Contralateral C7（cC7） root transfer to the healthy side is the main method for the treatment of brachial plexus root injury. A relatively new modification of this method involves cC7 root transfer to the lower trunk...Contralateral C7（cC7） root transfer to the healthy side is the main method for the treatment of brachial plexus root injury. A relatively new modification of this method involves cC7 root transfer to the lower trunk via the prespinal route. In the current study, we examined the effectiveness of this method using electrophysiological and histological analyses. To this end, we used a rat model of total brachial plexus injury, and cC7 root transfer was performed to either the lower trunk via the prespinal route or the median nerve via a subcutaneous tunnel to repair the injury. At 4, 8 and 12 weeks, the grasping test was used to measure the changes in grasp strength of the injured forepaw. Electrophysiological changes were examined in the flexor digitorum superficialis muscle. The change in the wet weight of the forearm flexor was also measured. Atrophy of the flexor digitorum superficialis muscle was assessed by hematoxylin-eosin staining. Toluidine blue staining was used to count the number of myelinated nerve fibers in the injured nerves. Compared with the traditional method, cC7 root transfer to the lower trunk via the prespinal route increased grasp strength of the injured forepaw, increased the compound muscle action potential maximum amplitude, shortened latency, substantially restored tetanic contraction of the forearm flexor muscles, increased the wet weight of the muscle, reduced atrophy of the flexor digitorum superficialis muscle, and increased the number of myelinated nerve fibers. These findings demonstrate that for finger flexion functional recovery in rats with total brachial plexus injury, transfer of the cC7 root to the lower trunk via the prespinal route is more effective than transfer to the median nerve via subcutaneous tunnel.展开更多
Objective:To study the application value of sevoflurane light general anesthesia via laryngeal mask airway combined with brachial plexus block for children with upper limb fractures. Methods:Children who underwent upp...Objective:To study the application value of sevoflurane light general anesthesia via laryngeal mask airway combined with brachial plexus block for children with upper limb fractures. Methods:Children who underwent upper limb fracture surgery in the First Women and Children's Hospital of Huizhou between June 2014 and April 2017 were selected as the research subjects and randomly divided into the combined group who accepted sevoflurane light general anesthesia via laryngeal mask airway combined with brachial plexus block and the control group who accepted sevoflurane light general anesthesia via laryngeal mask airway. The contents of inflammatory cytokines IL-1β, TNF-α, CRP, IL-10 and TGF-β as well as stress hormones FC, Ins, NE and E in serum were determined the same day and 3 days after operation.Results: The same day and 3 days after operation, the contents of IL-1β, TNF-α, CRP, IL-10, TGF-β, FC, Ins, NE and E in serum of combined group were significantly lower than those of control group.Conclusion: Sevoflurane light general anesthesia via laryngeal mask airway combined with brachial plexus block is more effective than sevoflurane light general anesthesia via laryngeal mask airway to suppress the inflammatory stress response in children with upper limb fracture surgery.展开更多
Experimental rats with root avulsion of the brachial plexus upper trunk were treated with the improved C34 transfer for neurotization of 05-6. Results showed that Terzis grooming test scores were significantly increas...Experimental rats with root avulsion of the brachial plexus upper trunk were treated with the improved C34 transfer for neurotization of 05-6. Results showed that Terzis grooming test scores were significantly increased at 6 months after treatment, the latency of C5-6 motor evoked potential was gradually shortened, and the amplitude was gradually increased. The rate of C3 instead of C5 and the C4 ＋ phrenic nerve instead of C6 myelinated nerve fibers crossing through the anastomotic stoma was approximately 80%. Myelinated nerve fibers were arranged loosely but the thickness of the myelin sheath was similar to that of the healthy side. In clinical applications, 39 patients with root avulsion of the brachial plexus upper trunk were followed for 6 months to 4.5 years after treatment using the improved C3 instead of C5 nerve root transfer and C4 nerve root and phrenic nerve instead of C6 nerve root transfer. Results showed that the strength of the brachial biceps and deltoid muscles recovered to level IIHV, scapular muscle to level Ill-W, latissimus dorsi and pectoralis major muscles to above level Ⅲ, and the brachial triceps muscle to level 0 Ill. Results showed that the improved 03-4 transfer for root avulsion of the brachial plexus upper trunk in animal models is similar to clinical findings and that C3-4 and the phrenic nerve transfer for neurotization of C5-6 can innervate the avulsed brachial plexus upper trunk and promote the recovery of nerve function in the upper extremity.展开更多
Brachial plexuses of 110 healthy volunteers were examined using high resolution color Doppler ultrasound. Ultrasonic characteristics and anatomic variation in the intervertebral foramen, interscalene, supraclavicular ...Brachial plexuses of 110 healthy volunteers were examined using high resolution color Doppler ultrasound. Ultrasonic characteristics and anatomic variation in the intervertebral foramen, interscalene, supraclavicular and infraclavicular, as well as the axillary brachial plexus were investigated. Results confirmed that the normal brachial plexus on cross section exhibited round or elliptic hypoechoic texture. Longitudinal section imaging showed many parallel linear hypo-moderate echoes, with hypo-echo. The transverse processes of the seventh cervical vertebra, the scalene space, the subclavian artery and the deep cervical artery are important markers in an examination. The display rates for the interscalene, and supraclavicular and axillary brachial plexuses were 100% each, while that for the infraclavicular brachial plexus was 97%. The region where the normal brachial plexus root traversed the intervertebral foramen exhibited a regular hypo-echo. The display rate for the C5-7 nerve roots was 100%, while those for C8 and T1 were 83% and 68%, respectively. A total of 20 of the 110 subjects underwent cervical CT scan. High-frequency ultrasound can clearly display the outline of the transverse processes of the vertebrae, which were consistent with CT results. These results indicate that high-frequency ultrasound provides a new method for observing the morphology of the brachial plexus. The C~ vertebra is a marker for identifying the position of brachial plexus nerve roots.展开更多
Background The use of traditional techniques （such as landmark techniques, paresthesia and peripheral nerve stimulator） for upper-limb anesthesia has often been restricted to the expert or enthusiast, which was blin...Background The use of traditional techniques （such as landmark techniques, paresthesia and peripheral nerve stimulator） for upper-limb anesthesia has often been restricted to the expert or enthusiast, which was blind. Recently, ultrasound （US） has been applied to differ blood vessel, pleura and nerve, thus may reduce the risk of complications while have a high rate of success. The aim of this study was to determine if the use of ultrasound guidance （vs. peripheral nerve stimulator, （PNS）） decreases risk of vascular puncture, risk of hemi-diaphragmatic paresis and risk of Homer syndrome and improves the success rate of nerve block. Methods A search strategy was developed to identify randomized control trials （RCTs） reporting on complications of US and PNS guidance for upper-extremity peripheral nerve blocks （brachial plexus） in adults available through PubMed databases, the Cochrane Central Register of Controlled Trials, Embase databases, SinoMed databases and Wanfang data （date up to 2011-12-20）. Two independent reviewers appraised eligible studies and extracted data. Risk ratios （OR） were calculated for each outcome and presented with 95% confidence intervals （CI） with the software of Review Manager 5.1.0 System （Cochrane Library）. Results Sixteen trials involving 1321 adults met our criteria were included for analysis. Blocks performed using US guidance were more likely to be successful （risk ratio （RR） for block success 0.36, 95% CI 0.23-0.56, P 〈0.00001）, decreased incidence of vascular puncture during block performance （RR 0.13, 95% CI 0.06-0.27, P 〈0.00001）, decreased the risk of complete hemi-diaphragmatic paresis （RR 0.09, 95% CI 0.03-0.52, P=-0.0001）. Conclusions US decreases risks of complete hemi-diaphragmatic paresis or vascular puncture and improves success rate of brachial plexus nerve block compared with techniques that utilize PNS for nerve localization. Larger studies are needed to determine whether or not the use of US can decrease risk of neurologic complications.展开更多
Although some patients have successful peripheral nerve regeneration,a poor recovery of hand function often occurs after peripheral nerve injury.It is believed that the capability of brain plasticity is crucial for th...Although some patients have successful peripheral nerve regeneration,a poor recovery of hand function often occurs after peripheral nerve injury.It is believed that the capability of brain plasticity is crucial for the recovery of hand function.The supplementary motor area may play a key role in brain remodeling after peripheral nerve injury.In this study,we explored the activation mode of the supplementary motor area during a motor imagery task.We investigated the plasticity of the central nervous system after brachial plexus injury,using the motor imagery task.Results from functional magnetic resonance imaging showed that after brachial plexus injury,the motor imagery task for the affected limbs of the patients triggered no obvious activation of bilateral supplementary motor areas.This result indicates that it is difficult to excite the supplementary motor areas of brachial plexus injury patients during a motor imagery task,thereby impacting brain remodeling.Deactivation of the supplementary motor area is likely to be a serious problem for brachial plexus injury patients in terms of preparing,initiating and executing certain movements,which may be partly responsible for the unsatisfactory clinical recovery of hand function.展开更多
基金supported by the National Natural Science Foundation of China,No.81572127
文摘Contralateral C7（cC7） root transfer to the healthy side is the main method for the treatment of brachial plexus root injury. A relatively new modification of this method involves cC7 root transfer to the lower trunk via the prespinal route. In the current study, we examined the effectiveness of this method using electrophysiological and histological analyses. To this end, we used a rat model of total brachial plexus injury, and cC7 root transfer was performed to either the lower trunk via the prespinal route or the median nerve via a subcutaneous tunnel to repair the injury. At 4, 8 and 12 weeks, the grasping test was used to measure the changes in grasp strength of the injured forepaw. Electrophysiological changes were examined in the flexor digitorum superficialis muscle. The change in the wet weight of the forearm flexor was also measured. Atrophy of the flexor digitorum superficialis muscle was assessed by hematoxylin-eosin staining. Toluidine blue staining was used to count the number of myelinated nerve fibers in the injured nerves. Compared with the traditional method, cC7 root transfer to the lower trunk via the prespinal route increased grasp strength of the injured forepaw, increased the compound muscle action potential maximum amplitude, shortened latency, substantially restored tetanic contraction of the forearm flexor muscles, increased the wet weight of the muscle, reduced atrophy of the flexor digitorum superficialis muscle, and increased the number of myelinated nerve fibers. These findings demonstrate that for finger flexion functional recovery in rats with total brachial plexus injury, transfer of the cC7 root to the lower trunk via the prespinal route is more effective than transfer to the median nerve via subcutaneous tunnel.
文摘Objective:To study the application value of sevoflurane light general anesthesia via laryngeal mask airway combined with brachial plexus block for children with upper limb fractures. Methods:Children who underwent upper limb fracture surgery in the First Women and Children's Hospital of Huizhou between June 2014 and April 2017 were selected as the research subjects and randomly divided into the combined group who accepted sevoflurane light general anesthesia via laryngeal mask airway combined with brachial plexus block and the control group who accepted sevoflurane light general anesthesia via laryngeal mask airway. The contents of inflammatory cytokines IL-1β, TNF-α, CRP, IL-10 and TGF-β as well as stress hormones FC, Ins, NE and E in serum were determined the same day and 3 days after operation.Results: The same day and 3 days after operation, the contents of IL-1β, TNF-α, CRP, IL-10, TGF-β, FC, Ins, NE and E in serum of combined group were significantly lower than those of control group.Conclusion: Sevoflurane light general anesthesia via laryngeal mask airway combined with brachial plexus block is more effective than sevoflurane light general anesthesia via laryngeal mask airway to suppress the inflammatory stress response in children with upper limb fracture surgery.
基金supported by the Military Medicine and Health Research Foundation of China,No.06M098, CWS11J240
文摘Experimental rats with root avulsion of the brachial plexus upper trunk were treated with the improved C34 transfer for neurotization of 05-6. Results showed that Terzis grooming test scores were significantly increased at 6 months after treatment, the latency of C5-6 motor evoked potential was gradually shortened, and the amplitude was gradually increased. The rate of C3 instead of C5 and the C4 ＋ phrenic nerve instead of C6 myelinated nerve fibers crossing through the anastomotic stoma was approximately 80%. Myelinated nerve fibers were arranged loosely but the thickness of the myelin sheath was similar to that of the healthy side. In clinical applications, 39 patients with root avulsion of the brachial plexus upper trunk were followed for 6 months to 4.5 years after treatment using the improved C3 instead of C5 nerve root transfer and C4 nerve root and phrenic nerve instead of C6 nerve root transfer. Results showed that the strength of the brachial biceps and deltoid muscles recovered to level IIHV, scapular muscle to level Ill-W, latissimus dorsi and pectoralis major muscles to above level Ⅲ, and the brachial triceps muscle to level 0 Ill. Results showed that the improved 03-4 transfer for root avulsion of the brachial plexus upper trunk in animal models is similar to clinical findings and that C3-4 and the phrenic nerve transfer for neurotization of C5-6 can innervate the avulsed brachial plexus upper trunk and promote the recovery of nerve function in the upper extremity.
基金funded by the Fundamental Research Funds for the Higher Learning Schools of Youth Teacher Education Program of Sun Yat-sen University in 2009,No.09YKPY05the Natural Science Foundation of Guangdong Province,No.S2011010004708
文摘Brachial plexuses of 110 healthy volunteers were examined using high resolution color Doppler ultrasound. Ultrasonic characteristics and anatomic variation in the intervertebral foramen, interscalene, supraclavicular and infraclavicular, as well as the axillary brachial plexus were investigated. Results confirmed that the normal brachial plexus on cross section exhibited round or elliptic hypoechoic texture. Longitudinal section imaging showed many parallel linear hypo-moderate echoes, with hypo-echo. The transverse processes of the seventh cervical vertebra, the scalene space, the subclavian artery and the deep cervical artery are important markers in an examination. The display rates for the interscalene, and supraclavicular and axillary brachial plexuses were 100% each, while that for the infraclavicular brachial plexus was 97%. The region where the normal brachial plexus root traversed the intervertebral foramen exhibited a regular hypo-echo. The display rate for the C5-7 nerve roots was 100%, while those for C8 and T1 were 83% and 68%, respectively. A total of 20 of the 110 subjects underwent cervical CT scan. High-frequency ultrasound can clearly display the outline of the transverse processes of the vertebrae, which were consistent with CT results. These results indicate that high-frequency ultrasound provides a new method for observing the morphology of the brachial plexus. The C~ vertebra is a marker for identifying the position of brachial plexus nerve roots.
文摘Background The use of traditional techniques （such as landmark techniques, paresthesia and peripheral nerve stimulator） for upper-limb anesthesia has often been restricted to the expert or enthusiast, which was blind. Recently, ultrasound （US） has been applied to differ blood vessel, pleura and nerve, thus may reduce the risk of complications while have a high rate of success. The aim of this study was to determine if the use of ultrasound guidance （vs. peripheral nerve stimulator, （PNS）） decreases risk of vascular puncture, risk of hemi-diaphragmatic paresis and risk of Homer syndrome and improves the success rate of nerve block. Methods A search strategy was developed to identify randomized control trials （RCTs） reporting on complications of US and PNS guidance for upper-extremity peripheral nerve blocks （brachial plexus） in adults available through PubMed databases, the Cochrane Central Register of Controlled Trials, Embase databases, SinoMed databases and Wanfang data （date up to 2011-12-20）. Two independent reviewers appraised eligible studies and extracted data. Risk ratios （OR） were calculated for each outcome and presented with 95% confidence intervals （CI） with the software of Review Manager 5.1.0 System （Cochrane Library）. Results Sixteen trials involving 1321 adults met our criteria were included for analysis. Blocks performed using US guidance were more likely to be successful （risk ratio （RR） for block success 0.36, 95% CI 0.23-0.56, P 〈0.00001）, decreased incidence of vascular puncture during block performance （RR 0.13, 95% CI 0.06-0.27, P 〈0.00001）, decreased the risk of complete hemi-diaphragmatic paresis （RR 0.09, 95% CI 0.03-0.52, P=-0.0001）. Conclusions US decreases risks of complete hemi-diaphragmatic paresis or vascular puncture and improves success rate of brachial plexus nerve block compared with techniques that utilize PNS for nerve localization. Larger studies are needed to determine whether or not the use of US can decrease risk of neurologic complications.
基金supported by the Youth Researcher Foundation of Shanghai Health Development Planning Commission,No.20124319
文摘Although some patients have successful peripheral nerve regeneration,a poor recovery of hand function often occurs after peripheral nerve injury.It is believed that the capability of brain plasticity is crucial for the recovery of hand function.The supplementary motor area may play a key role in brain remodeling after peripheral nerve injury.In this study,we explored the activation mode of the supplementary motor area during a motor imagery task.We investigated the plasticity of the central nervous system after brachial plexus injury,using the motor imagery task.Results from functional magnetic resonance imaging showed that after brachial plexus injury,the motor imagery task for the affected limbs of the patients triggered no obvious activation of bilateral supplementary motor areas.This result indicates that it is difficult to excite the supplementary motor areas of brachial plexus injury patients during a motor imagery task,thereby impacting brain remodeling.Deactivation of the supplementary motor area is likely to be a serious problem for brachial plexus injury patients in terms of preparing,initiating and executing certain movements,which may be partly responsible for the unsatisfactory clinical recovery of hand function.
