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BACKGROUND AND AIM: The sonographic assessment of airway in the preoperative period has encouraging results in predicting difficult laryngoscopy. MATERIALS AND METHODS: The prospective, observational study was conducted on 120 patients scheduled for elective surgery requiring general anesthesia and tracheal intubation. The depth of the pre-epiglottic space (Pre-E), the distance from the epiglottis to the midpoint of the distance between the vocal cords (E-VC) was measured sonographically. Similarly, hyomental distance ratio (HMDR) was sonographically measured with head in neutral and extended positions. The primary outcome was the efficacy of Pre E/E-VC, HMDR for predicting difficult laryngoscopy (Cormack-Lehane [CL] Grade 3, 4). The secondary outcome was to correlate these parameters to CL grading. RESULTS: Difficult intubation was observed in 12.5% of patients. The mean ± standard deviation (SD) of Pre E/E-VC ratio was 1.33±0.335, 1.62±0.264 and 1.87±.243, 2.22±.29 for CL Grade 1, 2, 3, and 4, respectively (P = 0.00). The mean ± SD of HMDR was 1.11±.35, 1.12±.29, and 1.07±.39, 1.04 ± 0.01 for CL Grade 1, 2, 3, and 4, respectively (P = 0.00). Pre E/E-VC ratio of more than 1.77 cm had 82% sensitivity, specificity 80%, whereas HMDR less than1.085 had sensitivity 75% and specificity 85.3%, in predicting difficult laryngoscopy (P = 0.00). CONCLUSION: The sonographic measurement of the Pre E/E-VC ratio is a better predictor of CL grading as compared to HMDR. The noninvasive prediction of CL grading can be precisely done by Pre-E/E-VC ratio (range: 0-1.425 corresponds to CL Grade 1; 1.425-1.77 ≈ CL Grade 2; 1.77-1.865 ≈ CL Grade 3, more than 1.865 corresponds to CL Grade 4).
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BACKGROUND AND AIM: Magnesium sulphate (MgSO4) has been used as an adjuvant in brachial plexus block with encouraging results; however, there is no consensus regarding its optimal dose. Thereby, we compared the efficacy of two doses of MgSO4 as an adjuvant in ultrasound (USG) guided supraclavicular brachial plexus block. METHODS: Ninety patients, aged 20-60 years, belonging to American Society of Anesthesiologists physical status 1 or 2, were given USG-guided supraclavicular block. Group B (n = 30) received 20 ml of 0.5%bupivacaine + 5 ml normal saline (NS), Group BM0.5(n = 30) received 20 ml of 0.5%bupivacaine + 3.75 ml NS and 125 mg MgSO4 (1.25 ml) and Group BM1(n = 30) received 20 ml of 0.5%bupivacaine + 2.5 ml NS and 250 mg MgSO4 (2.5 ml). The primary outcome of study was the duration of post-operative analgesia. The normally distributed data were analysed using analysis of variance and categorical data analysed using Chi-square test. RESULTS: Duration of post-operative analgesia was prolonged in Groups BM1 and BM0.5 (665.13 ± 97.874, 475.10 ± 53.294) min respectively as compared to Group B (272.03 ± 40.404 min: P = 0.00). The onset times of sensory and motor block were shorter in Group BM1 (5.17 ± 2.2 min) as compared to Groups BM0.5 and B (8.9 ± 2.3 and 17.7 ± 5.1 min: P = 0.00) respectively. Sensory and motor block durations were prolonged in Group BM1 as compared to BM0.5 and B (P = 0.00). CONCLUSIONS: MgSO4 as adjuvant in brachial plexus block increases the duration of post-operative analgesia. MgSO4 in the dose of 250mg has greater efficacy as compared to 125 mg.
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BACKGROUND AND AIMS: The advent of ultrasonographic-guided techniques has led to increased interest in femoro-sciatic nerve block (FSNB) for lower limb surgeries. α2-agonists have been used recently as adjuvants to local anaesthetics in nerve blocks. We aimed to compare equal doses of clonidine or dexmedetomidine as an adjuvant to levobupivacaine in FSNB for post-operative analgesia. METHODS: Ninety patients scheduled to undergo below knee orthopaedic surgeries under subarachnoid block were divided into three groups: Group LL (n = 30) patients received 38 mL of 0.125% levobupivacaine with 2 mL normal saline, Group LD (n = 30) patients received 38 mL of 0.125% levobupivacaine with 0.5 µg/kg dexmedetomidine and Group LC (n = 30) received 38 mL of 0.125% levobupivacaine with 0.5 µg/kg clonidine in saline to make total drug volume of 40 mL. The primary and secondary outcome variables were duration of analgesia and rescue analgesic requirement, verbal rating score respectively. Continuous variables were analysed with analysis of variance or the Kruskal-Wallis test on the basis of data distribution. Categorical variables were analysed with the contingency table analysis and the Fisher's exact test. RESULTS: Duration of analgesia was prolonged with dexmedetomidine (10.17 ± 2.40 h) and clonidine (7.31 ± 1.76 h) as compared to control (4.16 ± 1.04 h, P = 0.00). Significantly lower pain scores were observed in dexmedetomidine group as compared to clonidine up to 8 h post-operatively. CONCLUSION: Equal doses of clonidine or dexmedetomidine added to levobupivacaine prolonged the duration of analgesia, decreased requirement of rescue analgesia. Dexmedetomidine delays the requirement of rescue analgesics with better pain scores as compared to clonidine.
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BACKGROUND AND AIMS: Transversus abdominis plane (TAP) block has proven to be an effective component of multimodal analgesic regimens for a variety of abdominal procedures. Magnesium sulphate (MgSO4) N-methyl-D-aspartate receptor antagonist has the potential to be an ideal adjuvant in TAP block. We studied the efficacy of MgSO4 as an adjuvant to bupivacaine in TAP block in patients scheduled for total abdominal hysterectomy (TAH) under subarachnoid block (SAB). METHODS: Sixty-five women belonging to American Society of Anesthesiologists physical status 1 or 2, aged between 35 and 70 years, scheduled for TAH under SAB were recruited. Patients in Group B (n = 32) received 18 mL 0.25% bupivacaine (45 mg) with 2 mL normal saline (NS), whereas those in Group BM (n = 33) received 18 mL 0.25% bupivacaine (45 mg) with 1.5 mL (150 mg) MgSO4 and 0.5 mL NS in the ultrasound (USG)-guided TAP block performed on each side after the completion of the surgery under SAB. They were evaluated for pain at 0, 2, 4, 6, 12 and 24 h, time to first rescue analgesic and duration of postoperative analgesia were noted. RESULTS: The post-operative visual analogue scale (VAS) scores were lower in Group BM at 4, 6 and 12 h (P < 0.05). Mean duration of analgesia was significantly prolonged in Group BM with lesser requirement of rescue analgesic (P < 0.05) up to 12 h. CONCLUSION: MgSO4 (150 mg) as an adjuvant to bupivacaine in USG-guided TAP block reduces post-operative pain scores, prolongs the duration of analgesia and decreases demands for rescue analgesics.
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BACKGROUND AND AIMS: The study was designed to compare the effects of tramadol administered as an adjunct to bupivacaine in supraclavicular block to that of systemic administration, on postoperative analgesia and rescue analgesic requirement following upper limb surgeries. MATERIAL AND METHODS: A prospective, randomized, controlled, double-blind study was undertaken in patients scheduled for upper limb surgeries under supraclavicular block. All the three group patients received either of the following drugs mixtures: Group A - bupivacaine 0.5%-18 ml + normal saline-7 ml for block and normal saline-10 ml intravenously. Group B - bupivacaine 0.5%-18 ml + normal saline-7 ml mixture for block and tramadol (100 mg) diluted to 10 ml - intravenously. Group C - bupivacaine 0.5%-18 ml + tramadol (100 mg) + normal saline-5 ml mixture and normal saline 10 ml intravenously. The patients were observed for sensory, motor onset along with the duration of sensory and motor block. Patients were monitored for sedation and hemodynamic parameters during intra-operative and postoperative period. Pain-free period and demand for rescue analgesia was noted in all the patients. RESULTS: The study demonstrates that the mixture of tramadol and bupivacaine injected perineurally for supraclavicular brachial plexus block hastens the onset of sensory block, motor block and provides a longer duration of motor blockade and demand for rescue analgesia as compared to other two groups. CONCLUSIONS: In conclusion, the addition of tramadol to bupivacaine mixtures as an adjunct for supraclavicular brachial plexus block provide better postoperative analgesia for orthopedic upper extremity surgery in comparison to control or systemic tramadol group without any side effects.