Background: Shoulder surgery is performed in the beach chair position (BCP). The systemic arterial blood pressure (BP) must be increased to prevent cerebral hypoperfusion. However, it is not clear how the cardiac func...Background: Shoulder surgery is performed in the beach chair position (BCP). The systemic arterial blood pressure (BP) must be increased to prevent cerebral hypoperfusion. However, it is not clear how the cardiac function is affected when BP increase to maintain cerebral perfusion pressure in anesthetized patients. Methods: An analysis was performed using the data from 13 patients. We prepared a parallel circuit using a FloTrac Sensor transducer and an arterial BP transducer. Following the transfer of the patient to the BCP under general anesthesia, the FloTrac Sensor transducer was placed at the level of the fourth intercostal space, the arterial BP transducer was placed at the external auditory meatus level. We selected two points before surgery (120 s apart), during which the mean arterial BP (mABP) at the level of the brain was stable and at which the values in the supine position and the BCP were within 5 mmHg. Results: While the patients were in the supine position, the mean mABP at the mid-axillary level was 65.7 mmHg. In the BCP, the mean mABP was 66.5 mmHg at the external auditory meatus and 80.7 mmHg at the fourth intercostal space. The cardiac index changed from 2.2 (supine position) to 2.5 l/min/m2 (BCP). The stroke volume index was significantly increased from 35.8 to 42.3 ml/m2 (P = 0.003). The heart rate changed from 63.0 to 58.6 beats/min. The stroke volume variation was significantly decreased from 12.4% to 8.8% (P = 0.024). Conclusion: In order to ensure patient safety, close attention should be paid to the systemic cardiovascular changes that occur when the BP is increased.展开更多
Background: Propofol is often the drug of choice for ambulatory orthopedic cases. However, propofol can be associated with apnea or other events requiring airway interventions. Dexmedetomidine (Dex) has the unique pha...Background: Propofol is often the drug of choice for ambulatory orthopedic cases. However, propofol can be associated with apnea or other events requiring airway interventions. Dexmedetomidine (Dex) has the unique pharmacologic profile of providing sedation without respiratory depression. This is particularly relevant in patients with morbid obesity and/or challenging airways. The hypotheses were: 1) Propofol would cause more apnea or require more airway manipulations than dexmedetomidine;2) Propofol would have shorter post anesthesia unit recovery times;and 3) Dexmedetomidine would be associated with more bradycardia and hypotension. Methods: After IRB approval, 50 patients were randomized to receive either propofol or Dex for Total Intravenous anesthesia (TIVA) after interscalene brachial plexus block was performed preoperatively under ultrasound guidance. The main end points that we measured where: airway interventions, intra-operative bradycardia, hypotension, and PACU length of stay. Results: There were more airway interventions in the propofol group compared to the Dex group. Additionally, the Dex group had significantly longer PACU stays. Conclusion: We would recommend that Dex should be preferentially considered for patients predisposed to airway obstruction;however, the standard use of Dex over Propofol needed to reconsider since the use of Dex as the agent for TIVA was associated with longer PACU stays.展开更多
Paraplegia after non-cervical spine surgery under general anesthesia is a rare devastating postoperative complication [1]. A patient with shoulder pain was scheduled for shoulder arthroscopy due to rotator cuff repair...Paraplegia after non-cervical spine surgery under general anesthesia is a rare devastating postoperative complication [1]. A patient with shoulder pain was scheduled for shoulder arthroscopy due to rotator cuff repair. Arthroscopic shoulder surgery was performed with the patient in the beach-chair. Postoperatively, patients complained the weakness of both lower leg and marked numbness and tingling in the both arms. MRI showed a herniated intervertebral disc between C6 and C7 with spinal cord compression. Despite urgent discectomy, the patient remained dysesthesia of both upper extremities for 6 months. The purpose of this report is to introduce our case with a paraplegia observed after arthroscopic shoulder surgery in beach-chair position because of acute cervical herniation.展开更多
目的研究星状神经节阻滞对肩关节镜手术沙滩椅位脑血流动力学改变的影响。方法取择期行沙滩椅位肩关节镜手术患者40例,随机分为治疗组T组和对照组C组各20例,T组术前行超声引导下SGB,对比两组患者术中生命体征、BIS值、脑氧合饱和度(rSO_...目的研究星状神经节阻滞对肩关节镜手术沙滩椅位脑血流动力学改变的影响。方法取择期行沙滩椅位肩关节镜手术患者40例,随机分为治疗组T组和对照组C组各20例,T组术前行超声引导下SGB,对比两组患者术中生命体征、BIS值、脑氧合饱和度(rSO_(2))、不同时段大脑中动脉血流频谱图像、术后7 d ULCA评分、MMSE评分、RBANS总分,将两组数据进行统计学处理分析。结果T组比C组患者术中生命体征变化波动较小,差异有统计学意义(P<0.05)。不同时段rSO_(2)基本保持在相同水平,差异无统计学意义(P>0.05);T组患者大脑中动脉血流流速比C组要低,但血管内径要大,根据公式得出T组患者在不同时间段血流量都要比C组同时段的多,比较差异有统计学意义(P<0.05)。两组术后7 d ULCA评分、MMSE评分、RBANS总分对比T组明显较高,差异有统计学意义(P<0.05)。结论对沙滩椅位行肩关节镜手术的患者术前实施星状神经阻滞术具有增加脑血供及脑保护作用且对患者术后关节功能恢复有良好的促进作用,有临床推广实用价值。展开更多
文摘Background: Shoulder surgery is performed in the beach chair position (BCP). The systemic arterial blood pressure (BP) must be increased to prevent cerebral hypoperfusion. However, it is not clear how the cardiac function is affected when BP increase to maintain cerebral perfusion pressure in anesthetized patients. Methods: An analysis was performed using the data from 13 patients. We prepared a parallel circuit using a FloTrac Sensor transducer and an arterial BP transducer. Following the transfer of the patient to the BCP under general anesthesia, the FloTrac Sensor transducer was placed at the level of the fourth intercostal space, the arterial BP transducer was placed at the external auditory meatus level. We selected two points before surgery (120 s apart), during which the mean arterial BP (mABP) at the level of the brain was stable and at which the values in the supine position and the BCP were within 5 mmHg. Results: While the patients were in the supine position, the mean mABP at the mid-axillary level was 65.7 mmHg. In the BCP, the mean mABP was 66.5 mmHg at the external auditory meatus and 80.7 mmHg at the fourth intercostal space. The cardiac index changed from 2.2 (supine position) to 2.5 l/min/m2 (BCP). The stroke volume index was significantly increased from 35.8 to 42.3 ml/m2 (P = 0.003). The heart rate changed from 63.0 to 58.6 beats/min. The stroke volume variation was significantly decreased from 12.4% to 8.8% (P = 0.024). Conclusion: In order to ensure patient safety, close attention should be paid to the systemic cardiovascular changes that occur when the BP is increased.
文摘Background: Propofol is often the drug of choice for ambulatory orthopedic cases. However, propofol can be associated with apnea or other events requiring airway interventions. Dexmedetomidine (Dex) has the unique pharmacologic profile of providing sedation without respiratory depression. This is particularly relevant in patients with morbid obesity and/or challenging airways. The hypotheses were: 1) Propofol would cause more apnea or require more airway manipulations than dexmedetomidine;2) Propofol would have shorter post anesthesia unit recovery times;and 3) Dexmedetomidine would be associated with more bradycardia and hypotension. Methods: After IRB approval, 50 patients were randomized to receive either propofol or Dex for Total Intravenous anesthesia (TIVA) after interscalene brachial plexus block was performed preoperatively under ultrasound guidance. The main end points that we measured where: airway interventions, intra-operative bradycardia, hypotension, and PACU length of stay. Results: There were more airway interventions in the propofol group compared to the Dex group. Additionally, the Dex group had significantly longer PACU stays. Conclusion: We would recommend that Dex should be preferentially considered for patients predisposed to airway obstruction;however, the standard use of Dex over Propofol needed to reconsider since the use of Dex as the agent for TIVA was associated with longer PACU stays.
文摘Paraplegia after non-cervical spine surgery under general anesthesia is a rare devastating postoperative complication [1]. A patient with shoulder pain was scheduled for shoulder arthroscopy due to rotator cuff repair. Arthroscopic shoulder surgery was performed with the patient in the beach-chair. Postoperatively, patients complained the weakness of both lower leg and marked numbness and tingling in the both arms. MRI showed a herniated intervertebral disc between C6 and C7 with spinal cord compression. Despite urgent discectomy, the patient remained dysesthesia of both upper extremities for 6 months. The purpose of this report is to introduce our case with a paraplegia observed after arthroscopic shoulder surgery in beach-chair position because of acute cervical herniation.
文摘目的研究星状神经节阻滞对肩关节镜手术沙滩椅位脑血流动力学改变的影响。方法取择期行沙滩椅位肩关节镜手术患者40例,随机分为治疗组T组和对照组C组各20例,T组术前行超声引导下SGB,对比两组患者术中生命体征、BIS值、脑氧合饱和度(rSO_(2))、不同时段大脑中动脉血流频谱图像、术后7 d ULCA评分、MMSE评分、RBANS总分,将两组数据进行统计学处理分析。结果T组比C组患者术中生命体征变化波动较小,差异有统计学意义(P<0.05)。不同时段rSO_(2)基本保持在相同水平,差异无统计学意义(P>0.05);T组患者大脑中动脉血流流速比C组要低,但血管内径要大,根据公式得出T组患者在不同时间段血流量都要比C组同时段的多,比较差异有统计学意义(P<0.05)。两组术后7 d ULCA评分、MMSE评分、RBANS总分对比T组明显较高,差异有统计学意义(P<0.05)。结论对沙滩椅位行肩关节镜手术的患者术前实施星状神经阻滞术具有增加脑血供及脑保护作用且对患者术后关节功能恢复有良好的促进作用,有临床推广实用价值。
文摘目的探讨沙滩椅体位下行肩关节手术后发生股外侧皮神经麻痹(lateral femoral cutaneous nerve palsy,LFCNP)的危险因素。方法回顾性分析254例沙滩椅体位下行肩关节手术患者的临床资料。根据患者术后是否发生LFCNP分为LFCNP组(8例)和非LFCNP组(246例),记录比较2组患者的人口统计学特征、美国麻醉医师协会(American Society of Anesthesiologists,ASA)分级、术前合并症(高血压史、2型糖尿病史)、麻醉方法、围术期输液量、尿量、出血量、手术时间。将单因素方差分析中差异有统计学意义的指标纳入二元Logistic回归,分析沙滩椅体位下行肩关节手术后发生LFCNP的危险因素。结果LFCNP组体重指数(body mass index,BMI)明显大于非LFCNP组,手术时间明显长于非LFCNP组,差异均有统计学意义(P<0.05)。2组性别、年龄、身高、体重、ASA分级、术前并发症(高血压史、2型糖尿病史)、麻醉方法、输注液量、尿量、失血量差异均无统计学意义(P>0.05)。Logistic回归分析结果显示,BMI>28和手术时间>2 h是沙滩椅体位下行肩关节手术后发生LFCNP的危险因素。结论BMI>28和手术时间>2 h是沙滩椅体位下行肩关节手术后发生LFCNP的危险因素。
