surgery was significantly lower in Group D (5.75 ± 2.20 mg) compared to Group F (8 ± 2.38 mg), with a P-value of 0.001. For morbidly obese patients undergoing laparoscopic sleeve gastrectomy, dexmedetomidine (DEX) proves to be an effective anesthetic choice. It not only reduces extubation time but also lowers early postoperative visual analogue scale (VAS) pain scores and opioid consumption within the first 12 hours following surgery.

Association of dexmedetomidine use with haemodynamics, postoperative recovery, and cost in paediatric anaesthesia: a hospital registry study

BackgroundDexmedetomidine utilisation in paediatric patients is increasing. We hypothesised that intraoperative use of dexmedetomidine in children is associated with longer postanaesthesia care unit length of stay, higher healthcare costs, and side-effects. MethodsWe analysed data from paediatric patients (aged 0–12 yr) between 2016 and 2021 in the Bronx, NY, USA. We matched our cohort with the Healthcare Cost and Utilization Project-Kids’ Inpatient Database (HCUP-KID). ResultsAmong 18 104 paediatric patients, intraoperative dexmedetomidine utilisation increased from 51.7% to 85.7% between 2016 and 2021 (P<0.001). Dexmedetomidine was dose-dependently associated with a longer postanaesthesia care unit length of stay (adjusted absolute difference [ADadj] 19.7 min; 95% confidence interval [CI]: 18.0–21.4 min; P<0.001, median length of stay of 122 vs 98 min). The association was magnified in children aged ≤2 yr undergoing short (≤60 min) ambulatory procedures (ADadj 33.3 min; 95% CI: 26.3–40.7 min; P<0.001; P-for-interaction <0.001). Dexmedetomidine was associated with higher total hospital costs of USD 1311 (95% CI: USD 835–1800), higher odds of intraoperative mean arterial blood pressure below 55 mm Hg (adjusted odds ratio [ORadj] 1.27; 95% CI: 1.16–1.39; P<0.001), and higher odds of heart rate below 100 beats min−1 (ORadj 1.32; 95% CI: 1.21–1.45; P<0.001), with no preventive effects on emergence delirium requiring postanaesthesia i.v. sedatives (ORadj 1.67; 95% CI: 1.04–2.68; P=0.034). ConclusionsIntraoperative use of dexmedetomidine is associated with unwarranted haemodynamic effects, longer postanaesthesia care unit length of stay, and higher costs, without preventive effects on emergence delirium.

Intraoperative hypotension and its association with acute kidney injury in patients undergoing elective cardiac surgery: a large retrospective cohort study

BACKGROUND Intraoperative hypotension (IOH) is known to affect renal outcomes in noncardiac surgery. However, it is unclear whether intraoperative hypotension (IOH) causes postoperative acute kidney injury following cardiac surgery. OBJECTIVE This study aimed to determine whether the duration of IOH during cardiac surgery is associated with the incidence of postoperative acute kidney injury (AKI) and identify its impact on long-term outcomes. DESIGN Retrospective cohort study. SETTING Academic university hospital (Heart and Diabetes Center, Bad Oeynhausen, Germany). PATIENTS A cohort of 28 909 patients who underwent elective cardiac surgery between 1 January 2009 and 31 December 2018. INTERVENTIONS IOH was defined as intraoperative mean arterial blood pressure (MAP) of less than 60 mmHg for more than 2 min. The cumulative duration of these IOH events was recorded each patient. MAIN OUTCOME MEASURES The primary outcome was the incidence of AKI according to the KDIGO criteria (Kidney Disease: Improving Global Outcomes). Logistic regression analysis was used to analyse the associations between IOH and the incidence of AKI. Secondary outcomes were the independent predictors for the incidence of AKI. RESULTS Postoperative AKI was observed in 42.9% of patients. The cumulative duration of IOH (minutes) had a significant influence on the incidence of AKI [odds ratio (OR) 1.004; 95% confidence interval (CI) 1.003 to 1.005; P &lt; 0.001] (P &gt; 0.001 versus P &lt; 0.001). The survival time was significantly shorter in patients with a higher cumulative duration of IOH, patients aged more than 70 years, and those who developed AKI (P &lt; 0.001). Logistic regression analysis identified eight predictors of AKI: age, cumulative duration of IOH, duration of surgery, chronic obstructive pulmonary disease, body mass index, type of surgery, American Society of Anesthesiologists stage, and Euroscore 2. CONCLUSIONS The cumulative duration of IOH is an independent risk factor for the occurrence of postoperative AKI after cardiac surgery. TRIAL REGISTRATION Ethics Committee of the Ruhr University Bochum (Register number 2019-491).

Safety and effectiveness of opioid-free anaesthesia in thoracoscopic surgery: a preliminary retrospective cohort study

BackgroundThis study aimed to observe the effect of opioid-free anaesthesia (OFA) on intraoperative haemodynamic,postoperative analgesia and postoperative nausea and vomiting (PONV) in thoracoscopic surgery in order to provide more evidence for evaluating the safety and effectiveness of OFA technology.MethodsThis was a single-centre retrospective observational study.Adult patients who underwent thoracoscopic surgery with the preoperative thoracic paravertebral block between January 2017 and June 2020 were included.A cohort of 101 thoracoscopic surgery patients who received the OFA technique were matched with 101 thoracoscopic surgery patients who received standard opioid-containing anaesthesia(SOA). Heart rate (HR) and mean arterial blood pressure (MAP) were measured before anaesthesia induction, immediately after endotracheal intubation, at the beginning of surgery, and 10, 20, and 30 min after surgery began.The total amount of intraoperative infusion, frequency of vasoactive drugs use, morphine ingested via the patient-controlled intravenous analgesia (PCIA) 24 h post-surgery,visual analogue scale (VAS) scores at rest and activity on the first day post-surgery, and frequency of nausea and vomiting within 24 h post-surgery were analysed.ResultsThere was no significant difference in intraoperative HR between the two groups (F = 0.889, P = 0.347); however, there was significant difference in intraoperative MAP (F = 16.709, P < 0.001), which was lower in SOA patients than in OFA patients. The frequency of vasoactive drug use and amount of infusion was less in OFA patients (P = 0.001). The consumption of morphine used by the PCIA 24 h post-surgery was significantly lower in OFA patients (OFA, 1.8 [0, 4.8] mg vs. SOA, 3.6 [0.6, 23] mg, P < 0.001). There was no significant difference in VAS scores at rest (P = 0.745) or during activity (P = 0.792) on the first day post-surgery. There was also no statistically significant difference in nausea and vomiting within 24 h post-surgery (P = 0.651).ConclusionsThis case-control study demonstrated that compared with SOA, OFA can effectively maintain the stability of intraoperative MAP, reduce the incidence of hypotension. Although OFA reduced morphine consumption via the PCIA pump 24 h post-surgery, postoperative pain scores and nausea and vomiting within 24 h post-surgery were similar between the groups.But this study was only a preliminary study and needed to confirm in a larger, more robust trial.

Effect of adrenaline concentration in tumescence solution on intraoperative hemodynamics of liposuction patients: A randomized triple-blind trial

ABSTRACT Background Epinephrine in liposuction solution mediated vasoconstriction thus decrease in adrenergic side effects, local anesthetic toxicity, and bleeding. The optimum safe adrenaline concentration was not well investigated. Aim This study aimed to compare between adrenaline 1 mg/L and 2 mg/L in tumescent fluid concerning hemodynamics during abdominal liposuction operations. Methods Forty cases scheduled for liposuction for abdomen and flanks and body were involved in this randomized, triple-blind, controlled trial. Cases were randomized equally into two groups. Group A (low adrenaline concentration group): received 1 mg per liter of epinephrine. Group B (high adrenaline concentration group): received 2 mg per liter of epinephrine. Results Intraoperative heart rate and mean arterial blood pressure at base line were insignificantly different between both groups (p value > 0.05) while at 30, 60, 90, and end of surgery were significantly higher in group B group as opposed to group A (p value < 0.05). Incidence of sinus tachycardia and PVCs were significantly higher in group B than group A (P < 0.05), while surgeon satisfaction was comparable between both groups (p value > 0.05). Conclusions In liposuction procedures, the safest adrenaline concentration is 1 mg/L as evidenced by hemodynamics stability and surgeon satisfaction thus even in high volume liposuction, the adrenaline concentration should not exceed 1 mg/L and should be handled to cover the used crystalloid solution.

The Role of Intraoperative and Early Postoperative Blood Pressure Variations, Fluid Balance and Inotropics in Fibula Free Flap Head and Neck Reconstruction: A Retrospective Analysis.

In head and neck reconstructive surgery, postoperative complications are a well-known concern. We examined 46 patients who underwent ablative surgery and received fibula free flap reconstruction. The main focus was to assess the influence of intraoperative blood pressure fluctuations and the administration of inotropic drugs on complications, either related to the flap or systemic, serving as the primary endpoint. Utilizing logistic regression models, we identified that intraoperative mean arterial blood pressure (MAP) drops did not correlate with the occurrence of either flap-related complications (MAP < 70, p = 0.79; MAP < 65, p = 0.865; MAP < 60, p = 0.803; MAP < 55, p = 0.937) or systemic medical complications (MAP < 70, p = 0.559; MAP < 65, p = 0.396; MAP < 60, p = 0.211; MAP < 55, p = 0.936). The occurrence of flap-related complications significantly increased if a higher dosage of dobutamine was administered (median 27.5 (IQR 0-47.5) vs. 62 (38-109) mg, p = 0.019) but not if norepinephrine was administered (p = 0.493). This correlation was especially noticeable given the uptick in complications associated with fluid overload (3692 (3101-4388) vs. 4859 (3555-6216) mL, p = 0.026). Intraoperative and immediate postoperative blood pressure fluctuations are common but are not directly associated with flap-related complications; however, dobutamine application as well as fluid overload may impact flap-specific complications.

Analgesic Effect of Addition of Pectointercostal Block to Serratus Anterior Plane Block in Breast Surgeries: A Randomized, Controlled Trial

BACKGROUND: Ultrasound-guided serratus anterior plane block (SAPB) is an efficient perioperative analgesic modality for breast surgeries. SAPB does not block the anterior cutaneous branches of the intercostal nerves; thus, it does not provide adequate analgesia for the parasternal region and the medial side of the breast. A new parasternal block, the pectointercostal fascial plane block (PIFB) has been developed to overcome this issue. OBJECTIVES: The study aimed to evaluate the perioperative analgesic effect of using PIFB in addition to SAPB. The primary outcome was to evaluate the postoperative pain score. The secondary outcomes were to assess perioperative opioid requirements, hemodynamic stability, and the satisfaction of the patient and surgeon. STUDY DESIGN: The current study was a prospective, double-blinded, randomized controlled study. The current study was registered at the Pan-African Clinical Trials Registry (PACTR202001789968542) and was designed after obtaining ethical institutional approval (Institutional Review Board No 00012098, Federalwide Assurance No 00018699). SETTING: The study involved 60 women between 21 and 69 years old with breast cancer who were scheduled for modified radical mastectomy or conservative breast surgeries in a university hospital. METHODS: After verbal and informed written consent, the patients were allocated to Group 1, which received SAPB, and Group 2, which received SAPB with PIFB. We assessed the Visual Analog Scale (VAS), perioperative opioid requirements, intraoperative hemodynamic stability, rescue analgesia, and complications. Patient and surgeon satisfaction were surveyed using a questionnaire where one is very dissatisfied and 5 is very satisfied. RESULTS: Intraoperative mean arterial blood pressure (MABP) and heart rate were significantly lower in Group 2 (SAPB+PIFB). The number of patients who needed intraoperative fentanyl was also significantly lower in Group 2 (SAPB+PIFB) (P value = 0.010). Postoperative VAS showed no significant difference in both groups. The number of patients who needed postoperative rescue morphine, time for the first rescue analgesia, first morphine dose (mg), and total opioid consumption were also comparable for both groups. Patient satisfaction and surgeon satisfaction were comparable for both groups (P values = 1.000 and 0.496, respectively). LIMITATIONS: VAS was not recorded during movements and no follow-up was done to detect the potential effect on chronic postmastectomy pain. Moreover, after reviewing the literature, there was no efficient data about adding PIFB with different regional blocks for breast surgery. CONCLUSIONS: The number of patients who needed intraoperative fentanyl, as well as the MABP and heart rate were significantly lower in Group 2 (SAPB+PIFB). Postoperative vital signs, VAS, postoperative analgesic requirements, and opioid consumption were comparable for both groups. Patient satisfaction was comparable for both groups, while surgeon satisfaction was higher in Group 2 (SAPB+PIFB) but statistically not significant. KEY WORDS: Pectointercostal, fascial plane block, serratus anterior plane block, breast surgery, regional analgesia for mastectomy

Evaluating the perioperative analgesic effect of ultrasound-guided trigeminal nerve block in adult patients undergoing maxillofacial surgery under general anesthesia: A randomized controlled study

ABSTRACT Background Although ultrasound-guided nerve blocks have lately been used to control pain, there is not much evidence assessing the outcome of trigeminal nerve block (TNB) in maxillofacial surgery. This study sought to evaluate the safety and efficacy of analgesia with an ultrasound-guided trigeminal nerve block (USGTNB) in patients undergoing unilateral maxillofacial surgery under general anesthesia. Methods This single-blinded, parallel-group, randomized clinical trial included 50 adult patients who had American Society of Anesthesiologists physical status I or II and were prepared for elective unilateral maxillofacial procedure under general anesthesia. The patients were randomized into two groups. In the intervention (TNB) group, 25 patients received USGTNB using 5 ml of bupivacaine 0.25%, while in the control group, 25 patients received only general anesthesia. Total intraoperative fentanyl consumption was the primary outcome. The secondary outcomes were the intraoperative hemodynamic parameters besides the postoperative pain, total opioid consumption, complications, and patient satisfaction. Results Compared to general anesthesia, USGTNB significantly reduced the intraoperative fentanyl consumption (2.38 ± 0.62 vs 0.36 ± 0.55, p < 0.001), and the intraoperative heart rate and mean arterial blood pressure at 1, 2, and 3 h (p < 0.001), the numerical rating score during the 24 postoperative hours (p < 0.001), and the postoperative nalbuphine consumption (11.60 ± 4.72 vs 1.92 ± 3.28, p < 0.001). USGTNB had a better safety profile and showed better patient satisfaction compared to general anesthesia alone (8.04 ± 0.89 vs 5.84 ± 0.90, p < 0.001). Conclusion USGTNB can provide an effective, safe approach for controlling pain in adult patients undergoing maxillofacial surgery.

Effect of single dose preemptive intravenous paracetamol, dexamethasone, and magnesium sulfate on perioperative hemodynamic variables and post-operative nausea, vomiting, and pain in open cholecystectomy done under general anesthesia: A prospective, randomized, and single-blind study

Background: Pain due to open cholecystectomy can result in delayed recovery and poor operative outcomes. Multimodal approaches to pain control cause functional improvement. We compared the efficacy of paracetamol 1 g, dexamethasone 8 mg, and magnesium sulfate 2 g with normal saline in control over perioperative hemodynamics and post-operative pain in patients undergoing open cholecystectomy under general anesthesia. Aims and Objectives: This study conducted to assess the effect of preemptive intravenous paracetamol, dexamethasone, and magnesium sulfate on perioperative hemodynamic variables (primary outcome) and post-operative nausea, vomiting, and pain (secondary outcome) in open cholecystectomy. Materials and Methods: Sixty patients of ASA Grade I/II were randomized into two groups to receive either normal saline 100 ml iv (Group C, n=30) or infusion containing inj. paracetamol 1 g, inj. dexamethasone 8 mg and inj. magnesium sulfate 2 g iv (group PDM, n=30), 20 min before induction. Intraoperative and post-operative hemodynamic data, post-operative pain scores, and incidence of nausea vomiting were recorded. Results: Intraoperative pulse rate was significantly higher at intubation and 15 min after intubation in the control group and intraoperative systolic, diastolic, and mean arterial blood pressure were significantly higher in control group at intubation and until 60 min. Post-operative pulse rate was significantly higher in the control groups at 180 min and incidence of PONV reduced in PDM group until 90 min. Conclusion: Preemptive intravenous infusion of paracetamol, dexamethasone, and magnesium sulfate provided better stability over perioperative hemodynamics, reduced the incidence of post-operative nausea vomiting, and provided better post-operative pain control.

Higherintraoperative mean arterial blood pressure does not reduce postoperative delirium in elderly patients following gastrointestinal surgery: A prospective randomized controlled trial.

This study aimed to describe the relationship between the different levels of intraoperative mean arterial blood pressure (MAP) and postoperative delirium in elderly patients undergoing gastrointestinal laparoscopic surgery. This prospective controlled clinical trial enrolled 116 patients aged 65 to 85 years who underwent gastrointestinal laparoscopic surgery. These patients were randomized 1:1 to a MAP goal of 65 to 85 mmHg (L group) or an 86 to 100 mmHg (H group). The primary endpoint was the incidence of postoperative delirium, assessed twice daily with the Confusion Assessment Method (CAM) and Richmond Agitation-Sedation Scale (RASS) during the first five postoperative days. Delirium severity was evaluated with the Delirium-O-Meter (D-O-M). 108 patients (L group n = 55, H group n = 53) were eventually included in intention-to-treat analyses. Postoperative delirium occurred in 18 (32.7%) of 55 cases of L group and in 15 (28.3%) of 53 cases of H group. The incidence of delirium subtypes between the two groups: hypoactive delirium 14.5% (8/55) vs 11.3% (6/53); hyperactive delirium 7.3% (4/55) vs 3.8% (2/53); mixed delirium 10.9% (6/55) vs 13.2% (7/53). However, the L group showed higher D-O-M scores of the first episode of delirium: 14.5 (Q1 = 12, Q3 = 18.5) vs 12 (Q1 = 10, Q3 = 14), which means the delirium is more severe. Compared with 65 to 85 mmHg, maintaining intraoperative MAP at 86-100 mmHg did not reduce the incidence of postoperative delirium in elderly patients undergoing gastrointestinal laparoscopic surgery. However, the severity of delirium could be reduced and blood loss is a risk factor for postoperative delirium.

Ability of the surgical Apgar score to predict acute kidney injury following radical cystectomy.

Acute kidney injury (AKI) is a common complication after radical cystectomy (RC). Previous literature has shown that intraoperative hemodynamic instability measured via the surgical Apgar score is an independent predictor of major complications following RC. We sought to determine whether the surgical Apgar score is predictive of postoperative AKI. We performed a retrospective review of RC patients at our institution from 2010 to 2017. Intraoperative hemodynamic instability was captured via the Apgar score based on the lowest intraoperative mean arterial blood pressure, lowest heart rate, and estimated blood loss. Patients were divided into 3 groups: high-risk (HR; Apgar ≤4), intermediate-risk (IR; Apgar score 5-6), and low-risk (LR; Apgar score ≥7). AKIs were graded according to the Kidney Disease Improving Global Outcomes (KDIGO) criteria. High grade AKIs were defined as KDIGO grade 2 or 3. Categorical variables were assessed using the Pearson Chi-Square test, quantitative with the Kruskal-Wallis test, and multivariable logistic regression to identify predictors of AKI and high grade AKIs within 30 days of RC. Eight hundred and seventy-three patients were included with a median follow-up of 35 months. AKI within 30 days was observed in 28% of patients. Predictors of AKI within 30 days on adjusted analysis included IR (OR: 1.83, P = 0.002) and HR (OR: 3.53, P < 0.001) Apgar scores. IR (OR: 2.23, P = 0.007) and HR (OR: 4.87, P < 0.001) Apgar scores were also predictors of high-grade AKIs. Intraoperative hemodynamic instability measured via the Apgar score can be predictive of AKI, which can guide individualized fluid management in the postoperative period.

Relevance of Infarct Size, Timing of Surgery, and Peri-operative Management for Non-ischaemic Cerebral Complications After Carotid Endarterectomy

To assess the incidence of post-operative non-ischaemic cerebral complications as a pivotal outcome parameter with respect to size of cerebral infarction, timing of surgery, and peri-operative management in patients with symptomatic carotid stenosis who underwent carotid endarterectomy (CEA). Retrospective analysis of prospectively collected single centre CEA registry data. Consecutive patients with symptomatic carotid stenosis were subjected to standard patch endarterectomy. Brain infarct size was measured from the axial slice of pre-operative computed tomography/magnetic resonance imaging demonstrating the largest infarct dimension and was categorised as large (> 4 cm2), small (≤ 4 cm2), or absent. CEA was performed early (within 14 days) or delayed (15 – 180 days) after the ischaemic event. Peri-operative antiplatelet regimen (none, single, dual) and mean arterial blood pressure during surgery and at post-operative stroke unit monitoring were registered. Non-ischaemic post-operative cerebral complications were recorded comprising haemorrhagic stroke and encephalopathy, i.e., prolonged unconsciousness, delirium, epileptic seizure, or headache. 646 symptomatic patients were enrolled of whom 340 (52.6%) underwent early CEA; 367 patients (56.8%) demonstrated brain infarction corresponding to stenosis induced symptoms which was small in 266 (41.2%) and large in 101 (15.6%). Post-operative non-ischaemic cerebral complications occurred in 12 patients (1.9%; 10 encephalopathies, two haemorrhagic strokes) and were independently associated with large infarcts (adjusted odds ratio [OR] 6.839; 95% confidence interval [CI] 1.699 – 27.534) and median intra-operative mean arterial blood pressure in the upper quartile, i.e., above 120 mmHg (adjusted OR 13.318; 95% CI 2.749 – 64.519). Timing of CEA after the ischaemic event, pre-operative antiplatelet regimen, and post-operative blood pressure were not associated with non-ischaemic cerebral complications. Infarct size and unintended high peri-operative blood pressure may increase the risk of non-ischaemic complications at CEA independently of whether performed early or delayed.

Thoracic Epidural Versus General Anaesthesia For Laparoscopic Cholecystectomy: A Randomized Controlled Trial.

Laparoscopic cholecystectomy is one of the most commonly performed surgeries worldwide. Aim of our study was to compare the effectiveness of thoracic epidural anaesthesia with general anaesthesia for Laparoscopic cholecystectomy in terms of changes in blood pressure during surgery, postoperative pain, respiratory complications and average length of hospital stay. It was a randomized controlled trial conducted from 1stOctober 2018 to 31st October 2019. Eightytwo patients planned to undergo elective laparoscopic cholecystectomy were randomly divided into two groups, T and G. In Group T all patients underwent laparoscopic cholecystectomy under thoracic epidural anaesthesia with 12 ml of 0.25% bupivacaine and 1% lignocaine plain whereas in group G all patients underwent surgery under general anaesthesia. Intra-operative mean arterial pressure (MAP) and postoperative opioid consumption in first 24hrs were recorded as primary outcomes whereas presence or absence of respiratory complication and duration of hospital stay as secondary outcome.. Out of 82 patients, 41 patients underwent laparoscopic cholecystectomy under thoracic epidural anaesthesia and 41 patients had surgery under general anaesthesia. Mean arterial pressure was lower in Group T and the difference was statistically significant. The average time of first complaint of postoperative pain in Group T was 5.4±1.26 hours as compared to less than 0.79±0.25 hours in Group G. Patients in group T required lower doses of opioid analgesia in first twenty-four hours as compared to patients in group G. Mean hospital stay in group T was 1 day as compared to 3 days in group G. Thoracic epidural anaesthesia provides a better alternative to general anaesthesia for Laparoscopic cholecystectomy with lower intraoperative mean arterial blood pressure, 24 hours postoperative consumption of opioids, respiratory complications and length of hospital stay.

Editor's Choice – Relevance of Infarct Size, Timing of Surgery, and Peri-operative Management for Non-ischaemic Cerebral Complications After Carotid Endarterectomy

To assess the incidence of post-operative non-ischaemic cerebral complications as a pivotal outcome parameter with respect to size of cerebral infarction, timing of surgery, and peri-operative management in patients with symptomatic carotid stenosis who underwent carotid endarterectomy (CEA). Retrospective analysis of prospectively collected single centre CEA registry data. Consecutive patients with symptomatic carotid stenosis were subjected to standard patch endarterectomy. Brain infarct size was measured from the axial slice of pre-operative computed tomography/magnetic resonance imaging demonstrating the largest infarct dimension and was categorised as large (> 4 cm2), small (≤ 4 cm2), or absent. CEA was performed early (within 14 days) or delayed (15 - 180 days) after the ischaemic event. Peri-operative antiplatelet regimen (none, single, dual) and mean arterial blood pressure during surgery and at post-operative stroke unit monitoring were registered. Non-ischaemic post-operative cerebral complications were recorded comprising haemorrhagic stroke and encephalopathy, i.e., prolonged unconsciousness, delirium, epileptic seizure, or headache. 646 symptomatic patients were enrolled of whom 340 (52.6%) underwent early CEA; 367 patients (56.8%) demonstrated brain infarction corresponding to stenosis induced symptoms which was small in 266 (41.2%) and large in 101 (15.6%). Post-operative non-ischaemic cerebral complications occurred in 12 patients (1.9%; 10 encephalopathies, two haemorrhagic strokes) and were independently associated with large infarcts (adjusted odds ratio [OR] 6.839; 95% confidence interval [CI] 1.699 - 27.534) and median intra-operative mean arterial blood pressure in the upper quartile, i.e., above 120 mmHg (adjusted OR 13.318; 95% CI 2.749 - 64.519). Timing of CEA after the ischaemic event, pre-operative antiplatelet regimen, and post-operative blood pressure were not associated with non-ischaemic cerebral complications. Infarct size and unintended high peri-operative blood pressure may increase the risk of non-ischaemic complications at CEA independently of whether performed early or delayed.

Comparative Study between Opioid-Free General Anesthesia by Dexmedetomidine and Opioid-Based General Anesthesia in Rhinoplasty Surgeries

Abstract Background The use of opioid-free analgesic technique have the propensity to decrease and even avoid many of these side effects and lead to early oral intake, early ambulation, earlier hospital discharge, and lesser readmission rates to the hospital in the post-operative period. Aim of the Work to compare the effect of opioid-free using Dexmedetomidine and opioid-based using Fentanyl on hemodynamics (inducing deliberate hypotension and providing a better surgical field exposure), post-operative pain intensity and the incidence of side effects in patients scheduled for rhinoplasty surgeries. Patients and Methods This study included Fifty adult patients undergoing rhinoplasty surgery. Patients were randomly divided into two equal groups. Group D received Dexmedetomidine and Group F received Fentanyl. Patients are ASA physical status I, age group ranged from 18 to 45 years. Results The study revealed a statistically significant decrease mean of group D compared to group F according to intraoperative mean arterial blood pressure. statistically significant decrease mean of group D compared to group F according to intraoperative heart rate (beat/min). Conclusion We found that dexmedetomidine is better than fentanyl for patients who undergo rhinoplasty surgeries to achieve controlled hypotension, decrease dosages of postoperative analgesics, prolong the duration of postoperative analgesia and decrease postoperative nausea and vomiting.

Does ERAS implementation in gynecologic oncology result in acute kidney injury?

<h3>Objectives:</h3> Enhanced recovery after surgery (ERAS) protocols involve judicious intravenous fluid resuscitation and routine administration of nonsteroidal anti-inflammatory drugs. Potential consequences could include a rise in incidence of acute kidney injury (AKI). A perioperative AKI can further result in increased short-term complications and in-hospital mortality for the patient. A recent study in patients undergoing colorectal surgery showed an increase in postoperative kidney injury from 2.27% to 11.36% after ERAS implementation. There have been no studies to date investigating development of AKI with ERAS in Gynecologic Oncology. Therefore, the primary aim of the current study is to measure the trend of postoperative renal function and the incidence of clinically significant acute kidney injury after ERAS implementation. The secondary outcomes are to identify independent predictors that may increase risk for development of a perioperative AKI. <h3>Methods:</h3> A retrospective cohort study was performed at Abington-Jefferson Hospital in gynecologic oncology, where ERAS was established in 2014. All women who underwent an exploratory laparotomy for benign and malignant etiologies prior to and after implementation of an ERAS protocol were included. Demographic, perioperative and surgical characteristics were collected. All patients above age 18, regardless of comorbid conditions, BMI or baseline kidney function were included. Stage 1 AKI was defined by KDIGO criteria of > 0.3 mg/dl increase within 48 hours. A p-value <0.05 was used to denote significance. <h3>Results:</h3> A total of 274 patients were included in this study: 143 in the non-ERAS cohort and 131 patients in the ERAS group. No significant difference was seen in creatinine levels or glomerular filtration rate after surgical intervention between the two cohorts (p=0.054 and p=0.588, respectively). Similarly, there was no difference in rate of AKI among patients after ERAS within the first 72 hours of surgery (0.021 vs 0.023, p=0.869). Clinically significant kidney injury occurred in six patients. AKI was associated with receipt of a postoperative blood transfusion (p=0.002). However on multivariate analysis, no patient or surgical characteristics including hypertension, blood transfusions, diabetes, intraoperative mean arterial blood pressure, complexity of procedure, age, and length of surgery were predictive of development of AKI. <h3>Conclusions:</h3> No difference in rates of acute kidney injury was detected before and after ERAS implementation in gynecologic oncology. Acute kidney injury seemed to be associated with receipt of postoperative blood products. No other independent predictors of kidney injury were identified. Nonetheless, attention should be paid to patients that may be at an increased of AKI. Further studies are required to determine to whether modification of ERAS protocols for select groups of patients could decrease rates of AKI in the perioperative setting.

Implications of amantadine sulfate usage on intraoperative hemodynamics in patients undergoing corrective surgeries for spine deformities: a randomized-controlled trial

Background Corrective spine s urg eries for scoliosis and/or kyphosis are a major challenge. This study was carried out to test whether preoperative intravenous administration of amantadine sulfate could affect the intraoperative hemodynamics in patients undergoing major spine corrective surgeries. Patients and methods This is a prospective, randomized double-blind clinical trial. Twenty adult patients were included in the study. Patients were randomized equally into two groups (10 patients each). Group A received an intravenous amantadine sulfate infusion of 200 mg in a 500 ml bottle. Group B (control group) received a ringer lactate intravenous infusion (placebo). Unlabeled bottles were given slowly 3 h before the surgery. Intraoperative hemodynamics systolic, diastolic, mean arterial blood pressure, and heart rate were recorded. Results The intraoperative mean arterial blood pressure was significantly lower in group A than group B at induction) 57.5 ± 7.94 vs. 64.9 ± 6.18, P = 0.002) and half an hour after induction) 51.8 ± 6.66 vs. 59.2 ± 6.37, P = 0.001). Also, the intraoperative mean heart rate was significantly lower in group A than group B at induction (88.5 ± 16.07 vs. 101.2 ± 19.89, P = 0.032), 3 h after induction (81.5 ± 10.33 vs. 90.8 ± 16.46, P = 0.039), and at the end of the operation (95.3 ± 7.93 vs. 103.6 ± 9.37, P = 0.004). Conclusion Preoperative administration of intravenous amantadine sulfate in corrective spine surgery has minimal effect on intraoperative hemodynamics in terms of the mean arterial blood pressure and heart rate.

Desflurane versus total intravenous anesthesia in improving the postoperative outcome for the patient undergoing spinal fixation

Background Total intravenous anesthesia (TIVA) and volatile inhalation anesthesia are both standardized techniques for lumbar laminectomy and discectomy procedures. Objective To compare TIVA versus desflurane anesthesia in improving postoperative recovery for patients undergoing spinal fixation. Patients and methods This prospective, double-blind, randomized study was carried out on 60 patients undergoing spinal fixation. Patients were randomized into two equal groups: group D received desflurane anesthesia, and group T received TIVA technique. Induction was done by propofol, fentanyl, and rocuronium. Anesthesia was maintained using desflurane in oxygen air mixture in group D. Still, anesthesia was maintained by intravenous infusion of propofol and dexmedetomidine in group T. Intraoperative vital signs, recovery time, postoperative nausea and vomiting, visual analog score, postanesthetic care unit stay time, total first 24 h postoperative analgesic needs, and serum cortisol and interleukin 6 preoperative and postoperative were assessed. Results TIVA group had lower intraoperative heart rates and mean arterial blood pressure. TIVA group also had a faster recovery time, shorter postanesthetic care unit stays, lower postoperative visual analog score for pain assessment, lower total analgesic requirements, and lower incidence of nausea and vomiting. Conclusions TIVA provided better postoperative recovery with fewer postoperative adverse effects and analgesia need.