Adequate Anesthesia Research Articles

Lidocaine nebulization for airway topical anesthesia can be improved by diminish ex-cannula lost and alkalization

Lidocaine nebulization is noninvasive, safe, and easy to perform. However, it does not provide adequate anesthesia due to the following reasons: 1. There is a high wastage of lidocaine aerosol, with at least 70 % of the lidocaine aerosol being lost from the cannula. This loss of lidocaine results in a lower amount of inhaled lidocaine, which is insufficient to provide adequate anesthesia. 2. The commercial lidocaine preparation has a low penetrating potency. The onset of anesthesia is directly related to the amount of local anesthetic in the lipid-soluble form. However, there are only a few lipid-soluble prototypes in the commercially available lidocaine cartridges. This is because the lidocaine is purposely formulated as acidic solutions (with pH levels between 3.5 and 5.5) in order to enhance the solubility and stability of the anesthetic salts. To address these issues and improve lidocaine anesthesia potency while reducing wastage, a “Y” type cannula was used for aerosol inhalation. Additionally, 1/5 vol of 5 % sodium bicarbonate solution was added to 2 % lidocaine to enhance the pH value to 7.2. This alkalized lidocaine nebulization provides an effective topical anesthesia for bronchoscopy.

Ultrasound-Guided Lumbar Plexus-Sciatic Nerve Blocks Versus Epidurals for Orthopaedic Surgeries: A Study to Compare the Competency of Novice Anaesthesiology Residents in a High-Volume Level 1 Trauma Centre.

The relative merits of peripheral nerve blocks (PNB) over central neuraxial anaesthesia and the advantages of the above two techniques over general anaesthesia for surgical interventions of the lower limb are well established. The competency of anaesthetic trainees in a high-volume level 1 trauma centre in administering dual ultrasound and nerve stimulator-guided lumbar plexus-sciatic nerve block(DUNLuPS) vs. epidural anaesthesia (EA) was compared by reporting the adequacy of anaesthesia with the two techniques, time taken for the performance of block, time of onset of sensoryblock (TOSB), and time of onset of motor block (TOMB). This prospective, randomized, study enrolled 92 patients aged 18-80 years with lower limb fractures admitted in trauma triage and scheduled for surgery. Thepatients were randomly allocated equally into the EA group and the DUNLuPS group. A total of 20 anaesthesia trainees in the third year of residencywith clinical experience of more than 15 independent lumbar plexus-sciatic nerve blocks were included in the study.A volume of 20 ml of 0.5% ropivacaine was administered in the lumbar plexus (Shamrock technique) but the volume used for sciatic nerve (subgluteal approach) was varied so that the cumulative dose did not exceed 3 mg/kg. For each block, the onset of nerve blockade was assessed every five minutes, and the assessments continued for an additional 30 minutes after the nerve blocks were finished. Clinical characteristics and adequacy of anaesthesia were comparable, i.e., 95.65% and93.47% success in the EA (n = 46) and DUNLuPS (n = 46) groups, respectively. Performance time was significantly more in the DUNLuPS group but followed by significantly less TOSB and TOMB. The time for the first analgesic request was 351.63 ± 148.70 minutes in the DUNLuPS group and 147.60 ± 52.65 minutes in the EAgroup (p < 0.0001). Both EA and DUNLuPS provide effective and comparable intra-operative anaesthesia for orthopaedic lower limb surgeries (OLLS) when administered by residents with more than two years of experience (third year of residency)in ultrasound-guided regional nerve blocks in a high-volume level 1 trauma centre. Statistically significant differences in the block performance characteristicshad no clinical advantage as it was compensated by the faster onset time in the DUNLuPS group. Post-operative pain management was better in the DUNLuPS group, sothe practice and conduct of anaesthesia for trauma patients should focus on the establishment of "block rooms" and timely training of residents in the former so that the advantages can be extended to the patient population.

Median effective dose of spinal ropivacaine in combined spinal and epidural anesthesia for emergency cesarean delivery following failed vaginal delivery with epidural labor analgesia: a single-blind, sequential dose-finding study.

This study aimed to estimate the median effective dose of intrathecal isobaric ropivacaine without opioid required for adequate cesarean delivery anesthesia after epidural labor analgesia. Patients aged 20-40years with American Society of Anesthesiology scores of I-II, body mass index ≤ 36, who underwent emergency cesarean delivery after failed vaginal delivery with epidural analgesia of a duration ≤ 6h were included in the study. After removal of the epidural used for labor analgesia, a new combined spinal epidural was performed, and a dose of intrathecal isobaric ropivacaine without opioid was administered. The dose was determined using up-down methodology, with the starting patient's dose set to 12mg. Adequate anesthesia, defined as a pinprick level no lower than T6 at 5min after ropivacaine administration, resulted in the next patient receiving a dose of ropivacaine 1mg higher, and inadequate anesthesia 1mg lower. The primary outcome was the median (95% confidence interval (CI)) dose of spinal ropivacaine required for adequate cesarean delivery anesthesia. Of the 46 patients included in the study, 40 were analyzed. The median spinal ropivacaine dose was 8.11mg (95% CI 7.29-8.93mg) by the Dixon and Mood method and 8.06mg (95% CI 6.93-9.00mg) by isotonic regression. Two patients had high spinal anesthesia. Our findings suggest that for 50% of patients undergoing cesarean delivery after failed vaginal delivery with epidural analgesia, an 8-mg spinal dose of isobaric ropivacaine without opioid provides an anesthesia level no lower than T6 at 5min.

Clinical evaluation of bispectral index‐guided closed‐loop infusion of propofol for preschool children: A multi‐center randomized controlled study

ABSTRACTImportanceThe closed‐loop infusion system can automatically adjust and maintain the depth of anesthesia by using the propofol target‐controlled infusion (TCI) model under the feedback guidance of the bispectral index (BIS).ObjectiveTo evaluate the safety and superiority of closed‐loop TCI of propofol guided by BIS during maintenance of generalized intravenous anesthesia for preschool children.MethodsA total of 120 children aged 1–6 years were enrolled and were divided into a closed‐loop feedback group (Group C) and an open‐loop manual control group (Group O), with 60 participants in each group. For anesthesia maintenance, the propofol infusion rate was adjusted by the injection system under the guidance of BIS in Group C and was manually adjusted by anesthesiologists according to the BIS and clinical experience in Group O, to maintain a BIS level of 50. The time ratio of adequate anesthesia (40 ≤ BIS ≤ 60), light anesthesia (BIS &gt; 60), and deep anesthesia (BIS &lt; 40) were recorded.ResultsA total of 119 patients (59 in Group C and 60 in Group O) were enrolled in the study. Group C demonstrated a higher time ratio of adequate anesthesia (P = 0.014) compared to Group O. The time ratio of light anesthesia and the global score was lower in Group C than in Group O (P = 0.010, P = 0.015, respectively). The frequency of adjustment per unit of time was higher in Group C for propofol (P &lt; 0.001), while it was lower for remifentanil (P = 0.010).InterpretationBIS‐guided closed‐loop infusion of propofol is safe and effective for preschool children. The depth of anesthesia is controlled more accurately and smoothly.

A Comparative Study of Combined Spinal Epidural Anesthesia Versus Spinal Anesthesia in Major Lower Limb Orthopedic Surgeries.

Background Neuraxial blockade includes epidural and spinal anesthesia (SA) that have gained wide acceptance for major lower limb orthopedic surgery. Both techniques are competent in rendering surgical anesthesia and pain relief, with specific advantages and disadvantages. SA has the merits of rapid onset and adequate anesthesia with a small volume of the drug but has significant hypotension and unpredictable duration. Epidural anesthesia allows for finer control over analgesia and the duration of anesthesia but requires more substantial volumes of drugs and is slower in onset. Combined spinal-epidural anesthesia (CSEA) combines the rapid commencement of action of SA with flexibility in epidural anesthesia, thus optimizing the management of the intraoperative and postoperative phases. This study aims to evaluate hemodynamic changes, compare the severity and duration of sensory and motor block, and track any problems related to CSEA and SA in major lower limb orthopedic procedures. Additionally, this study contrasts the hemodynamic, motor, and sensory changes in the two groups. Methodology A total of 30 individuals were randomized to one of two groups in this prospective comparative trial, which included 60 patients receiving major lower limb orthopedic surgery and meeting the American Society of Anesthesiologists physical status I-II criteria. Group A received CSEA, and Group B received SA. The degree and duration of sensory and motor blockade, hemodynamic changes, and complications were all recorded. A p-value of less than 0.05 was used to evaluate statistical significance using Student's t-test and chi-square test. Results The onset of sensory block in our study was earlier in Group B compared to Group A. In both groups, hemodynamic stability was maintained throughout the study. We recorded the onset/duration of sensory and motor block and hemodynamic changes and took mean values to find any significant difference. Postoperative complications and rescue analgesic requirements were monitored and managed and were a part of our study. Conclusions This study compared CSEA and SA regarding the severity and duration of sensory and motor block, hemodynamic stability, and associated complications in major lower limb orthopedic surgeries. The results shed light on the advantages and shortcomings of each anesthesia technique and, therefore, will help choose the correct method of anesthesia in a given surgery.

Accessing the efficacy and peri-operative adverse effects of three different hyperbaric bupivacaine 0.5% dosages for spinal anesthesia induction in lower limb orthopedic surgeries: a randomized clinical trial

BackgroundSpinal anesthesia (SA) is a conventional method for proper nerve block in abdominopelvic and lower extremity surgeries. Compared to general anesthesia, SA has reduced perioperative complications significantly. The hyperbaric type of bupivacaine hydrochloride (HB) induces spinal anesthesia more efficiently with a lower incidence of life-threatening adverse reactions like Perioperative hemodynamic changes and respiratory depression. More investigations are needed to define the best dosage that provides adequate anesthesia while reducing adverse effects for each surgical procedure.MethodsThis double-blinded randomized clinical trial compared the consequences of the (12.5mg,15mg,20mg) dosages of HB-bupivacaine in elective lower limb orthopedic surgery. Using block randomization, we allocated 60 participants to three (n = 20) study groups. Utilizing the same protocol of anesthesia induction, outcome variables assumed and measured as the incidence of the adverse effects (Hypotension, Anxiety, Bradycardia, Nausea and Vomiting(N/V), Hypoventilation, and Decreased o2 saturation), and the requirement for intervention to control the unwanted reaction. Addressing that, outcome variables were measured 10 times perioperatively. One-way ANOVA test, the chi2 test, or repeated measures ANOVA test with the Bonferroni adjustment were utilized as appropriate.ResultsWe found that the incidence of hypotension (P-value:0.02) and the N/V (P-value < 0.001) are associated with the HB-bupivacaine dosage. Contrary, our findings indicate that the incidence of apnea, bradycardia, and hypoventilation did not exhibit a significant dose-dependent pattern between the groups. Repeated measures analysis revealed significant intergroup differences for Herat rate, systolic, diastolic, and mean arterial pressure (group*time Pvalue < 0.001). The observed differences were more prominent 10–30 min after injection of HB-bupivacaine. The regression model claimed that gender (P-value:0.002) and drug dosage (P-value:0.03) significantly predict the incidence of adverse effects.ConclusionOur results, suggest that the administration of the 12.5mg HB-bupivacaine provides adequate anesthesia while minimizing the risk of adverse events for lower limb orthopedic surgeries lasting up to 180 min.Trial registrationThe study was registered at the Clinical Trial Registry Center (IRCT20160202026328N7), Registered on 2022.01.10.

Pain Management Following Intracavitary Brachytherapy Procedures: A Prospective, Randomized, Double-Blind Study.

Background and objectives Intracavitary applicators are a source of significant discomfort after brachytherapy procedures while undergoing subsequent radiation treatment. With strides towards opioid-sparing anesthesia and analgesia, it's essential to find appropriate substitutes. This procedure requires adequate relaxation of pelvic muscles during the procedure and proper analgesia after the procedure, with the presence of intracavitary applicators, needed for radiation treatment. We studied the day-case safety and analgesic efficacy of adjuvants dexmedetomidine 3 µg and fentanyl 15 µg intrathecally to low-dose 0.5% hyperbaric bupivacaine. Methods Seventy females scheduled for brachytherapy procedures were randomly allocated to receive either Group I (0.5% hyperbaric bupivacaine (1.8 ml) plus 3µg dexmedetomidine (0.3ml)) or Group II (0.5% hyperbaric bupivacaine (1.8 ml) plus 15µg fentanyl (0.3ml)). The primary outcome was to assess and compare the brachytherapy (day-case) feasibility with 3µg dexmedetomidine and 15µg fentanyl (time taken to meet hospital discharge criteria). The secondary outcomes were the absolute duration of spinal analgesia, pain scores, patient satisfaction scores, and any associated adverse events. Data analysis was done using IBM SPSS software for Windows, version 21.0 (IBM Corp., Armonk, NY). Results All patients in Group I were discharged on the same day without any adverse effects. They underwent an intracavitary brachytherapy procedure under spinal anesthesia with stable hemodynamics successfully. The mean time taken to meet hospital discharge criteria in Group II was shorter than in Group I (258.43 ± 27.460 vs. 335.71 ± 21.114). The mean absolute duration of spinal analgesia was significantly longer in Group I as compared to Group II (406.82 ± 51.78 mins vs. 267 ± 16.23 mins) (p<.001). Seventeen patients required rescue analgesia in Group II versus eight in Group I (p<0.025). Conclusion Patients in both groups received excellent analgesia with enhanced patient satisfaction. Three µg intrathecal dexmedetomidine as an adjuvant to low-dose hyperbaric bupivacaine can be used safely in day-case brachytherapy procedures. It provides adequate anesthesia and prolonged spinal analgesia as compared to 15 µg fentanyl.

Ultrasound-guided thoracic nerve blocks for emergency department patients with rib fractures: a review

BackgroundRib fractures are frequently diagnosed and treated in the emergency department (ED). Thoracic trauma has serious morbidity and mortality, particularly in older adults, with complications including pulmonary contusions, hemorrhage, pneumonia, or death. Bedside ED-performed ultrasound-guided anesthesia is gaining in popularity, and early and adequate pain control has shown improved patient outcomes with rare complications. Objective of the ReviewWe describe thoracic nerve block options that can be used clinically for rib fractures or other thoracic pain or trauma. We identify the pros and cons of each type of block, describe their risk profile and advantages, and summarize the steps on how each is performed. DiscussionThoracic epidural and paravertebral blocks are more invasive, targeting the nerves closer to the spinal cord, thus they are primarily used in the operating room or by anesthesiology for surgical cases. However, newer blocks are gaining in popularity, particularly the erector spinae block (ESP), serratus anterior plane nerve block (SANB), and intercostal nerve block (ICNB). These blocks provide adequate anesthesia and can be performed in an ED setting. ConclusionsThoracic nerve blocks (e.g. ESP, SANB, ICNB) can be performed safely by appropriately trained emergency physicians, provide excellent anesthesia for rib fractures and thoracic trauma, and should be strongly considered for improved patient-centered outcomes. Furthermore, performing regional nerve blocks in the emergency department can reduce complications including adverse effects from opioids or other delirium-inducing medications.

The influence of intraoral cryotherapy on postoperative pain and substance P in symptomatic apical periodontitis: randomized clinical study

Cryotherapy is widely utilized in medicine, particularly for pain management. This randomized clinical trial aimed to assess the effect of intraoral cold pack application (cryotherapy) on postoperative pain (POP) and the level of Substance P (SP) in patients with symptomatic apical periodontitis (SAP). Enrolled patients were randomly assigned to either cryotherapy or control group. After adequate anesthesia, access cavity, and biomechanical preparation of the root canal system were completed, the first apical fluid (AF) sample (S1) was obtained. A custom-made intraoral ice-gel pack was applied for 30 min in the cryotherapy group, while no intervention was performed in the control group. The second AF sample (S2) was collected 30 min later in both groups. Patients were asked to complete the Visual Analogue Scale (VAS) questionnaire to assess their POP. Quantification of SP in AF samples was performed using the enzyme-linked immunosorbent assay (ELISA) test. Data were analyzed statistically, revealing a significant reduction in POP and SP levels in the cryotherapy group compared to the control group (P ≤ 0.05). Furthermore, a moderate positive correlation was observed between SP levels and POP (P ≤ 0.05). In conclusion, intraoral cryotherapy represents a simple and cost-effective option for controlling POP and reducing inflammation levels in patients with SAP.

Axillary Brachial Plexus Block Compared with Other Regional Anesthesia Techniques in Distal Upper Limb Surgery: A Systematic Review and Meta-Analysis.

Background: Several regional anesthesia (RA) techniques have been described for distal upper limb surgery. However, the best approach in terms of RA block success rate and safety is not well recognized. Objective: To assess and compare the surgical anesthesia and efficacy of axillary brachial plexus block with other RA techniques for hand and wrist surgery. The attainment of adequate surgical anesthesia 30 min after block placement was considered a primary outcome measure. Additionally, successful block outcomes were required without the use of supplemental local anesthetic injection, systemic opioid analgesia, or the need to convert to general anesthesia. Methods: We performed a systematic search in the following databases: MEDLINE, EMBASE, Cochrane Database of Systematic Reviews, and CENTRAL. RCTs comparing axillary blocks with other brachial plexus block techniques, distal peripheral forearm nerve block, intravenous RA, and the wide-awake local anesthesia no tourniquet (WALANT) technique were included. Results: In total, 3070 records were reviewed, of which 28 met the inclusion criteria. The meta-analysis of adequate surgical anesthesia showed no significant difference between ultrasound-guided axillary block and supraclavicular block (RR: 0.94 [0.89, 1.00]; p = 0.06; I2 = 60.00%), but a statistically significant difference between ultrasound-guided axillary block and infraclavicular block (RR: 0.92 [0.88, 0.97]; p < 0.01; I2 = 53.00%). Ultrasound-guided infraclavicular blocks were performed faster than ultrasound-guided axillary blocks (SMD: 0.74 [0.30, 1.17]; p < 0.001; I2 = 85.00%). No differences in performance time between ultrasound-guided axillary and supraclavicular blocks were demonstrated. Additionally, adequate surgical anesthesia onset time was not significantly different between ultrasound-guided block approaches: ultrasound-guided axillary blocks versus ultrasound-guided supraclavicular blocks (SMD: 0.52 [-0.14, 1.17]; p = 0.12; I2 = 86.00%); ultrasound-guided axillary blocks versus ultrasound-guided infraclavicular blocks (SMD: 0.21 [-0.49, 0.91]; p = 0.55; I2 = 92.00%). Conclusions: The RA choice should be individualized depending on the patient, procedure, and operator-specific parameters. Compared to ultrasound-guided supraclavicular and infraclavicular block, ultrasound-guided axillary block may be preferred for patients with significant concerns of block-related side effects/complications. High heterogeneity between studies shows the need for more robust RCTs.

Analysis of anesthetic protocols during cesarean section in dogs: a systematic review

There are many problems associated with uncontrolled artificial breeding of dogs, which lead to anatomical abnormalities. In the literature, there is a tendency for dog breeds to appear that have anatomical and physiological changes that lead to the development of pathological childbirth. In populations of breeds with a particularly high risk of dystocia, such as the English Bulldog, the frequency of planned cesarean sections can approach 80%, therefore it is necessary to take a responsible approach to the formation of anesthetic protocols. Thus, the survival rate of newborns and the state of the maternal body depend on this. Anesthesia protocols adopted for cesarean section should provide adequate muscle relaxation, anesthesia and anesthesia to ensure optimal working conditions. The use of opioid analgesics helps to ensure adequate pain control during cesarean section. One of the most commonly used opioids during this surgery in dogs is morphine. The dosage of morphine may vary depending on the size of the dog and the degree of pain. When performing a cesarean section, it is recommended to use drugs that do not cause neonatal depression. It is noted that epidural anesthesia reduces the need for intraoperative analgesics without causing severe neonatal depression. The main drugs that can be used in the preparation of an anesthesiological protocol during cesarean section are propofol, isoflurane, sevoflurane, lidocaine, morphine, fentanyl. The results of the analysis of the literature data showed the effectiveness of the use of drugs from different groups of medicines.

Incidence of hypotension in lower segment Caesarean section - a comparison of intrathecal Fentanyl- Bupivacaine combination with Bupivacaine alone

Introduction: After subarachnoid block with conventional heavy Bupivacaine, hypotension is the most common complication and is caused by decrease in systemic vascular resistance and/or cardiac output. Even with standard doses of the drug for parturient, there are evidences of severe hypotension and other complications despite adequate analgesia and anaesthesia. Adjuvants are used to enhance the quality of blocks with less complications. Objectives: It was to evaluate the effectiveness of combining bupivacaine and fentanyl for spinal anesthesia during lower segment Caesarean section (LSCS) as opposed to using bupivacaine alone for the incidence of hypotension. Methodology: This is a prospective study of 210 patients aged 18-35 years of American society of Anesthesiologists Physical Status II undergoing elective lower segment Caesarean section, randomly assigned to two groups: Group A, received a mixture of intrathecal 2ml of 0.5% Bupivacaine and 10 mcg Fentanyl(2.2ml) and Group B, received only 2.2 ml of Bupivacaine. Noninvasive blood pressure was checked at 1,2,4,6,10,20,40 and 60 min after subarachnoid block and then post-surgery. Results: The occurrence of hypotension was higher in Group B (26.6%) compared to Group A (8.6%). Conclusion: Our study suggests that the intrathecal Fentanyl-Bupivacaine combination is effective in reducing the incidence of hypotension after SAB for elective LSCS. Additional research is needed to determine this combination’s optimal dosage and timing.

A Comparative Study to Evaluate the Efficacy of Topical and Infiltrative Anesthesia for Dermatosurgery Through a Subject-Oriented Approach.

Introduction The skin, along with its subcutaneous tissue, constitutes one of the major organ systems of the human body. Dermatosurgery is the branch dealing with skin conditions that operate at the level of skin, without disturbing the milieu intérieur of the human organ system. Materials and methods A cross-sectional study was undertaken, which included 100 patients comprised of 50 patients in each group. For group A, the topical anesthetic agent used was a eutectic mixture of topical 2.5% lignocaine and 2.5% prilocaine cream (EMLA); for group B, infiltration anesthesia with 2% lignocaine injection. Patients satisfying the inclusion and exclusion criteria were recruited for the study. All the participants were requested to rate the pain at the time of drug administration, during the dermatosurgical procedure, and post-procedurally with a visual analogue scale (VAS) separately. Results In this study, 50% of the participants were of the age group of 21-40 years. Males constituted 57.8% whereas females constituted 42.2%. The common procedures performed in the study were electrocautery at 37%, intralesional platelet-rich plasma (PRP) at 16%, and intralesional steroid at 7%. In group A, the VAS score during drug administration was 0. In the group B, 70% had a VAS score of 4-6, and 30% had a VAS score of 1-3 pre-procedurally. The mean VAS score during procedure was 3.06 for group A and 1.03 for group B. Conclusion The study inferred that topical anesthesia is a better choice in superficial dermatosurgical procedures for providing adequate anesthesia and improved compliance when compared to infiltrative anesthesia.

Super-refractory status epilepticus, rhabdomyolysis, central hyperthermia and cardiomyopathy attributable to spinal anesthesia: a case report and review of literature

BackgroundThere are only six past reports of super-refractory status epilepticus induced by spinal anesthesia. None of those patients have died. Only < 15 mg of bupivacaine was administered to all six of them and to our case. Pathophysiology ensuing such cases remains unclear.Case presentationA 27 year old gravida 2, para 1, mother at 37 weeks of gestation came to the operating theater for an elective cesarean section. She had no significant medical history other than controlled hypothyroidism and one episode of food allergy. Her current pregnancy was uneventful. Her American Society of Anesthesiologists (ASA) grade was 2. She underwent spinal anesthesia and adequate anesthesia was achieved. After 5–7 min she developed a progressive myoclonus. After delivery of a healthy baby, she developed generalized tonic clonic seizures that continued despite the induction of general anesthesia. She had rhabdomyolysis, one brief cardiac arrest and resuscitation, followed by stress cardiomyopathy and central hyperthermia. She died on day four. There were no significant macroscopic or histopathological changes in her brain that explain her super refractory status epilepticus. Heavy bupivacaine samples of the same batch used for this patient were analyzed by two specialized laboratories. National Medicines Quality Assurance Laboratory of Sri Lanka reported that samples failed to confirm United States Pharmacopeia (USP) dextrose specifications and passed other tests. Subsequently, Therapeutic Goods Administration of Australia reported that the drug passed all standard USP quality tests applied to it. Nonetheless, they have detected an unidentified impurity in the medicine.ConclusionsAfter reviewing relevant literature, we believe that direct neurotoxicity by bupivacaine is the most probable cause of super-refractory status epilepticus. Super-refractory status epilepticus would have led to her other complications and death. We discuss probable patient factors that would have made her susceptible to neurotoxicity. The impurity in the drug detected by one laboratory also would have contributed to her status epilepticus. We propose several possible mechanisms that would have led to status epilepticus and her death. We discuss the factors that shall guide investigators on future such cases. We suggest ways to minimize similar future incidents. This is an idiosyncratic reaction as well.Graphical

Effects of addition of fentanyl to lidocaine plus adrenaline during peribulbar anaesthesia for cataract surgery: A prospective study

Background: Local anaesthesia is most commonly used for cataract surgery in adult patients. Different combinations of local anesthetic agents and adjuvants have been used to provide adequate anaesthesia and analgesia. This study assessed the effect of adding 25 µg fentanyl to lidocaine with adrenaline mixture on the onset and duration of anaesthesia in adult patients undergoing cataract surgery under peribulbar anaesthesia. Methods: This was a double blind, randomized controlled study. Adult patients aged 40 years and above with American Society of Anesthesiologists Physical Status Classes 1 and 2 undergoing cataract surgery under peribulbar block (PB) were studied. Sixty-six patients were randomized into two equal groups. Group A had 25 µg fentanyl (0.5 mL) added to 6 mL of 2% lidocaine with adrenaline while Group B had sterile water 0.5 mL added to 6 mL of 2% lidocaine with adrenaline for PB. Onset and duration of lid akinesia, globe akinesia, globe anaesthesia, Numerical Rating Scale (NRS) pain score, time to analgesia request as well as patient and surgeon satisfaction were assessed. Results: The differences in the onset of lid akinesia, globe akinesia, and globe anaesthesia between the two groups were statistically significant (P ≤ 0.001, respectively). The mean duration of globe akinesia and globe anaesthesia was longer in Group A as compared to Group B (P = 0.008 and P = 0.009, respectively). Statistically significant differences in median NRS scores were found at the 4th, 5th, and 6th h (P = 0.001, respectively). The mean duration to analgesia request was 238.1 ± 65.5 min in Group A compared to 207.2 ± 49.1 min in Group B (P = 0.034). Conclusion: The addition of 25 µg fentanyl to 2% lidocaine plus adrenaline mixture improved the quality of peribulbar anaesthesia and is recommended in Nigerian adults scheduled for cataract surgery under peribulbar anaesthesia to improve their surgical experience.

Optimum programmed intermittent epidural bolus interval time of ropivacaine 0.0625% with dexmedetomidine 0.4μg/ml at a fixed volume of 10mL: a randomized controlled trial.

The aim of our study was to administer adequate local anesthetic in programmed intermittent epidural bolus (PIEB) to avoid breakthrough pain and decrease the use of manual and PCEA boluses. We, therefore, conducted this study to determine the effective PIEB interval time between boluses of ropivacaine 0.0625% with dexmedetomidine 0.4μg/ml at a fixed volume of 10mL in 90% of subjects (EI90), without the use of patient-controlled epidural analgesia (PCEA). A total of 80 subjects were included in the final statistical analysis from 23 August 2022 to 22 November 2022. The subjects were randomly assigned to one of four different PIEB time intervals: 40, 50, 60, and 70min (groups 40, 50, 60, and 70), respectively. The primary outcome was the effective epidural labor analgesia, defined as no use of PCEA bolus or a manual bolus until the end of the first stage of labor or within 6hours after loading dose administration. The PIEB EI90 (95% CI) between boluses of ropivacaine 0.0625% with dexmedetomidine 0.4μg/ml at a fixed volume of 10mL was estimated using probit regression. The effective PIEB interval time between boluses of ropivacaine 0.0625% with dexmedetomidine 0.4μg/ml at a fixed volume of 10mL in 90% of subjects without the use of PCEA was 45.4 (35.5-50.5) minutes using probit regression. No statistical differences were found in the proportion of subjects with Bromage score > 0, hypotension, pruritus, nausea, and vomiting between groups. However, the highest sensory block (pinprick) in the 40-min group was significantly higher than that in the other groups. The estimated value for EI90 for PIEB between boluses of ropivacaine 0.0625% with dexmedetomidine 0.4μg/ml at a fixed volume of 10mL using probit regression was 45.4 (35.5-50.5) minutes. Furthermore, future studies are warranted to be established to determine the optimal parameters for different regimens in clinical practice.

A comparison of the effects of succinylcholine and rocuronium on recovery time from anesthesia and vital signs in electroconvulsive therapy

Aims: Electroconvulsive therapy (ECT) is based on stimulation of brain tissue with an electrical current and the induction of generalized convulsions. The aim of this study was to compare the use of rocuronium as a muscle relaxant and sugammadex as an antidote during ECT with succinylcholine in terms of its effect on adequate anesthesia, hemodynamics, and recovery. Methods: This study was planned as a single-center prospectively collected and retrospectively analyzed observational cohort study. Patients were divided into two groups as group S (succinylcholine) and group R+S (rocuronium and sugammadex). Patients were premedicated with 0.5 mg of atropine I.M. half an hour before the procedure. Propofol 1mg/kg was administered as an induction agent in both groups, succinylcholine 1mg/kg in Group S, and rocuronium 0.4mg/kg in Group R+S. Sugammadex 2mg/kg was administered as a rocuronium antidote. Vital signs were monitored throughout the procedure with ECG, spo2, and blood pressure monitoring. Results: There was a statistically significant difference between the two groups (Group S and Group R+S) in the time to return for spontaneous respiration (p=0.002). The mean SSS value was 111.78 seconds in Group S and 88.82 seconds in Group R+S. There was a statistically significant difference between the spontaneous eye-opening times between Group S and Group R+S. (p=0.017) The mean SGA value was 211.42 seconds in Group S and 173.12 seconds in Group R+S. There was a statistically significant difference between Group S and Group R+S in the duration of modified Aldrete score 9 (p=0.000&lt;0.05). The mean duration of MAS 9 was 542.60 seconds in Group S and 410.54 seconds in Group R+S. Conclusion: In conclusion, although the high cost of rocuronium sugammadex limits its routine use in ECT anesthesia, it can be used as an ideal alternative agent in cases where succinylcholine is contraindicated or anticholinesterases are not suitable because it shortens the recovery time and the time to return of spontaneous respiration compared to succinylcholine.

Umbilical Hernia Repair under Ultrasound Guided Bilateral Rectus Sheath Block: A Case Series

Usually reserved for high-risk patients, ultrasound guided bilateral rectus sheath block can be a very effective alternative for primary repair of umbilical hernia thereby reducing the morbidity and mortality associated with spinal or general anesthesia and providing adequate anesthesia and analgesia.

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.

Assessing the Efficacy of Buffered Versus Nonbuffered Lidocaine in Dental Extractions: A Double-Blinded Randomized Controlled Trial

Injections using buffered lidocaine may decrease discomfort, have a quicker onset, and be a more efficacious local anesthetic. Previous studies have been inconclusive in the oral context. To address if bicarbonate buffered 2% lidocaine can decrease pain from the use of local anesthesia, has a quicker onset time, and is more efficacious. The design was a single-center double-blinded randomized control trial, set in an outpatient oral and maxillofacial clinic housed in the University of Cincinnati Medical Center. Inclusion criteria for the study were patients requiring a single tooth extraction due either to caries or periodontal disease. The predictor variable was the local anesthetic used either nonbuffered 2% lidocaine with 1:100,000 epinephrine (control) or bicarbonate buffered 2% lidocaine with 1:100,000 epinephrine (study) was randomly assigned. Primary outcome variables were injection pain score, and postoperative pain, time to anesthetic onset, and the number of rounds of injections required to achieve adequate anesthesia. The covariates were jaw involved, age, sex, and race, American Society of Anesthesiologists score, body mass index, current tobacco use, history of psychiatric illness, chronic pain, and preoperative pain score. Test statistics were calculated using Wilcoxon rank-sum test, Kruskal-Wallis test, Spearman rank correlation test, χ2 test for bivariate analyses, and Fisher's exact test. P values≤.05 were considered statistically significant. The final sample was 114 subjects. The mean age of the sample was 42.97years, standard deviation ±13.43years. The sample was 39.47% male. The racial demographics were Caucasian (62.28%) and African American (33.33%). Buffered lidocaine did not have a statistically significant relationship with any of the outcomes. The jaw involved had a statistically significant association to the injection pain score (P value=.006), and the number of rounds of anesthetic required (P value=.047). Age showed a statistically significant association to injection pain score (P value=.032), and the number of rounds of anesthetic required (P value=.027). Finally, preoperative pain had a statistically significant relationship with injection pain score (P value= < .001). In this study, bicarbonate buffered lidocaine did not exhibit any discernible advantages over nonbuffered lidocaine for any study outcomes.