Mg Of Hyperbaric Bupivacaine Research Articles

Effects Of Low Doses Of Intrathecal Clonidine And Dexmedetomidine With Bupivacaine On The Duration Of Sensory And Motor Block In Abdominal And Lower Limb Surgeries- A Prospective Randomised Double Blinded Study

BACKGROUND: The purpose of this study is to compare the duration of sensory and motor block in elective lower limb and abdominal procedures following intrathecal administration of bupivacaine along with adjuvants either clonidine or dexmedetomidine. METHODS: A prospective randomised double blinded study. 120 study participants were randomly allocated to three groups-Group A was given 12.5 mg of hyperbaric bupivacaine, Group B was given 3 mcg dexmedetomidine along with 12.5 mg hyperbaric bupivacaine and Group C was given 30 mcg of clonidine along with hyperbaric bupivacaine. The duration of sensory and motor block was recorded. RESULTS: Group B and C study participants showed significantly longer duration of sensory and motor block when compared to Group A. The mean duration of sensory block in Group A was 92.5 minutes, Group B 124.5 minutes Group C (119.4 minutes) (A vs B, A vs C p<0.001). The mean duration of motor block in group A 149.1 min, group B 252.5 min, Group C 217 min (A vs B, A vs C, B vs C P<0.001) CONCLUSION: By adding 3 mcg dexmedetomidine or 30 mcg clonidine to hyperbaric bupivacaine duration of sensory and motor block was significantly prolonged.

Comparison of sequential and mixture injections of opioids and hyperbaric bupivacaine for subarachnoid block for lower segment caesarean section: a randomised controlled study.

Opioids are commonly added to local anaesthetic for subarachnoid block for caesarean section due to their synergistic effects. The physiochemical characteristics of opioids suggest premixing with hyperbaric bupivacaine may limit their distribution within the CSF. We studied the effect of a separate injection with a combination of bupivacaine, morphine and fentanyl on block characteristics, haemodynamic changes, postoperative pain and patient satisfaction. Following ethical approval and informed consent, a prospective double-blinded randomised controlled trial was performed in a university hospital. A total of 126 patients undergoing caesarean section were randomised to two groups. In group M, the premixed group, patients received 12mg of hyperbaric bupivacaine, 20 mcg of fentanyl and 100 mcg of morphine injected as a single mixture. In group S, the separate injection group, patients received the same drugs in separate injections. Measurements included haemodynamics, block distribution, intra- and postoperative pain, as well as patient satisfaction. Patients in both groups had similar block height, time to maximum sensory block, time to block regression and motor block. However, haemodynamics were different between the groups. The proportion of systolic hypotension episodes was greater in group S [159/1320 (12.05%)] than group M [113/1452 (7.78%)], with P = 0.0002. Moreover, a greater amount of ephedrine was administered in group S than group M, with values 12.09 (8.1) and 9.09 (8.5) mg respectively (P = 0.001). Additionally, postoperative pain, as measured by the Visual Analogue Scale (VAS), was greater in group M, with a VAS of 4.6 (1.7), vs. group S, which recorded a VAS of 3.8 (2.0) (P = 0.017). Sequential injection of intrathecal opioids and hyperbaric bupivacaine resulted in greater early haemodynamic instability and slightly better postoperative analgesia without any difference in block height or patient satisfaction. NCT04403724.

Safety and Efficacy of Ultrasound-Guided Combined Segmental Thoracic Spinal Epidural Anesthesia in Abdominal Surgeries and Laparoscopic Procedures: A Prospective Randomized Clinical Study.

Thoracic segmental spinal anesthesia (SA) may be a good alternative to general anesthesia (GA) for abdominal operations and laparoscopic procedures, especially in high-risk patients. The aim of this study was to investigate the safety and efficacy of thoracic segmental SA vs GA during abdominal operations and laparoscopic procedures. This study was conducted at our university hospital and involved a total of 46 patients who underwent abdominal operations and laparoscopic procedures. The study period spanned from January 15, 2022, to October 15, 2022. Patients were divided into 2 groups: Group 1 (n = 23) received standard GA, and group 2 (n = 23) received thoracic segmental SA. A combination of 10 mg of hyperbaric bupivacaine 0.5% and 25 μg of fentanyl was injected through the spinal needle. The epidural catheter was then threaded through the Tuohy needle after withdrawal of the spinal needle to keep only 4 cm up in the epidural space. Demographic data, both intra and postoperative hemodynamic parameters, were monitored. Postoperatively, pain in both groups was treated with intravenous (IV) morphine by patient controlled analgesia (PCA), PCA settings were 1 mg morphine/mL, no background infusion, bolus dose 2 mL and lockout interval 15 min. Postoperative, both resting VAS and VAS during cough were measured for all patients at fixed intervals, and all patients were followed up for postoperative complications. No significant variation was found in demographic data. Intra and postoperative mean arterial pressure (MAP) and heart rate (HR) measurements were higher in group 1 than in group 2 but without a statistically significant difference (P < 0.029). Early postoperative VAS values and discharge time from the postanesthesia care unit (PACU) were significantly reduced in group 2 than in group 1 (P < 0.001). The number of patients asked for analgesia and total opioid consumption were substantially reduced in group 2 than in group 1. Also, the time of the first analgesia request and patient satisfaction were substantially greater in group 2 than in group 1. Combined thoracic spinal/epidural block results in stable hemodynamics, longer postoperative analgesia with fewer side effects, and greater surgeon and patient satisfaction in patients undergoing abdominal operations and laparoscopic procedures.

Comparative study between ultrasound-guided transversus abdominis plane block and spinal morphine for pain relief after an elective cesarean section

Background Severe acute pain occurs in more than 10% of patients within the first 36 h after a cesarean section and can significantly impact women’s satisfaction. The aim of this study was to compare the transversus abdominis plane (TAP) block for postoperative pain relief following cesarean section operations with the most famous analgesia (intrathecal morphine) used for a cesarean section regarding its efficacy and complications. Patients and methods This interventional double-blinded randomized controlled study was carried out on 60 cases, who underwent an elective cesarean delivery. They were randomized into two groups; patients were divided into two equal groups. Group M received intrathecal 150 μg morphine in a 0.5 ml volume, mixed with 10 mg of hyperbaric bupivacaine 0.5% in a 2 ml volume (total volume 2.5 ml). Group B received intrathecal 10 mg hyperbaric bupivacaine 0.5% 2 ml volume+0.5 saline (total volume 3 ml) and at the end of surgery the patient received bilateral TAP block with a 20 ml volume of 0.25% bupivacaine on each side. Results Postoperative heart rate, respiratory rate, oxygen saturation, mean arterial blood pressure, and intraoperative Bromage score were insignificantly different at all-time measurements between both groups. Visual analog score and postoperative Bromage score at 2, 3, and 4 h were higher in group B than group M (P&lt;0.001). Time of rescue analgesia was significantly prolonged in group M than group B (P&lt;0.001). Total paracetamol and morphine doses were significantly lower in group M than group B (P&lt;0.001). Conclusions TAP block is a good alternative technique to intrathecal morphine in reducing postcesarean section pain, with less postoperative nausea and vomiting and pruritus compared with intrathecal morphine (ITM).

Effects of Hyperbaric and Isobaric Bupivacaine on Hemodynamic Profiles and Block Characteristics Among Parturients Undergoing Elective Cesarean Section Under Spinal Anesthesia: A Randomized Controlled Trial.

Cesarean section (CS) is a surgical procedure where the baby is delivered through incisions made in the abdomen and uterus. Bupivacaine is a widely recognized local anesthetic available in different baricity and it is frequently used for spinal anesthesia. The baricity of bupivacaine impacts hemodynamic profiles and block characteristics. To compare the effects of hyperbaric and isobaric bupivacaine on hemodynamic profiles and block characteristics among parturients undergoing elective cesarean section under spinal anesthesia at Dilla University Referral Hospital. 64 pregnant mothers scheduled for elective cesarean section under spinal anesthesia were randomly assigned to two groups: Group A received a dose of 12.5 mg of isobaric bupivacaine (n = 32), Group B received a dose of 12.5 mg of hyperbaric bupivacaine (n = 32). Prior to conducting the study, the necessary ethical approvals were obtained. For comparing numerical variables between the two groups, the independent Sample t-test or Mann-Whitney U-test was employed as needed. Repeated measurements were analyzed using mixed ANOVA. Categorical variables were assessed using either the chi-square test or Fisher's exact test. Statistical significance was set at P < 0.05, with a power of 90%. The mean Systolic Blood Pressure (SBP), Diastolic Blood pressure (DBP), and Mean Arterial Blood Pressure (MAP) showed significant decrement in the group receiving isobaric spinal anesthesia compared to those receiving hyperbaric bupivacaine. The decrement was observed from the 6th to 30th minute (p<0.05). Furthermore, the hyperbaric group had a faster onset time for achieving the maximum sensory block, with a median time of 3 (1) min compared to 4 (2) mins in the isobaric group (p<0.001). We conclude that hyperbaric bupivacaine provides stable intraoperative hemodynamic parameters and an earlier onset of block than isobaric bupivacaine. Therefore, we recommend clinicians to use hyperbaric bupivacaine for cesarean delivery.

A comparison of intrathecal clonidine and buprenorphine as spinal anesthesia adjuvant for abdominal and lower limb surgeries

Background: Many intrathecal adjuvants are being used with local anesthetics to prolong the intraoperative anesthesia and postoperative analgesia. Clonidine and buprenorphine are known to potentiate the effects of local anesthestics. Aims and Objectives: This study was designed to compare the duration of postoperative analgesia as well as duration of sensory and motor block onset, intraoperative hemodynamic changes, and perioperative complications between buprenorphine and clonidine when used as an adjuvant to intrathecal hyperbaric bupivacaine. Materials and Methods: A randomized double-blind study for 80 patients undergoing lower abdominal surgeries and lower limb surgeries was designed with Group B receiving 50 mcg of buprenorphine and Group C receiving 50 mcg of clonidine with 15 mg of hyperbaric bupivacaine 0.5%. Student’s t-test and Chi-square were used for comparing the data. Results: The time of onset of duration of post-operative analgesia as well as sensory and motor block was significantly higher in buprenorphine group as compared to clonidine group. In present study, incidence of bradycardia as well as hypotension was significantly higher in group C as compared to group B (P&lt;0.05). Conclusion: Addition of intrathecal buprenorphine and clonidine potentiates the duration of analgesia, sensory and motor block, with buprenorphine has a longer analgesic effect when compared to clonidine.

Comparative study on analgesia duration with bupivacaine-buprenorphine combination vs. bupivacaine alone for cesarean delivery

BACKGROUND: Spinal anesthesia has been the preferred type of anesthesia for cesarean sections and other obstetric operations. Bupivacaine has been used for this purpose being long acting. Lately various narcotic analgesics have been added to prolong the analgesia and reduce the expected toxicity of bupivacaine alone. We evaluated the duration of analgesia achieved with the combination of bupivacaine-buprenorphine versus bupivacaine alone in cesarean delivery under spinal anesthesia.&#x0D; Methods: A comparative study was conducted at a tertiary care teaching healthcare center in Karachi, Pakistan. One hundred patients scheduled for elective cesarean section were enrolled and divided into two groups. Group A received 10 mg of hyperbaric bupivacaine 0.5% along with normal saline, while Group B received the same dose of bupivacaine along with buprenorphine 75 µg. Preoperative assessment, intraoperative procedures, and postoperative management were performed following standard protocols of our institution. Statistical analysis was conducted using independent t-tests and chi-square tests.&#x0D; Results: The findings revealed significantly longer mean time to request for analgesia in Group B compared to Group A (825.33 min vs. 166.78 min; P = 0.182), Only 14 patients in Group B (28%) required analgesia within 24 h, while all patients in Group A requested analgesia within that time frame (P = 0.0001). Moreover, an insignificantly lower incidence of hypotension and reduced need for phenylephrine administration was observed in Group B compared to Group A (P = 0.585). Group B also demonstrated a lower incidence of nausea (P = 0.380) and vomiting (P = 0.370) compared to Group A, but the difference was statistically not significant.&#x0D; Conclusion: This study suggests that the addition of buprenorphine to bupivacaine in spinal anesthesia for cesarean delivery provides prolonged analgesia, reduces the incidence of nausea and vomiting, and decreases the need for vasopressor administration. These findings support the potential benefits of using the bupivacaine-buprenorphine combination in cesarean deliveries.&#x0D; Key words: Cesarean Delivery; Opioids, Intrathecal; Anesthesia, Spinal; Bupivacaine; Buprenorphine; Analgesia, Duration&#x0D; Citation: Saleh M, Malik S, Memon GN, Rehman M. Comparative study on analgesia duration with bupivacaine-buprenorphine combination vs. bupivacaine alone for cesarean delivery. Anaesth. pain intensive care 2023;27(5):501−505; DOI: 10.35975/apic.v27i5.2303&#x0D; Received: July 29, 2023; Reviewed: August 10, 2023; Accepted: August 10, 2023

Comparison of the Dexmedetomidine and Sufentanil Added to Spinal Anesthesia with Bupivacaine for Hemodynamic Stability and Postoperative Analgesia in Elective Cesarean Section Surgery: A Single-Blinded Randomized Clinical Trial

Background: Hemodynamic instability, including hypotension and bradycardia, can occur due to spinal anesthesia by bupivacaine. However, it is possible to reduce the chance of hemodynamic changes by the reduction of the dose of bupivacaine and/or the addition of adjunctive agents. Objective: This study aimed to compare the effects of the addition of intrathecal dexmedetomidine and sufentanil to spinal anesthesia with bupivacaine in elective cesarean section (CS). Methods: This prospective single-blinded randomized clinical trial with parallel groups was performed on 60 pregnant women who were candidates for elective CS in Imam Reza Hospital in Kermanshah, Iran. In addition to receiving 10 mg of hyperbaric bupivacaine 0.5%, they were randomly divided into two groups to receive intrathecal sufentanil 5 μg (30 cases) or dexmedetomidine 5 μg (30 cases). Changes in blood pressure, heart rate, and occurrence of side effects (e.g., nausea, vomiting, headache, and shivering) were recorded within 1 h after the injections. Moreover, the postoperative analgesia rate and duration (using a visual analog scale [VAS]) were recorded within the first 24 h after the completion of the CS. Headache severity (using a VAS) was also measured during the first week after CS. Results: Patients declared their satisfaction with analgesia after surgery. No significant difference was found between the two groups in terms of heart rate and systolic and diastolic blood pressure changes during the first 60 min. Similarly, no significant difference was observed between the two groups in terms of the severity of incision pain in the first 24 h after CS surgery. On days 3, 4, and 5, none of the patients in the sufentanil and bupivacaine group had headaches (VAS=0), but patients in the dexmedetomidine and bupivacaine group had some degree of headache (P=0.040). Conclusions: Based on the results, intrathecal administration of bupivacaine with either sufentanil or dexmedetomidine in CS did not have significantly different effects, except for slightly more severe headaches in the dexmedetomidine group. Therefore, no superiority of one drug over the other was observed for intrathecal administration with bupivacaine in CS.

ANAESTHETIC MANAGEMENT OF A 26 YEARS OLD PREGNANT WOMEN WITH A KNOWN CASE OF SICKLE CELL DISEASE PLANNED FOR EMERGENCY CESAREAN SECTION

A26 years old pregnant women who is a known case sickle cell disease (ss) presented with respiratory distress and severe anemia planned for emergency cesarean section . After preoperative optimisation with 4 units of blood transfusion and oxygenation via facemask operative intervention was carried out under combine spinal epidural anaesthesia . A sensory block level of T6 is achieved with intrathecal injection 10 mg of hyperbaric bupivacaine with 25 microgram of injection fentanyl .Intraoperatively 1 units of blood transfusion was done under regular ABG monitoring to prevent acid -base inbalance, hypoxia, acidosis , hypothermia and hypercarbia . Postoperative analgesia was provided through the epidural catheter with 6 ml of ( inj 0.125% of bupivacaine + 25 microgram of inj fentanyl) every 12 hourly for 3 days. She was discharged from the postnatal ward on 5 th day following surgery with a healthy male baby . Pregnancy associated with sickle cell disease carries a high risk of maternal and neonatal mortality and morbidity. It provide a great challenge to anaesthesiologist during perioperative management. The uneventful course of anaesthesia in this case is managed with systemic evaluation and careful anaesthetic strategy

Comparison between 10 and 12 mg doses of intrathecal hyperbaric (0.5%) bupivacaine on sensory block level after first spinal failure in cesarean section: A double-blind, randomized clinical trial.

BackgroundReducing adverse effects during cesarean delivery and improving the quality of sensory blocks with appropriate doses of intrathecal hyperbaric bupivacaine can play an important role in the safe management of cesarean delivery. The aim of this study was to compare the doses of 10 and 12 mg of intrathecal hyperbaric bupivacaine 0.5% on sensory block level after first spinal failure in cesarean section (CS).MethodsIn this double-blind, randomized clinical trial, 40 candidates of CS after first spinal failure with class I-II based on American Society of Anesthesiologists (ASA) were randomly assigned into two equal groups (n = 20). Group A and B received the spinal anesthesia with 10 mg and 12 mg of hyperbaric bupivacaine (0.5%), respectively. Maximum levels of sensory block, motor block quality, and vital signs were measured in two groups by 60 min after SPA. Incidence of SPA complications during surgery were also recorded. Data were analyzed by SPSS ver.21 software using repeated measures analysis of variance at 95% confidence interval (CI) level.ResultsExcellent quality of sensory blocks and complete quality of motor blocks were achieved in all participants (100%). However, the mean time to onset of anesthesia (4.47 ± 0.69 vs. 3.38 ± 0.47, P < 0.001) and time to reach T10 level (60.73 ± 11.92 vs. 79.00 ± 19.21, P < 0.001) in the Group A, were significantly shorter than in the patients of Group B. The incidence of hypotension (P = 0.001), nausea/vomiting (P = 0.007) and bradycardia (P = 0.012) as well as administration of ephedrine and atropine were significantly higher in Group B compared to Group A.ConclusionSpinal anesthesia can be safely repeated with a 10 mg of hyperbaric bupivacaine 0.5% in a caesarean section after the initial spinal failure.Clinical trial registration[https://en.irct.ir/trial/40714], identifier [IRCT20120915010841N20].

Comparative study between intrathecal bupivacaine versus intrathecal bupivacaine and fentanyl in elective caesarean sections

Background: Intrathecal administration of adjuvant drugs have been used increasingly for increasing the onset, duration and quality of analgesia. This study was designed to compare the efficacy of intrathecal hyperbaric bupivacaine with that of intrathecal hyperbaric bupivacaine with fentanyl for patients undergoing elective caesarean sections. Materials &amp; methods: 50 aged between 15 to 30 years, whose weight is 45 to 80 kg, belonging to ASA class I and II, scheduled for elective caesarean sections were selected and randomized into 2 groups. Group B received 9mg of hyperbaric bupivacaine 0.5% and group BF received 9mg of hyperbaric bupivacaine 0.5% with 10mcg of fentanyl. The onset of analgesia, onset of motor blockade, the duration of sensory blockade, the duration motor blockade, the quality of blockade, duration of analgesia, Intrathecal Injection to delivery time, APGAR SCORE of neonates, hemodynamic parameters of parturient and side effects were recorded. Results: There was significant difference between the two groups in the meantime to onset of sensory anaesthesia (group BF 3.28±0.73mins, group B 3.84±1.06mins; p value=0.009). The onset of motor blockade was similar in both the groups. Excellent block was achieved in 80% patients in group B compared to 100% of patients in group BF.

A comparative study of intrathecal dexmedetomedine and magnesium sulfate as adjuvants to bupivacaine in total hip replacement

Background & Objectives: Spinal anaesthesia is a popular technique for providing anaesthesia for total hip replacement (THR). Intrathecal adjuvant is given along with local anaesthesia to prolong duration of block. Intrathecal administration of dexmedetomidine and magnesium sulphate is known to enhance duration of block without causing significant side effect. The purpose of this study was to assess the impact of intrathecal dexmedetomidine and magnesium sulfate on the onset and duration of spinal anaesthesia using bupivacaine. Methods: After IEC approval, a prospective, randomized, double blinded study was conducted on 120 ASA I and II adult patients undergoing THR under spinal anaesthesia. Patients were randomly divided into three groups: Group D received 0.1 ml (10 μg) Dexmedetomidine, Group M received 0.1 ml (50 mg) Magnesium sulfate and Group C received 0.1 ml normal saline as control. All the patients in this study received 15 mg of hyperbaric bupivacaine. Time for sensory onset, Time for motor onset, Duration of Sensory Block, Duration of Motor Block, Duration of Analgesia and Incidence of Side Effects were recorded.Results: The haemodynamic parameters like systolic blood pressure, diastolic blood pressure and mean heart rate for the groups were comparable. The onset of sensory and motor block were significantly the fastest for Group D (p< 0.0001). The duration of sensory and motor block were significantly longer for Group D as compared to both the groups (p< 0.0001). The duration of analgesia was significantly prolonged for Group D as compared to both groups (p< 0.0001).Conclusion: Dexmedetomidine added to spinal Bupivacaine shortens the time of recovery and motor onset. It prolongs the duration of both sensory and motor blockade. It also provides significant post-operative analgesia.

Comparison of the Hemodynamic Changes in Normotensive and Severe Preeclamptic Pregnant Woman Posted For Cesarean Section under Spinal Anaesthesia

Background: Spinal anesthesia is widely considered a technique of choice for cesarean delivery. But due to fear of sudden and extensive sympathetic blockade, spinal anesthesia may not be considered safe in severe preeclampsia. Objectives: The aim of the present study was to compare the heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), incidence of hypotension, phenyl ephrine requirement and neonatal outcome between normotensive and severe pre-eclamptic women undergoing cesarean section under spinal anesthesia. Material and Methods: A total of 35 severe pre-eclamptic (BP &gt; 160/110 mmHg) 3(Group A) and 35 healthy parturients (group B), meeting the inclusion criteria were included in the study. After preloading with 10 ml/kg of ringer lactate (RL) solution spinal anesthesia was administered with 12.5 mg of hyper baric bupivacaine. Heart rate and blood pressure were recorded before spinal anesthesia and thereafter at 3 minute intervals upto 60 minutes. Hypotension was defined as MAP LESS,THAN 30% of the baseline or a decrease in SBP to LESS THAN 100 mm Hg over the same time interval and was treated with 50 mcg phenylephrine intravenously (i.v). Apgar score was noted 1 and 5 min after birth. Results: The incidence rate of hypotension among the preeclamptic patients was lower than that of the healthy parturients (55.6% vs. 34.1%). The minimum SBP, DBP, and MAP recorded were lower in normotensive, and the difference between two groups was statistically significant. The mean phenylephrine requirement in the normotensive group (151.1 ± 70) was significantly greater (P LESS THAN 0.0001) than that of pre-eclamptic group (48.3 ± 35). The total doses of IV Phenylephrine for treating hypotension were significantly lower among the preeclamptic patients (72 mcg in preeclamptic patients versus 188 mcg in normotensive patients) (P LESS THAN 0.05). There was no statistical difference in the neonatal outcome and Apgar score in the study groups. Conclusion: Pre-eclamptics experienced less hypotension following subarachnoid block (SAB) than normotensives and required less phenylephrine with comparable fetal Apgar scores.

Comparison of the Hemodynamic Changes in Normotensive and Severe Preeclamptic Pregnant Woman Posted For Cesarean Section under Spinal Anaesthesia

Background: Spinal anesthesia is widely considered a technique of choice for cesarean delivery. But due to fear of sudden and extensive sympathetic blockade, spinal anesthesia may not be considered safe in severe preeclampsia. Objectives: The aim of the present study was to compare the heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), incidence of hypotension, phenyl ephrine requirement and neonatal outcome between normotensive and severe pre-eclamptic women undergoing cesarean section under spinal anesthesia. Material and Methods: A total of 35 severe pre-eclamptic (BP &gt; 160/110 mmHg) 3(Group A) and 35 healthy parturients (group B), meeting the inclusion criteria were included in the study. After preloading with 10 ml/kg of ringer lactate (RL) solution spinal anesthesia was administered with 12.5 mg of hyper baric bupivacaine. Heart rate and blood pressure were recorded before spinal anesthesia and thereafter at 3 minute intervals upto 60 minutes. Hypotension was defined as MAP LESS,THAN 30% of the baseline or a decrease in SBP to LESS THAN 100 mm Hg over the same time interval and was treated with 50 mcg phenylephrine intravenously (i.v). Apgar score was noted 1 and 5 min after birth. Results: The incidence rate of hypotension among the preeclamptic patients was lower than that of the healthy parturients (55.6% vs. 34.1%). The minimum SBP, DBP, and MAP recorded were lower in normotensive, and the difference between two groups was statistically significant. The mean phenylephrine requirement in the normotensive group (151.1 ± 70) was significantly greater (P LESS THAN 0.0001) than that of pre-eclamptic group (48.3 ± 35). The total doses of IV Phenylephrine for treating hypotension were significantly lower among the preeclamptic patients (72 mcg in preeclamptic patients versus 188 mcg in normotensive patients) (P LESS THAN 0.05). There was no statistical difference in the neonatal outcome and Apgar score in the study groups. Conclusion: Pre-eclamptics experienced less hypotension following subarachnoid block (SAB) than normotensives and required less phenylephrine with comparable fetal Apgar scores.

Comparison of nalbuphine versus fentanyl as intrathecal adjuvant to bupivacaine for orthopedic surgeries: A randomized controlled double-blind trial.

Background and Aims:Intrathecal adjuvants are used with local anesthetics to prolong the duration and provide postoperative pain relief while minimizing the dose of local anesthetic. Nalbuphine is an agonist-antagonist opioid and provides prolonged duration of analgesia with fewer side effects of fentanyl such as pruritus, nausea, and vomiting. The aim of this study was to evaluate and compare the onset and duration of sensory and motor blockade, hemodynamic effects, duration of postoperative analgesia, and adverse effects of nalbuphine and fentanyl given intrathecally with hyperbaric 0.5% bupivacaine in orthopedic lower limb surgeries.Material and Methods:Sixty six patients classified in American Society of Anesthesiology (ASA) classes I and II scheduled for orthopedic lower limb surgeries were enrolled. Patients were randomly allocated to receive 15 mg of hyperbaric bupivacaine with either 1 mg nalbuphine (group N), 25 μg fentanyl (group F) or 0.9% normal saline (group C) intrathecally.Results:Patients who received intrathecal nalbuphine (group N) had a significantly delayed onset of sensory and motor block as compared to patients who received fentanyl (group F). The time to two segment regression was significantly prolonged in group F (122.05 ± 10.65 minutes) as compared to group N (114.55 ± 10.90 minutes) [P < 0.05]. The mean duration of motor blockade was significantly prolonged in group F (197.73 ± 15.09 minutes) as compared to group N (180.68 ± 15.68 minutes) [P < 0.05]. Duration of spinal analgesia was comparable in group N (323.18 ± 57.39 minutes) and group F (287.05 ± 78.87 minutes), both significantly more than group C (224.32 ± 42.54 minutes). Hemodynamic effects, 24-h rescue analgesic requirements, and incidence of side effects were comparable among group N and F.Conclusion:Intrathecal nalbuphine in a dose of 1 mg is an equally useful alternative to fentanyl in a dose 25 μg when used as an intrathecal adjuvant to bupivacaine for lower limb surgeries. The prolonged duration of analgesia and no adverse effects makes it a good choice for the orthopedic procedures of lower limb.

Односторонняя субарахноидальная блокада для интраоперационного обезболивания пластики пахового канала

Основной группе (n = 20; 39,4 ± 4,1 года; 71,4 ± 4,3 кг, I–II по ASA) была проведена односторонняя субарахноидальная блокада (ОСБ) 10 мг гипербарического бупивакаина в сочетании с 0,06 мг бупренорфина при пластике пахового канала. Контрольной группе (n = 20; 42,6 ± 0,9 года; 75,4 ± 3,6 кг, I–II по ASA) выполнили двустороннюю субарахноидальную блокаду (ДСБ) 15 мг изобарического бупивакаина в сочетании с 0,06 мг бупренорфина при аналогичной операции. ОСБ и ДСБ обеспечивали эффективное обезболивание операций с длительной послеоперационной аналгезией. При ОСБ гемодинамика была стабильной за счет одностороннего, а не двустороннего симпатического блока в отличие от ДСБ. Улучшение качества аналгезии позволяло проводить ранние активизацию и энтеральное питание пациентов, а также сокращало период реабилитации. Субарахноидальное применение бупивакаина с добавлением бупренорфина характеризовалось значительно меньшим количеством негативных побочных эффектов по сравнению с соответствующим введением других опиоидов.

Comparison of hemodynamic effect between the spinal anesthesia and saddle block during transurethral resection of the prostate

Background: The best technique for transurethral resection of prostate (TURP) is regional anesthesia. The hypotension is the major complication following spinal anesthesia. The hemodynamic changes is less with saddle block than spinal block. Aim and Objective: To compare hemodynamic effect between the spinal block and saddle block in TURP. Patients and methods: 50 patients between 50-70 years old ASA I – II prepared for TURP, divided randomly in two groups 25 pt. in each group. Group A received spinal 10 mg of hyperbaric bupivacaine (2 ml of 0.5%), were group B received saddle block 10 mg of hyperbaric bupivacaine (2 ml of 0.5%). The blood pressure, oxygen saturation, heart rate measured and recorded subsequently. The hypotension treated by 100 mcg bolus of phenylephrine. Results: In our study there was statically significant difference (p &lt; 0.05) between group A which received spinal anesthesia and group B which received saddle block in hemodynamic effect. In which the incidence of hypotension and vasopressor requirement more in group A. Conclusion: Under saddle block the TURP can safely performed with low risk of hypotension and less requirement of vasopressor.

Spinal anesthesia for elective cesarean section. Bupivacaine associated with different doses of fentanyl: randomized clinical trial

ObjectiveAssess patients submitted to elective cesarean section under spinal anesthesia, and the efficacy of different doses of fentanyl associated with bupivacaine. MethodsThe study included 124 pregnant women randomly distributed into 4 groups (n = 31) according to different doses of fentanyl (15 μg, 10 μg, 7.5 μg), Groups I, II, and III, respectively, and control group IV, associated with 0.5% hyperbaric bupivacaine (10 mg). An epidural catheter was inserted in case epidural top-up was required. We assessed the anesthetic blockage characteristics, negative maternal and neonatal outcomes, and maternal side effects. Statistical analysis was performed using Kruskal-Wallis, Fisher’s exact and chi-square tests. The level of significance was 5% (p < 0.05). ResultsThe quality of analgesia, time for the first complaint of pain and motor block recovery time were significantly better for groups that received fentanyl in comparison to controls (p < 0.001). None of the groups had negative maternal-fetal outcomes. Nausea was significantly more frequent in patients in Groups II (10 µg) and III (7.5 µg) when compared to Groups I (15 µg) and IV (no fentanyl). Vomiting was more frequent in Group III than in Group I (p = 0.006). The incidence of pruritus was significantly higher in the groups receiving fentanyl (p = 0.012). ConclusionsAmong the solutions studied, the spinal anesthesia technique using 15 µg of fentanyl associated with 10 mg of hyperbaric bupivacaine provided satisfactory analgesia and very low incidence of adverse effects for patients submitted to cesarean section. Trial Registration NumberUTN U1111-1199-0285. REBECRBR-5XWT6T.

A Randomized Double-Blinded Dose-dependent Study of Metaraminol for Preventing Spinal-Induced Hypotension in Caesarean Delivery.

Purpose: Prophylactic infusion of a vasopressor is preferred as a rational choice in clinical practice in Cesarean delivery. Metaraminol is one of most common vasopressors used in obstetric clinical practice. However, the dose-response of metaraminol has not been fully determined and the optimal infusion dose is unknown. Therefore, this study aimed to determine the median effective dose (ED50) and 90% effective dose (ED90) of weight-based fixed-rate metaraminol infusions for preventing spinal-anesthesia-induced hypotension in patients having combined spinal-epidural anesthesia for elective Caesarean delivery. Methods: One hundred and seventeen patients with singleton pregnancies were enrolled and randomly allocated into one of five groups in this study. Patients received prophylactic metaraminol infusion at a fixed rate of 0, 0.25, 1.0, 1.75 or 2.5 μg/kg/min in each group immediately after induction with intrathecal 10 mg of hyperbaric bupivacaine mixed with 5 μg of sufentanil. An effective prophylactic dose was defined as no occurrence of hypotension during the period of spinal introduction and neonatal delivery. Values for ED50 and ED90 of prophylactic infusion of metaraminol were calculated using probit regression. Characteristics of spinal anesthesia and side effects were recorded. Results: The ED50 and ED90 values of weight-based fixed rate of metaraminol infusion were 0.64 (95% CI, 0.04–1.00) μg/kg/min and 2.00 (95% CI, 1.58–2.95) μg/kg/min respectively. The incidence of hypotension decreased with an increased infusion rate of metaraminol in the five groups (test for trend, p < 0.001). The incidence of hypotension was similar between group 0 and 0.25, but significant higher than other groups; the incidence of hypotension was also similar between group 1.0 and 1.75, but higher than group 2.5. The incidence of reactive hypertension was significantly higher in group 2.5 compared to the other groups. Physician interventions were more frequent in group 0, 0.25 and 2.5 than in group 1.0 and 1.75 (adjusted p < 0.001). No difference was found in neonatal outcomes, including Apgar score and pH value of the umbilical artery. Conclusion: In summary, we have compared four different prophylactic weight-based infusion doses of metaraminol for preventing post-spinal hypotension in Cesarean delivery. The ED50 and ED90 values of metaraminol infusion for preventing spinal anesthesia-induced hypotension were 0.64 μg/kg/min and 2.00 μg/kg/min, respectively. This finding may be helpful for guiding clinical practice and further research.

Comparative Study between Analgesic Effects of Intrathecal Administration of Midazolam Versus Tramadol with Bupivacaine for Infra-Umbilical Surgeries

Background: The administration of bupivacaine intrathecally as a regional anesthesia is commonly used to provide anesthesia for lower abdominal surgeries. The motor blockage of bupivacaine provides adequate blockage, which allows the surgeons to do their work comfortably and also provides effective postoperative analgesia in early postoperative period. However, adding adjuvants to the local anesthetics to prolong the period of postoperative analgesia after fading of the spinal anesthesia was tried in many studies. These supplements as regard to postoperative pain relief are beneficial as they decrease or abolish the need for the administration of analgesics and their associated complications. Objective: To compare the analgesic effect of intrathecal midazolam versus intrathecal tramadol when added to bupivacaine during spinal anesthesia after infra-umbilical surgeries. Patients and methods: In our study we included 80 patients scheduled for elective surgeries in the lower abdomen and lower limbs (infra-umbilical surgeries) under spinal anesthesia. They were randomly divided to one of two groups. Group M received 10 mg of hyperbaric bupivacaine + 2 mg midazolam, and group T received 10 mg of bupivacaine + 20 mg of tramadol (total is 3cc in both groups). The comparison was done by using the visual analogue scale (VAS) for assessing postoperative pain score and recording the duration of postoperative analgesia. Results: The postoperative analgesia duration was significantly higher in the tramadol group than midazolam group (P<0.05). Conclusion: Addition of 20 mg tramadol to bupivacaine during spinal anesthesia provides longer duration of analgesia when compared to intrathecal midazolam 2.0 mg.