Aim: To study the features of local anesthetic solution spreading during sciatic nerve block in dependence on the anesthetic solution volume. Material and Methods: One hundred and sixty nine cases of sciatic nerve blo...Aim: To study the features of local anesthetic solution spreading during sciatic nerve block in dependence on the anesthetic solution volume. Material and Methods: One hundred and sixty nine cases of sciatic nerve blocks done under ultrasonic visualization control were analyzed. Sciatic nerve blocks were performed by lidocaine in volumes 30;25;20;15;12.5;10;7.5;6.5;5;4.5 ml. The cross-section area, equal to local anesthetic spreading, was determined;the extension of the anesthetic solution spreading along sciatic nerve was calculated. Results: The anesthetic agent solution spreads along sciatic nerve in proximal and distal direction, forming a kind of cylinder. The minimum volume of the local anesthetic, which covers sciatic nerve in the whole, is 5 ml. A rare (1.77%) variation of sciatic nerve structure was described, in which tibial and common peroneal nerves develop directly from the branches of sacral plexus. Conclusion: The decrease of the local anesthetic volume leads to reduction of its spreading distance and cross-section area. Ultrasonic visualization can provide for sciatic nerve anatomical peculiarities, which can have an effect on the block quality.展开更多
We report a patient with severe pulmonary arterial hypertension (PAH) undergoing tibio-talo-calcaneal fusion due to Charcot joint. Despite the advancement in the management of PAH, the risks of anesthesia, surgery, an...We report a patient with severe pulmonary arterial hypertension (PAH) undergoing tibio-talo-calcaneal fusion due to Charcot joint. Despite the advancement in the management of PAH, the risks of anesthesia, surgery, and postoperative morbidity and mortality still remain high. A 46-year-old female was presented with severe PAH and end stage renal disease requiring hemodialysis three times a week. Ultrasound-guided sciatic, femoral, and obturator nerve blocks were performed with 0.5% levobupivacaine 15 ml, 10 ml, and 5 ml, respectively. All the blocks were successful, and the patient underwent uneventful anesthesia and surgery. In addition, the postoperative pain control lasted for 15 h and the patient was discharged on POD 5 without any complications. Therefore, ultrasound-guided sciatic, femoral, and obturator nerve blocks are valuable alternative to the general or neuraxial anesthesia in patients with severe pulmonary hypertension.展开更多
Background: Patients with critical limb ischemia (CLI) often suffer from severe pain. A continuous peripheral nerve block has been shown to provide effective analgesia for patients having lower limb surgery. We have b...Background: Patients with critical limb ischemia (CLI) often suffer from severe pain. A continuous peripheral nerve block has been shown to provide effective analgesia for patients having lower limb surgery. We have been administering continuous sciatic nerve block (CSNB) for patients with CLI whose pain could not be relieved by other analgesic tools. The aim of this retrospective study was to investigate the efficacy and safety of CSNB for patients with CLI. Method: We retrospectively investigated 99 patients who received CSNB for the relief of severe pain in the lower limb associated with CLI. Patient demographics, neurological history, complications, and subjective evaluation of the effectiveness of CSNB were investigated from their clinical records. The distal tips of 108 catheters were cultured. Result: One hundred and seventy-two catheters were placed in 99 patients. More than 90% of the patients enjoyed considerable relief of severe pain. The analgesic effect of CSNB was greater in patients with older age and hemodialysis. Thirty-one catheters had positive bacterial colonization. However, no severe infectious complication was found. There was no relationship between the co-existence of diabetes and positive bacterial colonization. We encountered a patient with ASO and diabetes who suffered from persistent motor weakness and hypesthesia even after 3 months of CSNB placement. Conclusions: CSNB provided good pain control for patients with severe pain caused by CLI. Although catheters were frequently found to be colonized, infection at the catheter site was self-limiting even in patients with diabetes.展开更多
The anesthetic implications of caring for patients with mitochondrial myopathies (MM) are not well defined, and the few case reports that have been published are contradictory. Local anesthetics particularly have the ...The anesthetic implications of caring for patients with mitochondrial myopathies (MM) are not well defined, and the few case reports that have been published are contradictory. Local anesthetics particularly have the potential to worsen neuromuscular manifestations via direct effects on mitochondrial bioenergetics. Here we describe the anesthetic management of a patient with chronic progressive external ophthalmoplegia (CPEO) in which a sciatic nerve block with ropivacaine and prilocaine was performed and review the available related literature.展开更多
The Background and Objectives: A sciatic nerve block at the level of the popliteal fossa is frequently administered for post-operative analgesia for surgery below the knee. While ultrasound continues to gain popularit...The Background and Objectives: A sciatic nerve block at the level of the popliteal fossa is frequently administered for post-operative analgesia for surgery below the knee. While ultrasound continues to gain popularity as the technique of choice for guiding needle positioning during peripheral nerve blocks, practitioners can begin to utilize ultrasound to look for patterns of anatomical significance. Recognizing anatomical variations among different demographic populations can help practitioners improve in performing nerve blocks. We aim to determine if predictable variability exists in sciatic nerve bifurcation location and depth at the level of the popliteal fossa. Methods: After IRB approval, eligible subjects were screened for ASA I or II status and demographic data was collected. Fifty subjects were enrolled. The SonoSite MicroMaxx? with 38-mm broadband linear array, 13-6 MHz probe with color Doppler and image capturing capabilities was used for ultrasound measurements. With subject lying prone, the location of the sciatic nerve in relation to the popliteal crease and skin-to-nerve distance were assessed via ultrasound. Two independent investigators confirmed nerve location for measurements. Analyses were performed with SAS version 9.1 using Pearson Correlation Coefficients and regression analysis. Results: Gender stratification revealed that, while males were both taller and heavier, skin-nerve measurements for depth were consistently deeper in females (p-value 0.02). Independent of the right or left leg, male gender and increased height decreases the skin-nerve distance, while increased weight increases the distance. There was no correlation between patient characteristics and crease-nerve distance. In some subjects, variability of crease-nerve distance even existed between their right and left leg. Conclusion: We show that significant variability exists for actual sciatic nerve bifurcation location, or target injection site, with consistently deeper skin depth values for female patients when compared to male patients, accounting for height and weight. These findings suggest visualization techniques such as ultrasound may lead to better localization of ideal injection sites.展开更多
Background: Pneumatic arterial tourniquet is a utilized strategy in limb surgeries to provide bloodless field to facilitate surgical procedure. Be that as it may, arterial tourniquet has numerous injurious impacts inc...Background: Pneumatic arterial tourniquet is a utilized strategy in limb surgeries to provide bloodless field to facilitate surgical procedure. Be that as it may, arterial tourniquet has numerous injurious impacts including hemodynamic changes and tourniquet-induced pain which sometimes can be severe and intolerable. Objectives: Our primary aim was to assess the impact of performing “Lumbar Plexus Block and sciatic nerve block” with General Anesthesia (GA) on the degree of arterial tourniquet-induced hemodynamic effects. On the other hand, our secondary aims were: amount of postoperative analgesic prerequisites, patient satisfactory score and documented side effects. Settings and Design: Ain Shams University, Orthopedic operating theatre;a prospective, randomized, double-blind study. Methods and Material: The physical status of 50 patients (both sexes) including I and II patients from American Society of Anesthesiologists, whose ages are from 20 - 40 years, is not so ideal when they are undergoing elective knee Arthroscopy. The duration lasts no more than ninety minutes under GA with application of tourniquet. Patients were allotted haphazardly to one of two groups. In Group C (Control group): Only GA. In Group B: LPB and sciatic nerve block were performed just before GA administration. Intraoperative hemodynamics was recorded at specific timings. Results: Incidence of tourniquet induced hypertension (TIH) was markedly less with Group B at: forty five, sixty, seventy five mins after tourniquet inflation and just before tourniquet deflation. Also, the total ketorolac consumption during first 24 hours of postoperative period was significantly less with Group B (p Conclusions: Combined Sciatic-Lumbar plexus blocks when combined with general anesthesia were very effective in attenuating TIH.展开更多
目的:分析超声引导下腰丛坐骨神经阻滞麻醉在老年胫骨平台骨折患者中的应用。方法:选取2021年7月—2023年7月菏泽市定陶区人民医院诊治的80例胫骨平台骨折老年患者为研究对象,采用随机数表法将其分为对照组40例,观察组40例,对照组采用...目的:分析超声引导下腰丛坐骨神经阻滞麻醉在老年胫骨平台骨折患者中的应用。方法:选取2021年7月—2023年7月菏泽市定陶区人民医院诊治的80例胫骨平台骨折老年患者为研究对象,采用随机数表法将其分为对照组40例,观察组40例,对照组采用全身麻醉,观察组采用超声引导下腰丛坐骨神经阻滞麻醉。对比两组围手术期动脉血氧分压(PaO_(2))、舒张压(DBP)、收缩压(SBP)、心率(HR)、应激反应[皮质醇(Cor)、去甲肾上腺素(NE)、肾上腺素(E)]、认知功能及术后不良反应发生情况。结果:两组麻醉前PaO_(2)、DBP、SBP、HR比较,差异无统计学意义(P>0.05);麻醉后15 min、麻醉后45 min、手术结束即刻,观察组PaO_(2)、DBP、SBP、HR均较对照组高,差异有统计学意义(P<0.05)。两组手术结束即刻应激反应指标比较,差异无统计学意义(P>0.05);两组术后2 h Cor、NE、E较手术结束即刻下降,但观察组术后2 h Cor、NE、E较对照组低,差异有统计学意义(P<0.05)。观察组术后1 d认知功能评分优于对照组,差异有统计学意义(P<0.05);观察组术后不良反应发生率明显低于对照组,差异有统计学意义(P<0.05)。结论:超声引导下腰丛坐骨神经阻滞麻醉相较于全身麻醉,不仅能够为老年胫骨平台骨折患者提供更加稳定的手术条件,还能减轻生理应激反应,同时对老年患者的认知功能影响更小,能降低术后不良反应发生风险。展开更多
文摘Aim: To study the features of local anesthetic solution spreading during sciatic nerve block in dependence on the anesthetic solution volume. Material and Methods: One hundred and sixty nine cases of sciatic nerve blocks done under ultrasonic visualization control were analyzed. Sciatic nerve blocks were performed by lidocaine in volumes 30;25;20;15;12.5;10;7.5;6.5;5;4.5 ml. The cross-section area, equal to local anesthetic spreading, was determined;the extension of the anesthetic solution spreading along sciatic nerve was calculated. Results: The anesthetic agent solution spreads along sciatic nerve in proximal and distal direction, forming a kind of cylinder. The minimum volume of the local anesthetic, which covers sciatic nerve in the whole, is 5 ml. A rare (1.77%) variation of sciatic nerve structure was described, in which tibial and common peroneal nerves develop directly from the branches of sacral plexus. Conclusion: The decrease of the local anesthetic volume leads to reduction of its spreading distance and cross-section area. Ultrasonic visualization can provide for sciatic nerve anatomical peculiarities, which can have an effect on the block quality.
文摘We report a patient with severe pulmonary arterial hypertension (PAH) undergoing tibio-talo-calcaneal fusion due to Charcot joint. Despite the advancement in the management of PAH, the risks of anesthesia, surgery, and postoperative morbidity and mortality still remain high. A 46-year-old female was presented with severe PAH and end stage renal disease requiring hemodialysis three times a week. Ultrasound-guided sciatic, femoral, and obturator nerve blocks were performed with 0.5% levobupivacaine 15 ml, 10 ml, and 5 ml, respectively. All the blocks were successful, and the patient underwent uneventful anesthesia and surgery. In addition, the postoperative pain control lasted for 15 h and the patient was discharged on POD 5 without any complications. Therefore, ultrasound-guided sciatic, femoral, and obturator nerve blocks are valuable alternative to the general or neuraxial anesthesia in patients with severe pulmonary hypertension.
文摘Background: Patients with critical limb ischemia (CLI) often suffer from severe pain. A continuous peripheral nerve block has been shown to provide effective analgesia for patients having lower limb surgery. We have been administering continuous sciatic nerve block (CSNB) for patients with CLI whose pain could not be relieved by other analgesic tools. The aim of this retrospective study was to investigate the efficacy and safety of CSNB for patients with CLI. Method: We retrospectively investigated 99 patients who received CSNB for the relief of severe pain in the lower limb associated with CLI. Patient demographics, neurological history, complications, and subjective evaluation of the effectiveness of CSNB were investigated from their clinical records. The distal tips of 108 catheters were cultured. Result: One hundred and seventy-two catheters were placed in 99 patients. More than 90% of the patients enjoyed considerable relief of severe pain. The analgesic effect of CSNB was greater in patients with older age and hemodialysis. Thirty-one catheters had positive bacterial colonization. However, no severe infectious complication was found. There was no relationship between the co-existence of diabetes and positive bacterial colonization. We encountered a patient with ASO and diabetes who suffered from persistent motor weakness and hypesthesia even after 3 months of CSNB placement. Conclusions: CSNB provided good pain control for patients with severe pain caused by CLI. Although catheters were frequently found to be colonized, infection at the catheter site was self-limiting even in patients with diabetes.
文摘The anesthetic implications of caring for patients with mitochondrial myopathies (MM) are not well defined, and the few case reports that have been published are contradictory. Local anesthetics particularly have the potential to worsen neuromuscular manifestations via direct effects on mitochondrial bioenergetics. Here we describe the anesthetic management of a patient with chronic progressive external ophthalmoplegia (CPEO) in which a sciatic nerve block with ropivacaine and prilocaine was performed and review the available related literature.
文摘The Background and Objectives: A sciatic nerve block at the level of the popliteal fossa is frequently administered for post-operative analgesia for surgery below the knee. While ultrasound continues to gain popularity as the technique of choice for guiding needle positioning during peripheral nerve blocks, practitioners can begin to utilize ultrasound to look for patterns of anatomical significance. Recognizing anatomical variations among different demographic populations can help practitioners improve in performing nerve blocks. We aim to determine if predictable variability exists in sciatic nerve bifurcation location and depth at the level of the popliteal fossa. Methods: After IRB approval, eligible subjects were screened for ASA I or II status and demographic data was collected. Fifty subjects were enrolled. The SonoSite MicroMaxx? with 38-mm broadband linear array, 13-6 MHz probe with color Doppler and image capturing capabilities was used for ultrasound measurements. With subject lying prone, the location of the sciatic nerve in relation to the popliteal crease and skin-to-nerve distance were assessed via ultrasound. Two independent investigators confirmed nerve location for measurements. Analyses were performed with SAS version 9.1 using Pearson Correlation Coefficients and regression analysis. Results: Gender stratification revealed that, while males were both taller and heavier, skin-nerve measurements for depth were consistently deeper in females (p-value 0.02). Independent of the right or left leg, male gender and increased height decreases the skin-nerve distance, while increased weight increases the distance. There was no correlation between patient characteristics and crease-nerve distance. In some subjects, variability of crease-nerve distance even existed between their right and left leg. Conclusion: We show that significant variability exists for actual sciatic nerve bifurcation location, or target injection site, with consistently deeper skin depth values for female patients when compared to male patients, accounting for height and weight. These findings suggest visualization techniques such as ultrasound may lead to better localization of ideal injection sites.
文摘Background: Pneumatic arterial tourniquet is a utilized strategy in limb surgeries to provide bloodless field to facilitate surgical procedure. Be that as it may, arterial tourniquet has numerous injurious impacts including hemodynamic changes and tourniquet-induced pain which sometimes can be severe and intolerable. Objectives: Our primary aim was to assess the impact of performing “Lumbar Plexus Block and sciatic nerve block” with General Anesthesia (GA) on the degree of arterial tourniquet-induced hemodynamic effects. On the other hand, our secondary aims were: amount of postoperative analgesic prerequisites, patient satisfactory score and documented side effects. Settings and Design: Ain Shams University, Orthopedic operating theatre;a prospective, randomized, double-blind study. Methods and Material: The physical status of 50 patients (both sexes) including I and II patients from American Society of Anesthesiologists, whose ages are from 20 - 40 years, is not so ideal when they are undergoing elective knee Arthroscopy. The duration lasts no more than ninety minutes under GA with application of tourniquet. Patients were allotted haphazardly to one of two groups. In Group C (Control group): Only GA. In Group B: LPB and sciatic nerve block were performed just before GA administration. Intraoperative hemodynamics was recorded at specific timings. Results: Incidence of tourniquet induced hypertension (TIH) was markedly less with Group B at: forty five, sixty, seventy five mins after tourniquet inflation and just before tourniquet deflation. Also, the total ketorolac consumption during first 24 hours of postoperative period was significantly less with Group B (p Conclusions: Combined Sciatic-Lumbar plexus blocks when combined with general anesthesia were very effective in attenuating TIH.
文摘目的:分析超声引导下腰丛坐骨神经阻滞麻醉在老年胫骨平台骨折患者中的应用。方法:选取2021年7月—2023年7月菏泽市定陶区人民医院诊治的80例胫骨平台骨折老年患者为研究对象,采用随机数表法将其分为对照组40例,观察组40例,对照组采用全身麻醉,观察组采用超声引导下腰丛坐骨神经阻滞麻醉。对比两组围手术期动脉血氧分压(PaO_(2))、舒张压(DBP)、收缩压(SBP)、心率(HR)、应激反应[皮质醇(Cor)、去甲肾上腺素(NE)、肾上腺素(E)]、认知功能及术后不良反应发生情况。结果:两组麻醉前PaO_(2)、DBP、SBP、HR比较,差异无统计学意义(P>0.05);麻醉后15 min、麻醉后45 min、手术结束即刻,观察组PaO_(2)、DBP、SBP、HR均较对照组高,差异有统计学意义(P<0.05)。两组手术结束即刻应激反应指标比较,差异无统计学意义(P>0.05);两组术后2 h Cor、NE、E较手术结束即刻下降,但观察组术后2 h Cor、NE、E较对照组低,差异有统计学意义(P<0.05)。观察组术后1 d认知功能评分优于对照组,差异有统计学意义(P<0.05);观察组术后不良反应发生率明显低于对照组,差异有统计学意义(P<0.05)。结论:超声引导下腰丛坐骨神经阻滞麻醉相较于全身麻醉,不仅能够为老年胫骨平台骨折患者提供更加稳定的手术条件,还能减轻生理应激反应,同时对老年患者的认知功能影响更小,能降低术后不良反应发生风险。
