Anesthetic Protocol Research Articles

Obesity Surgery Mortality Risk Score as a Predictor for Intensive Care Unit Admission in Patients Undergoing Laparoscopic Bariatric Surgery

Background: Laparoscopic bariatric surgery provides many benefits including lower postoperative pain scores, reduced opioid consumption, shorter hospital stays, and improved quality of recovery. However, the anaesthetic management of obese patients requires caution in determining postoperative risk and in planning adequate postoperative pathways. Currently, there are no specific indications for intensive care unit (ICU) admission in this surgical population and most decisions are made on a case-by-case basis. The aim of this study is to investigate whether Obesity Surgery Mortality Risk Score (OS-MRS) is able to predict ICU admission in patients undergoing laparoscopic bariatric surgery (LBS). Methods: We retrospectively reviewed data of patients who underwent LBS during a 2-year period (2017–2019). The collected data included demographics, comorbidities and surgery-related variables. Postoperative ICU admission was decided via bariatric anaesthesiologists’ evaluations, based on the high risk of postoperative cardiac or respiratory complications. Anaesthesia protocol was standardized. Logistic regression was used for statistical analysis. Results: ICU admission was required in 2% (n = 15) of the 763 patients. The intermediate risk group of the OS-MRS was detected in 84% of patients, while the American Society of Anaesthesiologists class III was reported in 80% of patients. A greater OS-MRS (p = 0.01), advanced age (p = 0.04), male gender (p = 0.001), longer duration of surgery (p = 0.0001), increased number of patient comorbidities (p = 0.002), and previous abdominal surgeries (p = 0.003) were predictive factors for ICU admission. Conclusions: ICU admission in obese patients undergoing LBS is predicted by OS-MRS together with age, male gender, number of comorbidities, previous abdominal surgeries, and duration of surgery.

Feasibility of opioid-free anesthesia in laparoscopic radical prostatectomy: A retrospective, quasi-experimental study

Abstract Background and Aims: Opioid-free anesthesia (OFA) provides adequate analgesia minimizing opioids. OFA has not been evaluated in laparoscopic radical prostatectomy (LRP). Our aim was to evaluate OFA feasibility and its effectiveness in LRP. Material and Methods: A quasi-experimental retrospective study of 55 adult patients undergoing LRP was performed from September 2020 until December 20223. Predefined protocols for either opioid-based anesthesia (OBA; with continuous remifentanil infusion) or OFA (continuous lidocaine, dexmedetomidine, and ketamine infusion) were followed. In both groups, wound infiltration was performed before skin incision. Primary outcome was postoperative pain management (numerical rating scale [NRS]) in the first 24 postoperative hours. Secondary outcomes were opioid consumption, start to sitting and ambulation, postoperative complications, and length of hospital stay. Results: OFA protocol patients had better median pain scores during movement at 1, 18 and 24 h, that is, 1 (interquartile range [IQR] 0–3) versus 2.5 (IQR 0–4), P = 0.047; 0 (IQR 0–1) versus 1 (IQR 0–2), P = 0.017; and 0 (IQR 0–0.25) versus 1 (IQR 0–2), P = 0.013, respectively. At 6 and 12 h, there were no statistically significant differences, that is, 0.5 (IQR 0–2) versus 1 (IQR 0–2), P = 0.908 and 1 (IQR 0–2) versus 0.5 (IQR 0–2), P = 0.929, respectively. Lower morphine requirements were recorded in the first 18 and 24 postoperative hours, that is, 0 (IQR 0–0) versus 1 (IQR 0–2.75) mg, P = 0.028 and 0 (IQR 0–2) versus 1.5 (IQR 0–3) mg, P = 0.012, respectively. Start to sitting and ambulation occurred earlier in the OFA group (P = 0.030 and P = 0.002, respectively). Linear regression showed that ambulation was independently associated with the analgesic technique (P = 0.034). Only one patient had postoperative nausea and vomiting (PONV) and belonged to the OBA group. There was no difference in total complications or the length of stay. Conclusion: In this study, OFA strategy was found to be safe, feasible, and provided adequate analgesia, minimizing the use of postoperative opioids, and was independently associated with earlier ambulation.

Propofol partial intravenous anaesthesia with isoflurane alone or in combination with fentanyl and ketamine infusions in three captive chimpanzees (Pan troglodytes) undergoing different diagnostic and surgical procedures

AbstractThree captive chimpanzees (Pan troglodytes) were scheduled for diagnostic and surgical procedures under general anaesthesia. After premedication with oral midazolam (0.2 mg kg−1) and intramuscular medetomidine (20 µg kg−1) and ketamine (3 mg kg−1), anaesthesia was induced with intravenous propofol (1–4 mg kg−1). The animals were then maintained under general anaesthesia with propofol partial intravenous anaesthesia (0.10–0.17 mg kg−1 min−1) and isoflurane. On four occasions, the anaesthetised animals received fentanyl (1–3 µg kg−1 h−1) and ketamine (5–10 µg kg−1 min−1) infusions for analgesia. All animals recovered uneventfully. This case series details the anaesthetic protocols used, the challenges presented to the anaesthetist by this species and the peri‐anaesthetic complications observed. It also introduces the use of propofol total intravenous anaesthesia as an option for safe transportation of captive chimpanzees between facilities.

Opioid-Sparing Anesthesia Versus Opioid-Free Anesthesia for the Prevention of Postoperative Nausea and Vomiting after Laparoscopic Bariatric Surgery: A Systematic Review and Network Meta-Analysis.

Patients who undergo laparoscopic bariatric surgery (LBS) are susceptible to postoperative nausea and vomiting (PONV). Opioid-free anesthesia (OFA) or opioid-sparing anesthesia (OSA) protocols have been proposed as solutions; however, differences between the 2 alternative opioid protocols for anesthesia maintenance in obese patients remain uncertain. A network meta-analysis was conducted to compare the impacts of OFA and OSA on PONV. Systematic searches were conducted using Embase, PubMed, MEDLINE, and Cochrane Library databases to identify randomized controlled trials (RCTs) comparing OFA and OSA strategies. After screening according to the inclusion and exclusion criteria, we used the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) system to assess the credibility of the evidence. The main concern of this review was the difference between OFA and OSA in reducing PONV. The primary outcome was any PONV occurrence within 24 hours. Secondary outcomes included postoperative pain intensity, opioid consumption, opioid-related adverse events, and length of hospital stay. Fifteen RCTs involving 1310 patients were identified for a network meta-analysis from 1776 articles that compared OFA, OSA, and traditional opioid-based anesthesia (OBA) strategies in LBS. Twelve RCTs (80%) with 922 participants (70%) were eligible for the occurrence of PONV. These included 199 (22%) patients who received OFA and 476 (52%) and 247 (27%) patients who received OSA and OBA, respectively. OFA was more effective at reducing PONV (relative risks [RR], 0.6, 95% confidence interval [CI], 0.5-0.9, moderate-quality evidence) compared to OSA. No differences were observed in postoperative pain control or opioid consumption between the OFA and OSA strategies (very low-to high-quality evidence). Notably, OFA is associated with a higher risk of bradycardia than OSA (RR, 2.6, 95% CI, 1.2-5.9, moderate-quality evidence). OFA is more effective than OSA in reducing the occurrence of PONV during the early postoperative period of LBS, although it may associate with an increased risk of bradycardia. Patients who received either opioid-alternative strategy demonstrated similar effects in reducing postoperative opioid consumption and alleviating pain intensity.

Maternal and neonatal effects of epidural levobupivacaine combined with fentanyl or sufentanil for elective cesarean-section in brachycephalic breeds

The aim of this study was to compare the safety and clinical efficacy of epidural levobupivacaine combined with fentanyl or sufentanil for bitches undergoing elective cesarean-section and the impact of these anesthetic protocols on neonatal viability. The anesthetic protocol consisted of intramuscular morphine (0.2 mg/kg), followed by an intravenous bolus of propofol, in a dose sufficient to allowed the puncture of the lumbosacral space. The dogs were randomly allocated to receive 0.5% levobupivacaine plus fentanyl (2.5 µg/kg; LF: n = 9) or sufentanil (1 µg/kg; LS; n = 11). Maternal cardiorespiratory parameters were monitored at specific time points during surgery. Intraoperative propofol supplementation was based on the presence of head and/or thoracic limb movements. Neonatal reflex responses and the Apgar score (range 0-10 points) were assessed at 5 and 60 minutes after birth. Puppy mortality rate was recorded until 24 hours after birth. Data were analyzed using two-way ANOVA, Tukey's test, Wilcoxon signed rank test, and Fisher's exact test (P < 0.05). Intraoperatively, maternal cardiorespiratory variables and propofol requirements were similar between groups, with no detection of anesthetic complications. The puppy reflex responses did not differ between groups at any time point. The medians (range) of Apgar scores were lower (P = 0.016) in the LF [5 (1-9)] at 5 minutes in comparison with LS [6 (2-9)], while no intergroup differences were recorded at 60 minutes [LF = 8 (2-10); LS = 9 (6-10]. The total mortality rate was 4.1%. In the LS group, no puppies died, while in the LF 8% of the puppies died in the first 24 hours after birth (P = 0.11). Epidural levobupivacaine combined with fentanyl or sufentanil provided minimal maternal and neonatal adverse effects, but neither protocol enabled the performance of a C-section in 100% of the French and English bulldogs, without propofol supplementation.

High Tidal Volume, High Positive End Expiratory Pressure and Apneic Breath Hold Strategies (Lung Navigation Ventilation Protocol) With Cone Beam Computed Tomography Bronchoscopic Biopsy of Peripheral Lung Lesions: Results in 100 Patients.

A dedicated anesthesia protocol for bronchoscopic lung biopsy-lung navigation ventilation protocol (LNVP)-specifically designed to mitigate atelectasis and reduce unnecessary respiratory motion, has been recently described. LNVP demonstrated significantly reduced dependent ground glass, sublobar/lobar atelectasis, and atelectasis obscuring target lesions compared with conventional ventilation. In this retrospective, single-center study, we examine the impact of LNVP on 100 consecutive patients during peripheral lung lesion biopsy. We report the incidence of atelectasis using cone beam computed tomography imaging, observed ventilatory findings, anesthesia medications, and outcomes, including diagnostic yield, radiation exposure, and complications. Atelectasis was observed in a minority of subjects: ground glass opacity atelectasis was seen in 30 patients by reader 1 (28%) and in 18 patients by reader 2 (17%), with good agreement between readers (κ = 0.78). Sublobar/lobar atelectasis was observed in 23 patients by reader 1 and 26 patients by reader 2, also demonstrating good agreement (κ = 0.67). Atelectasis obscured target lesions in very few cases: 0 patients (0%, reader 1) and 3 patients (3%, reader 2). Diagnostic yield was 85.9% based on the AQuIRE definition. Pathology demonstrated 57 of 106 lesions (54%) were malignant, 34 lesions (32%) were benign, and 15 lesions (14%) were nondiagnostic. Cone beam computed tomography images confirmed low rates of atelectasis, high tool-in-lesion confirmation rate, and high diagnostic yield. LNVP has a similar safety profile to conventional bronchoscopy. Most patients will require intravenous fluid and vasopressor support. Further study of LNVP and other ventilation protocols are necessary to understand the impact of ventilation protocols on bronchoscopic peripheral lung biopsy.

Comparing the Efficacy of Various Anaesthesia Protocols for Caesarean Section in Dogs

Introduction. Caesarean section is attributed with frequent deaths among newborn puppies – up to 30%, depending on the chosen anaesthetic care and the presence of aggravating factors. The right choice of drugs and anaesthetic techniques can significantly affect the clinical outcomes. Because a standardised anaesthesia protocol for the caesarean section in dogs is missing in Russia, the research in this area is very relevant. The aim of the work is to compare three variants of the anaesthesia protocols across the basic clinical outcomes of a caesarean section delivery in a dog (including intra- and postoperative results, mortality rate) and to determine the most efficient and safe one for a bitch and puppies.Materials and Methods. The research was conducted at the premises of Rostov-on-Don veterinary clinic in the period from December 2021 to December 2023. There were selected 63 pregnant bitches who met the inclusion and exclusion criteria at that period of time. The animals were divided into three groups: in the first group the anaesthetic care included induction with propofol, intraoperative inhalation anaesthesia with sevoflurane and epidural lidocaine anaesthesia; in the second group the induction and maintenance of anaesthesia was performed with propofol, alongside the local anaesthesia with lidocaine was administered; the third group was administered propofol and inhalation anaesthesia with sevoflurane, excluding epidural anaesthesia. Monitoring was carried out according to the intraoperative indicators, post-anaesthesia recovery time, postoperative indicators of fear and pain, Apgar scores in puppies, the number of survivors and deaths in the short-term (30 minutes) and medium-term (during the day) periods.Results. The best intra- and postoperative indicators as well as the highest percentage of surviving puppies and the smallest number of stillbirths were revealed in patients of the first group. Medium results were recorded in the third group. The lowest intraoperative indicators in the function of cardiovascular and respiratory systems and the worst results as of hypoxia in newborn puppies were recorded in the second group of studied animals.Discussion and Conclusion. When determining the most efficient anaesthetic care for caesarean section in dogs, it should be borne in mind that propofol has a depressing effect on the respiratory and cardiovascular systems of patients, therefore its use is highly undesirable for the anaesthesia maintenance. Unlike propofol, sevoflurane does not penetrate the placenta barrier, is not metabolised and enables quick awakening of a bitch from anaesthesia. Moreover, in cases, when sevoflurane was used, the Apgar scores in the born puppies were the highest. Epidural anaesthesia with lidocaine reduces the postoperative pain of a bitch after caesarean section and has a positive effect on lactation. The use of epidural anaesthesia may be complicated with hypotension, however, the preventive use of crystalloid solutions, can mitigate this effect. Thus, the protocol with triple anaesthesia is optimal and preferable for caesarean section in dogs: induction with propofol, epidural anaesthesia with lidocaine and inhalation with sevoflurane to maintain anaesthesia.

Anesthesia, Anesthetics, and Postoperative Cognitive Dysfunction in Elderly Patients.

Postoperative cognitive dysfunction (POCD) remains a major issue that worsens the prognosis of elderly surgery patients. This article reviews the current research on the effect of different anesthesia methods and commonly utilized anesthetics on the incidence of POCD in elderly patients, aiming to provide an understanding of the underlying mechanisms contributing to this condition and facilitate the development of more reasonable anesthesia protocols, ultimately reducing the incidence of POCD in elderly surgery patients.

A retrospective comparison of postoperative outcomes in ovariectomised jennies (Equus asinus) treated with phenylbutazone or flunixin meglumine.

Clinically, flunixin meglumine (FM) and phenylbutazone (PBZ) are preferentially selected for the treatment of visceral and musculoskeletal pain, respectively, in horses. In donkeys, there is no information to support or refute this conventional conjecture. To compare postoperative outcomes in a group of jennies treated with intravenous FM or oral PBZ. Fourteen jennies unilaterally ovariectomised by standing left flank laparotomy. Retrospective cohort study. Data from medical records of ovariectomised jennies (case details, weight, non-steroidal anti-inflammatory drug [NSAID] protocol, surgery duration, operative sequence, anaesthesia protocol, physical examination findings and outcomes) were collected. From collated data, postoperative adverse events were defined as fever, tachycardia, tachypnea, inappetence, altered mentation, abnormal oral mucous membranes, bruxism, colic, incisional complications (i.e., drainage, oedema, peri-incisional emphysema and pain) and non-survival, then further divided into occurrence during the early (≤24 h) or late (>24 h) postoperative period for data analysis using R software. Chi-squared test was used to compare individual adverse events between groups (PBZ vs. FM) and moments (early vs. late). Significance was set at p ≤ 0.05. PBZ treatment (8/14) was associated with (odds ratio, 95% confidence interval) more total (2.93, 1.97-4.36), early (3.01, 1.87-4.84) and late (2.69, 1.28-5.63) adverse events than FM treatment (6/14). Tachycardia (37.83, 2.21-646.66), tachypnoea (0.29, 0.13-0.66), altered mentation (2.78, 1.01-7.67), altered mucous membranes (18.38, 1.04-325.23), incisional oedema (44.33, 2.60-754.5) and incisional pain (47.78, 2.81-811.61) were significantly different between groups. Early adverse events significantly different between groups included tachycardia (50.2, 2.9-877.0), altered mentation (3.33, 1.08-10.29) and incisional pain (21.0, 1.2-374.5), with late adverse events being tachypnea (0.07, 0.01-0.62), incisional oedema (32.92, 1.85-584.28) and incisional pain (28.92, 1.62-515.68). Colic (2/8) and non-survival (1/8) were rare events that only occurred in the PBZ cohort and could not be further evaluated for differences. Small sample size; retrospective study; treatment bias; varied administration routes. Oral PBZ may be inappropriate to use following abdominal surgery in donkeys. More prospective and case-controlled studies are needed to evaluate the clinical efficacy of these two NSAIDs in donkeys.

Influence of different intraoperative fluid management on postoperative outcome after abdominal tumours resection.

Intraoperative fluid management is a crucial aspect of cancer surgery, including colorectal surgery and pancreatoduodenectomy. The study tests if intraoperative multimodal monitoring reduces postoperative morbidity and duration of hospitalisation in patients undergoing major abdominal surgery treated by the same anaesthetic protocols with epidural analgesia. A prospective study was conducted in 2 parallel groups. High-risk surgical patients undergoing major abdominal surgery were randomly selected in the control group (CG), where standard monitoring was applied (44 patients), and the protocol group (PG), where cerebral oxygenation and extended hemodynamic monitoring were used with the protocol for intraoperative interventions (44 patients). There were no differences in the median length of hospital stay, CG 9 days (interquartile range [IQR] 8 days), PG 9 (5.5), p = 0.851. There was no difference in postoperative renal of cardiac impairment. Procalcitonin was significantly higher (highest postoperative value in the first 3 days) in CG, 0.75 mcg/L (IQR 3.19 mcg/L), than in PG, 0.3 mcg/L (0.88 mcg/L), p = 0.001. PG patients received a larger volume of intraoperative fluid; median intraoperative fluid balance +1300 ml (IQR 1063 ml) than CG; +375 ml (IQR 438 ml), p < 0.001. There were significant differences in intraoperative fluid management and vasopressor use. The median postoperative value of procalcitonin was significantly higher in CG, suggesting differences in immune response to tissue trauma in different intraoperative fluid status, but there was no difference in postoperative morbidity or hospital stay.

Postoperative outcomes after total sevoflurane inhalation sedation using a disposable delivery system (Sedaconda-ACD) in cardiac surgery.

The COVID-19 pandemic prompted our team to develop new solutions for performing cardiac surgery without intravenous anesthetics due to a shortage of these drugs. We utilized an anesthetic conserving device (Sedaconda-ACD) to administer total inhaled anesthesia because specific vaporizers were unavailable for administering inhaled agents during cardiopulmonary bypass (CPB) in our center. We documented our experience and postoperative cardiovascular outcomes. The primary outcome was the peak level of troponin, with secondary outcomes encompassing other cardiovascular complications. A single-center retrospective study was conducted. We performed a multivariate analysis with a propensity score. This investigation took place at a large university referral center. Adult patients (age ≥ 18) who underwent elective cardiac surgery with CPB between June 2020 to March 2021. During the inclusion period, two anesthesia protocols for the maintenance of anesthesia coexisted-total inhaled anesthesia with Sedaconda-ACD and our classic protocol with intravenous drugs during and after CPB. Troponin peak level recorded after surgery (highest level recorded within 48 h following the surgery). Out of the 654 included patients, 454 were analyzed after matching (intravenous group = 297 and inhaled group = 157). No significant difference was found between the groups in postoperative troponin peak levels (723 ng/l vs. 993 ng/l-p = 0.2). Total inhaled anesthesia was associated with a decreased requirement for inotropic medications (OR = 0.53, 95% CI 0.29-0.99, p = 0.04). In our cohort, the Sedaconda-ACD device enabled us to achieve anesthesia without intravenous agents, and we did not observe any increase in postoperative complications. Total inhaled anesthesia with sevoflurane was not associated with a lower incidence of myocardial injury assessed by the postoperative troponin peak level. However, in our cohort, the use of inotropic drugs was lower.

TÉCNICA DE ABOMASOTOMÍA PARA LA EXTRACCIÓN DE Haemonchus contortus EN CABRAS VIVAS

&lt;p&gt;&lt;strong&gt;Background:&lt;/strong&gt; Goats are increasingly being used as surgical models in animal experiments. Some ruminant parasitological studies require collecting adult nematodes directly from the abomasum of donor animals. A methodology to collect those adult worms &lt;em&gt;in vivo&lt;/em&gt; could avoid the unnecessary sacrifice of donor animals. &lt;strong&gt;Objective:&lt;/strong&gt; To describe an abomasotomy technique to obtain adult &lt;em&gt;Haemonchus contortus &lt;/em&gt;from live goats and evaluate the immediate post-surgical recovery time. &lt;strong&gt;Methodology:&lt;/strong&gt; Nine worm-free adult goats were infected with 6000 &lt;em&gt;H. contortus &lt;/em&gt;L3. The monospecific infection was confirmed on day 28 post-infection. The anesthetic procedure included fentanyl (10 μg * kg BW&lt;sup&gt;-1&lt;/sup&gt; load dose (LD) and 10 μg * kg BW&lt;sup&gt;-1&lt;/sup&gt; hour in constant-rate-infusion (CRI), lidocaine (2 mg * kg LD&lt;sup&gt;-1&lt;/sup&gt; and 50 μg * kg BW&lt;sup&gt;-1 &lt;/sup&gt;minute CRI), ketamine (1.5 mg * kg&lt;sup&gt;-1&lt;/sup&gt; and 50 μg * kg BW&lt;sup&gt;-1&lt;/sup&gt; min CRI) and propofol (4 mg * kg LD&lt;sup&gt;-1&lt;/sup&gt; and 0.4 mg * kg BW&lt;sup&gt;-1&lt;/sup&gt; min CRI). The surgical protocol consisted of eight “surgical time-points”. Purposeful animal movement in response to surgical stimulation, or any changes in the autonomic response (&amp;gt; 20% from baseline values of HR and arterial blood pressure (SAP, MAP, and DAP)) were used as criteria to identify trans-surgical nociception. Post-surgical pain was evaluated once daily with the wound healing evaluation. &lt;strong&gt;Results:&lt;/strong&gt; The surgical protocol lasted 1 h, allowing the recovery of adult &lt;em&gt;H. contortus &lt;/em&gt;from live goats. The anesthetic protocol successfully controlled trans-surgical pain, with only two animals crossing the HR threshold (&amp;gt;20%) from T2 to T6. Post-surgical recovery (“time to extubation” and “time to standing”) was achieved before 1 h, while animals consumed water after only 4 h post-surgery. Goats did not require rescue analgesia, and suture withdrawal was achieved 7 days post-surgery without complications. &lt;strong&gt;Impications:&lt;/strong&gt; The abomasotomy technique here described can be used for parasitological studies in small ruminants when the collection of nematodes is required from live animals. &lt;strong&gt;Conclusions:&lt;/strong&gt;  The anesthetic and surgical protocol here described is a viable and rapid alternative for the collection of nematodes from the abomasum of live goats with minimal pain and rapid postsurgical recovery.   &lt;/p&gt;

Are There Any Advantages of the Low Opioid Anaesthesia and Non-Opioid Postoperative Analgesia Protocol: A Clinical Observational Study.

The methods of perioperative analgesia and pain control have changed. The principle of opioid-based analgesia has been modified to multimodal analgesia, followed by LOA (low opioid anaesthesia) and OFA (opioid-free anaesthesia). The aim was to describe the effects of LOA on nausea, vomiting, and pain control during general anaesthesia and postoperative period after laparoscopic cholecystectomy. The protocol included the study group-40 patients received low-opioid anaesthesia (LOA), and the control group-40 patients received general anaesthesia with opioid analgesia (OA). The scheme of LOA was based on ketamine, lidocaine, magnesium sulfate, paracetamol, and metamizole. The OA was based on standard opioid (fentanyl) administration in induction and maintenance phase due to clinical observation. Postoperative analgesia included 1g of paracetamol and 1g of metamizol intravenously, with a 6-hour interval between doses. Significant differences in the pain score in the periods of 2-6, 6-12, and 12-24 hours after anaesthesia between the groups were noticed (p < 0.001). Moreover, a significant difference in the frequency of nausea (p = 0.005) and vomiting (p = 0.04) between groups were presented. Nausea occurred in 54.05% of OA group, while in the LOA group, it occurred in a 23.08%. Vomiting occurred in 32.43% of control group, while in the study group, it occurred in 12.82% of patients. The LOA protocol was more beneficial in reducing nausea and vomiting than the opioid-based method of anaesthesia. The LOA protocol of general anaesthesia during laparoscopic cholecystectomy and non-opioid postoperative analgesia have better outcomes in pain control, as well as nausea and vomiting, and improve postoperative patient comfort. The LOA protocol during anaesthesia and non-opioid postoperative analgesia should be considered in routine practice.

Comparison of different methods of local anesthesia for platelet rich plasma injections to scalp in patients with hair loss - A prospective study

Background: Platelet-rich plasma injection (PRP) for hair loss is a widely accepted treatment modality at present. The most common problem with PRP is the pain that is associated with the procedure. The type of anesthesia is decided mostly based on preference rather than protocol. Aims and Objectives: The current study was undertaken to establish a standardized anesthetic protocol for PRP based on the response of the patients undergoing the treatment plan. Materials and Methods: The study included 60 patients who underwent four sittings of PRP at 1-month intervals for hair loss treatment. The modality of anesthesia was different during each of the sessions - topical anesthesia, vibration anesthesia, nerve block, and ring block. The order of anesthetic modality was different in each patient, to avoid bias. Responses by the patients for the following questions related to anesthetic pain during the procedure was recorded and analyzed based on the type of anesthetic procedure adopted. Results: Vibration anesthesia had the highest mean intra procedure numerical pain scale value. Nerve block was the least acceptable modality with maximal problems including the pain of the local anesthetic injection and the unsightly visible bulge in the supra orbital region. Post procedural pain was highest for vibration anesthesia and least for ring block. Highest acceptance was seen with the ring block technique. Conclusion: This is a preliminary study aimed at standardizing the anesthetic protocol for PRP. This modality of treatment involves multiple sittings with long total duration. Improving patient comfort with adequate anesthesia will improve compliance to a great extent.

Effects of tasipimidine premedication with and without methadone and dexmedetomidine on cardiovascular variables during propofol-isoflurane anaesthesia in Beagle dogs

ObjectiveTo evaluate cardiovascular effects of oral tasipimidine on propofol-isoflurane anaesthesia with or without methadone and dexmedetomidine at equianaesthetic levels. Study designProspective, placebo-controlled, blinded, experimental trial. AnimalsA group of seven adult Beagle dogs weighing (mean ± standard deviation) 12.4 ± 2.6 kg and a mean age of 20.6 ± 1 months. MethodsThe dogs underwent four treatments 60 minutes before induction of anaesthesia with propofol. PP: placebo orally and placebo (NaCl 0.9%) intravenously (IV); TP: tasipimidine 30 μg kg–1 orally and placebo IV; TMP: tasipimidine 30 μg kg–1 orally and methadone 0.2 mg kg–1 IV; and TMPD: tasipimidine 30 μg kg–1 orally with methadone 0.2 mg kg–1 and dexmedetomidine 1 μg kg–1 IV followed by 1 μg kg–1 hour–1.Isoflurane in oxygen was maintained for 120 minutes at 1.2 individual minimum alveolar concentration preventing motor movement. Cardiac output (CO), tissue blood flow (tbf), tissue oxygen saturation (stO2) and relative haemoglobin content were determined. Arterial and mixed venous blood gases, arterial and pulmonary artery pressures and heart rate (HR) were measured at baseline; 60 minutes after oral premedication; 5 minutes after IV premedication; 15, 30, 60, 90 and 120 minutes after propofol injection; and 30 minutes after switching the vaporiser off. Data were analysed by two-way anova for repeated measures; p < 0.05. ResultsTasipimidine induced a significant 20–30% reduction in HR and CO with decreases in MAP (10–15%), tbf (40%) and stO2 (43%). Blood pressure and oxygenation variables were mainly influenced by propofol-isoflurane-oxygen anaesthesia, preceded by short-lived alterations related to IV methadone and dexmedetomidine. Conclusions and clinical relevanceTasipimidine induced mild to moderate cardiovascular depression. It can be incorporated into a common anaesthetic protocol without detrimental effects in healthy dogs, when anaesthetics are administered to effect and cardiorespiratory function is monitored.

Fast-track anesthesia and outcomes in hepatopancreatic cancer surgery: a retrospective analysis

AimTo assess the feasibility of a fast-track anesthesia protocol for hepatopancreatobiliary cancer surgery.MethodsRetrospective analysis of consecutive sample of patients who underwent hepatopancreatic surgery for cancer for a period of 12 months in a high volume cancer center. Blended anesthesia was performed for most patients who were then observed in a recovery room area until achieving a safety score.ResultsData of 163 patients were examined. Fifty-six and 107 patients underwent surgery for pancreatic cancer and liver surgery for primary tumor or metastases, respectively. Most patients were ASA 3. The mean durations of anesthesia and surgery were 322 min (SD 320) and 296 min (SD 133), respectively. Extubation was performed in the operating room in 125 patients. Post-operatory invasive ventilation was maintained in the recovery room in fifteen patients for a mean duration of 72.7 min (SD148.2). Only one patient was admitted to intensive care for 15 h. NIV was performed in three patients for a mean duration of 73.3 min (SD 15.3). The mean recovery room staying was 79 min (SD 80). The mean hospital postoperative stay was a mean of 8.1 days (SD 5.7). No complications were found in 144 patients. Globally, mortality rate was 3%.ConclusionA program of fast-track anesthesia with a short stay in recovery room allowed to achieve a good outcome, limiting the costs of intensive care admission.

Tiletamine-Zolazepam, Ketamine, and Xylazine Anesthetic Protocol for High-Quality, High-Volume Spay and Neuter of Free-Roaming Cats in Seoul, Korea.

This study was performed to evaluate the anesthetic protocol used in the high-quality, high-volume spay and neuter (HQHVSN) of free-roaming cats in Seoul, Korea from 2017 to 2022. The evaluation was performed on a total of 1261 free-roaming cats, with an average weight of 3.48 ± 1.04 kg. The anesthetic combination tiletamine-zolazepam, ketamine, and xylazine (ZKX) was injected intramuscularly. The actual drug doses administered were tiletamine-zolazepam 5.52 ± 1.70 mg/kg, ketamine 8.94 ± 3.60 mg/kg, and xylazine 1.11 ± 0.34 mg/kg. Additional doses were required in 275 cats out of a total of 1261 (21.8%). Following anesthesia and surgery, 1257 cats (99.7%) were returned to their original locations. Four cats (0.3%) died postoperatively. The mean duration of anesthesia (from ZKX combination to yohimbine administration) was 26 ± 22 min for males and 55 ± 36 min for females, while the time from yohimbine administration to the recovery was 31 ± 22 min for males and 20 ± 17 min for females. The use of ZKX for HQHVSN of free-roaming cats is inexpensive, provides predictable results, can be administered quickly and easily in a small volume, and is associated with a low mortality rate during the first 72 h post-surgery.

Protocol for a prospective comparative randomized clinical study for the comparison of two different doses of dexmedetomidine with bupivacaine in pediatric caudal anesthesia for infraumbilical surgeries in a tertiary hospital in central India

Background Pediatric caudal anesthesia is a well-established technique for providing intraoperative and postoperative pain relief in children undergoing infraumbilical surgeries. Dexmedetomidine, an α2-adrenergic agonist, has shown promise as an adjuvant to local anesthetics in caudal blocks, potentially improving the quality and duration of pain relief. This study aims to compare two doses of dexmedetomidine with bupivacaine to assess their efficacy in pediatric caudal anesthesia. Methods A prospective comparative randomized clinical study will be conducted over two years in the Department of Anaesthesiology at Jawaharlal Nehru Medical College (JNMC) and Acharya Vinoba Bhave Rural Hospital (AVBRH) in Central India. Patients aged six months to six years, with American Society of Anesthesiologists (ASA) Class 1 or 2, scheduled for infraumbilical surgeries, will be included. They will be randomly allocated to receive either Group A (1 ml/kg of 0.25% bupivacaine with 1 μ/kg dexmedetomidine) or Group B (1 ml/kg of 0.25% bupivacaine with 0.5 μ/kg dexmedetomidine) in a double-masked fashion. The primary outcome is the duration of postoperative pain relief. Secondary outcomes include intraoperative hemodynamic stability, time first to rescue analgesia, incidence of adverse effects, and patient and parent satisfaction. A cost-effectiveness analysis will also be conducted. Conclusions The study will provide insights into the efficacy and safety of different doses of dexmedetomidine in pediatric caudal anesthesia for infraumbilical surgeries. The results will guide clinical practice and inform anesthesia protocols for pediatric patients in the study setting. Registration CTRI (CTRI/2023/05/057050; 29 August 2023).

Anesthesia in domestic rabbits (Oryctolagus cuniculus)

The following text addresses specific challenges in rabbit anesthesia, highlighting drug sensitivity. It also explores anesthetic protocols and particularities, such as catheterization and stress during anesthesia, as well as challenges in intubation. It highlights multimodal analgesia, drug combinations, and monitoring methods to ensure safe procedures, emphasizing the need for individual analysis of each patient, in order to follow the best anesthetic plan.

Efficacy of Preemptive Analgesia with Amantadine for Controlling Postoperative Pain in Cats Undergoing Ovariohysterectomy.

This study aimed to evaluate the effect of the preemptive administration of amantadine on postoperative analgesia in cats undergoing ovariohysterectomy and its influence on the physiological parameters. Twenty healthy domestic cats scheduled to undergo ovariohysterectomy at the Santa Cruz State University, Ilhéus, were divided into two groups: the control group (Group C; n = 10) and the amantadine group (Group A; n = 10). The cats in Group C received placebo capsules 30 min prior to the standard anesthetic protocol, whereas those in Group A received 5 mg/kg of amantadine orally 30 min prior to the standard anesthetic protocol. Postoperative pain was assessed using the visual analog scale and the UNESP-Botucatu multidimensional scale for the evaluation of postoperative pain in cats. The administration of amantadine had no effect on the physiological parameters evaluated. The pain scores in Group A were lower than those in Group C, indicating that the frequency of rescue analgesic administration cats in Group A was lower. That way, preemptive oral administration of amantadine at a dose of 5 mg/kg was effective at controlling postoperative pain in cats undergoing ovariohysterectomy. Moreover, no adverse effects or alterations in the physiological patterns were observed in the treated animals.