OBJECTIVE: To investigate the effectiveness of endoscopic-assisted median nerve decompression with one-stage extensor indicis proprius (EIP) tendon transfer for reconstruction of thumb abduction in patients with severe carpal tunnel syndrome (CTS). METHODS: The clinical data of 12 patients with severe CTS who met the selection criteria between December 2019 and December 2024 were retrospectively analyzed. There were 2 males and 10 females with an average age of 55.4 years ranging from 35 to 67 years. The symptom duration of CTS was 12-120 months (mean, 48.7 months) and the thenar muscle atrophy duration was 6-48 months (mean, 13.4 months). The median nerve was released with the help of endoscope, and the EIP tendon was transferred to reconstruct the abduction function of the thumb. The operation time and complications were recorded. Two-point discrimination, palmar abduction angle of the thumb, radial abduction angle of the thumb, and pinch force of the thumb were measured and compared before operation and at last follow-up, and the effectiveness was evaluated by Kapandji score and Disabilities of the Arm, Shoulder and Hand (DASH) score. The satisfaction of the operation was evaluated at last follow-up. RESULTS: All surgeries were successfully completed with a mean operation time of 54 minutes (range, 45-68 minutes). All patients were followed up 6-50 months, with an average of 15.3 months. There was no complications such as wound infection, scar pain of wrist, or tendon rupture of transposition, and there were 3 cases of mild limitation of finger extension in the donor site of index finger. At last follow-up, two-point discrimination, palmar abduction angle of the thumb, radial abduction angle of the thumb, Kapandji score, and DASH score were significantly better than those before operation ( P<0.05), but there was no significant difference in thumb pinch force between pre- and post-operation ( P>0.05). The evaluation of surgical satisfaction showed that 7 cases were very satisfied and 5 cases were satisfied. CONCLUSION The combination of endoscopic-assisted median nerve decompression and one-stage EIP tendon transfer effectively improves hand function and quality of life in patients with severe CTS by restoring thumb abduction and alleviating neurological symptoms.
Humans ; Tendon Transfer/methods* ; Male ; Middle Aged ; Carpal Tunnel Syndrome/physiopathology* ; Female ; Decompression, Surgical/methods* ; Aged ; Adult ; Thumb/physiopathology* ; Endoscopy/methods* ; Retrospective Studies ; Median Nerve/surgery* ; Treatment Outcome ; Plastic Surgery Procedures/methods*

Accessory Nerve ; transplantation ; Birth Injuries ; complications ; surgery ; Brachial Plexus Neuropathies ; etiology ; surgery ; Child, Preschool ; Early Medical Intervention ; Elbow ; Humans ; Infant ; Intercostal Nerves ; transplantation ; Nerve Transfer ; methods ; Radial Nerve ; surgery ; Sural Nerve ; transplantation ; Time Factors ; Treatment Outcome ; Ulnar Nerve ; transplantation

BACKGROUNDContralateral C7 (cC7) transfer had been widely used in many organizations in the world, but the outcomes were significantly different. So the purpose of the study was to evaluate the outcome of patients treated with cC7 transferring to median nerve and to determine the factors affecting the outcome of this procedure.

METHODSA retrospective review of 51 patients with total root avulsion brachial plexus injuries who underwent cC7 transfer was conducted. All of the surgeries were performed with two surgery stages and median nerve was the recipient nerve. The cC7 nerve was used in three different ways. The entire C7 root was used in 11 patients; the posterior division together with the lateral part of the anterior division was used in 15 patients; the anterior or the posterior division alone was used in 25 patients. The mean follow-up period was 6.9 years.

RESULTSThe efficiency of the surgery in these 51 patients was 49.02% in motor and 62.75% in sensory function. The patients with entire C7 root transfer obtained significantly better recovery in both motor and sensory function than the patients with partial C7 transfer. The best function recovery could be induced if the interval between the two surgery stages was 4-8 months.

CONCLUSIONScC7 transfer is an effective procedure in repairing median nerve. But using the entire C7 root transfer can obtain better recovery; so we emphasize using the entire root as the donor. The optimal interval between two surgery stages is 4-8 months.

Adolescent ; Adult ; Brachial Plexus ; surgery ; Child ; Female ; Humans ; Male ; Median Nerve ; surgery ; Middle Aged ; Nerve Transfer ; methods ; Retrospective Studies ; Young Adult

In this case series study, we assessed the effects of recession-resection surgery augmented with botulinum toxin A chemodenervation for patients with chronic paralytic horizontal strabismus. In addition, we compared these effects with those of full tendon transposition (FTT) augmented with posterior intermuscular suture (PIMS). Ten patients who underwent strabismus surgery due to paralytic horizontal strabismus were retrospectively reviewed. They received a recession-resection surgery augmented with botulinum toxin A chemodenervation (type I surgery) or a FTT augmented with PIMS (type II surgery). The preoperative angle of deviation (AOD) and postoperative improvement in AOD were compared according to the type of procedure. The preoperative AOD was 60.00 +/- 28.50 prism diopters (PD) for type I surgery and 68.00 +/- 27.06 PD for type II (p = 0.421). Improvement in AOD was 53.20 +/- 25.01 PD for type I surgery and 44.20 +/- 18.74 PD for type II (p = 0.548). Recession-resection surgery augmented with botulinum toxin A chemodenervation is a concise and effective procedure for treating paralytic horizontal strabismus.
Adolescent ; Botulinum Toxins, Type A/*therapeutic use ; Humans ; Male ; Middle Aged ; Nerve Block/*methods ; Neuromuscular Agents/*therapeutic use ; Oculomotor Muscles/*transplantation ; Ophthalmologic Surgical Procedures/*methods ; Strabismus/etiology/*therapy ; Suture Techniques ; Tendon Transfer/*methods

OBJECTIVETo observe the primary result of finger flexion reconstruction in the procedure of direct anastomosis of contralateral C(7) transferred through the prespinal route with lower trunk in children suffered traumatic brachial plexus root avulsion injury.

METHODSOn the healthy side, the C(7) nerve root was identified anatomically and transected at the level of division by dissecting its anterior and posterior division as far distal as possible up to the level where the nerve fibers interweaving with other division, then the contralateral C(7) nerve root was dissected proximally up to the neuroforamina. The contralateral C(7) nerve root was transferred to contralateral side through the prespinal route. The entire brachial plexus of suffered side was exposed through the union incision superior and inferior to the clavicle, The lower trunk was identified and dissected proximally to the C(8) and T(1) nerve root which were severed at the lateral margin of anterior scalenus, and then the dorsal division and anterior medial pectoral nerve of lower trunk were severed. The median nerve, ulnar nerve and medial antebrachial cutaneous nerve were identified from the origin and dissected distally continue to the midpoint of upper arm, and lateral head of the median nerve was severed so that the lower trunk, medial cord and median nerve, ulnar nerve and medial antebrachial cutaneous nerve can be fully mobilized. Anteriorly flexion and adduction of the should at 0 degrees and flexion elbow at 90 degrees , this could allow considerable length to be gained when pulling the lower trunk proximally, direct anastomosis of contralateral C(7) with lower trunk was performed. If there was any tension exist, the appropriate humerus shorten osteotomy should be performed. From August 2004 to December 2008, 20 children including 13 cases with total brachial plexus nerve root avulsion injury and 7 cases with middle and lower trunk avulsion injury were repaired by this procedure. Twenty cases including 16 males and 4 females, the average age was 13 years with a range of 5 to 18 years. The interval from injury to operation ranged 1 to 11 months with a mean of 4.6 months. Eleven patients were performed the humeral shorten osteotomy, the length of the humeral shorten was 2.0 - 4.5 cm, with the mean of (3.1 +/- 0.7) cm.

RESULTSThe follow up period was 12 to 51 months, with the average of 26 months. The muscle strength of finger flexion attained M 4 in 18 cases, M 2 in 2 cases. The motor function of thumb flexion gained M 4 in 10 cases, M 3 in 8 cases, M2 in 2 cases. Of the 2 cases achieved motor function of intrinsic muscles of the hand of M3.

CONCLUSIONSThe direct anastomosis of contralateral C(7) with lower trunk in children with traumatic brachial plexus avulsion injury can improve the effect of reconstructing the function of finger flexion because it reduces one never anastomosis site and decreases the distance of nerve regeneration compared with the traditional method. With this modified procedure, the functional recovery of intrinsic muscles of the hand in children with traumatic brachial plexus avulsion injury is becoming possible.

Adolescent ; Anastomosis, Surgical ; Brachial Plexus ; injuries ; surgery ; Child ; Child, Preschool ; Female ; Follow-Up Studies ; Humans ; Male ; Nerve Transfer ; methods ; Treatment Outcome

BACKGROUND: The aim of this study was to evaluate the contribution of the proximal nerve stump, in end-to-side nerve repair, to functional recovery, by modifying the classic end-to-side neurorrhaphy and suturing the proximal nerve stump to a donor nerve in a rat model of a severed median nerve. METHODS: Three experimental groups were studied: a modified end-to-side neurorrhaphy with suturing of the proximal nerve stump (double end-to-side neurorrhaphy, Group I), a classic end-to-side neurorrhaphy (Group II) and a control group without neurorrhaphy (Group III). Twenty weeks after surgery, grasping testing, muscle contractility testing, and histological studies were performed. RESULTS: The grasping strength, muscle contraction force and nerve fiber count were significantly higher in group I than in group II, and there was no evidence of nerve recovery in group III. CONCLUSIONS: The contribution from the proximal nerve stump in double end-to-side nerve repair might improve axonal sprouting from the donor nerve and help achieve a better functional recovery in an end-to-side coaptation model.
Anastomosis, Surgical/methods ; Animals ; Axons/pathology ; Forelimb ; Hand Strength ; Male ; Median Nerve/pathology/*surgery ; Muscle Contraction ; Muscle, Skeletal/physiopathology ; Nerve Regeneration ; Nerve Transfer/*methods ; Rats ; Rats, Sprague-Dawley ; Recovery of Function ; Ulnar Nerve/pathology/*surgery

OBJECTIVETo experimentally compare the treatment outcome of the injured upper limb of the root avulsion of C5 and C6 of the brachial plexus repaired by ipsilateral C7 nerve root transfer and other three multiple nerve transfers.

METHODSOne hundred and twenty SD rats of simulated C5 and C6 root avulsion randomly divided into 4 groups, and 30 each underwent various combined nerve transfers. Group A: the ipsilateral C7 root transferred to the upper trunk of brachial plexus and the spinal accessory nerve to the suprascapular nerve; Group B: partial fascicles of the ulnar nerve transferred to the biceps branch (Oberlin's procedure), the spinal accessory to the suprascapular and branches to the triceps long head to the axillary nerve; Group C: the phrenic transferred to the musculocutaneous, cervical plexus motor branches to the lower trunk (axillary nerve) of brachial plexus and the spinal accessory nerve to the suprascapular nerve; Group D: the phrenic transferred to the musculocutaneous and the spinal accessory nerve to the suprascapular nerve. Neurotization outcomes were evaluated at 3, 6 and 12 weeks postoperatively by comparing changes of behavioral tests (Ochiai clinical scores, Barth Foot-fault test and Terzis grooming test), neurophysiological investigations and muscular histology.

RESULTSAt 3 weeks after operation, no significant difference was found between Group A and other three control groups in the three behavioral evaluations. Neurophysiologic investigations of the axillary nerve showed that Group A was superior to the other three groups. Muscular histological outcome of the axillary nerve and deltoid muscle showed that Group A was superior to the Group C and D, while no significant difference was found between Group A and B. Except that the thruput of regenerating medullated musculocutaneous nerve fibers of Group A was superior to Group C, neurophysiological and histological outcome of the musculocutaneous nerve and biceps showed that no significant difference was found between Group A and other three groups. At 12 weeks postoperatively, nearly all the behavioral, neurophysiological and histological determination showed that Group A was superior to the other three groups.

CONCLUSIONSIpsilateral C7 transfer to the upper trunk of brachial plexus combined with the spinal accessory nerve to the suprascapular nerve is found to be significantly effective on treatment of the root avulsion of C5 and C6 of the brachial plexus.

Animals ; Brachial Plexus ; injuries ; Disease Models, Animal ; Nerve Transfer ; methods ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Spinal Nerve Roots ; surgery

BACKGROUNDThere are few effective methods for treating injuries to the lower trunk of brachial plexus, and the curative effect is usually poor. The purpose of this study was to provide anatomic references for transferring the brachialis muscle branch of musculocutaneous nerve (BMBMCN) for selective neurotization of finger flexion in brachial plexus lower trunk injury, and to evaluate its clinical curative effects.

METHODSMicroanatomy and measurement were done on 50 limbs from 25 adult human cadavers to observe the origin, branch, type of the BMBMCN and median nerve, as well as their adjacent structures. Internal topographic features of the fascicular groups of the median nerve at the level of the BMBMCN were observed. In addition, the technique of BMBMCN transfer for selective neurotization of finger flexion of the median nerve was designed and tested in 6 fresh adult human cadavers. Acetylcholinesterase (AchE) staining of the BMBMCN and median nerve was done to observe the features of the nerve fibers. This technique was clinically tried to restore digital flexion in 6 cases of adult brachial plexus lower trunk injury. These cases were followed up for 3, 6, 9 and 12 months postoperatively. Recovery of function, grip strength, nerve electrophysiology and muscle power of the affected limbs were observed and measured.

RESULTSThe brachialis muscle was totally innervated by the musculocutaneous nerve (MCN). Based on the Hunter's line, the level of the origin of the BMBMCN was (13.18 +/- 2.77) cm. AchE histochemical staining indicated that the BMBMCN were totally made up of medullated nerve fibers. At the level of the BMBMCN, the median nerve consistently collected into three fascicular groups as shown by microanatomy in combination with AchE stain. The posterior fascicular group was mainly composed of anterior interosseous nerves and branches to the palmaris longus. The technique was tested in six fresh cadavers successfully, except that stoma split occurred in one case. Five of the six cases recovered digital flexion 12 months after operation, and at the same time grip strength, muscle power, and nerve electrophysiology also recovered markedly.

CONCLUSIONSThe technique of transferring the BMBMCN for selective neurotization of finger flexion is anatomically safe and effective, with satisfactory clinical outcomes.

Acetylcholinesterase ; analysis ; Adult ; Brachial Plexus ; anatomy & histology ; injuries ; Brachial Plexus Neuropathies ; surgery ; Clinical Trials as Topic ; Female ; Humans ; Male ; Middle Aged ; Musculocutaneous Nerve ; transplantation ; Nerve Transfer ; methods ; Retrospective Studies

OBJECTIVETo investigate the compensative mechanism of no further impairment of the upper limb after ipsilateral C(7) transfer for treatment of root avulsion of C(5)-C(6) of the brachial plexus.

METHODSSixty Sprague Dawley (SD) rats were randomly divided into a C7-transection group and a control group, 30 rats each. In the C(7)-transection group, the left forelimbs of the animals underwent transection of ipsilateral C(7) nerve root while C(5) and C(6) nerve roots were avulsed. In the control group, the left forelimbs only underwent C(5) and C(6) root avulsion. The representative muscles of C(7) (innervated mainly by C(7)) including latissimus dorsi, triceps, extensor carpi radialis brevis and extensor digitorum communis were evaluated with neurophysiological investigation, muscular histology and motor end plate histomorphometry 3, 6 and 12 weeks after operation. The right forelimbs of all rats were taken as the control sides.

RESULTSThree weeks after operation, the recovery rates of amplitudes of compound muscle action potential (CMAP) and CMAP latency, muscular wet weight and cross-sectional area of muscle fibers, and area of postsynaptic membranes of those four representative muscles in the C(7)-transection group were significantly lower than those of the control group (P less than 0.05 or P less than 0.01). Six weeks postoperatively, the recovery rates of CMAP amplitude and latency of the triceps showed no significant difference between the C(7)-transection group and the control group (P larger than 0.05). For the extensor carpi radialis brevis and the extensor digitorum communis, the recovery rates of the cross-sectional area of muscle fibers, the amplitude and latency of CMAP and the area of postsynaptic membranes showed no significant difference between the two groups (P larger than 0.05), while the rest parameters were still significantly different between the two group (P less than 0.05 or P less than 0.01). As far as the ultramicrostructure was concerned in the C(7)-transection group, more motor end plates of four representative muscles were observed and their ultramicrostructure also had a tendency to mature as compared with those of 3 weeks postoperatively. Twelve weeks after operation, all parameters of the C(7)-transection group were not significantly different from those of the control group (P >0.05). In the C7-transection group, the motor end plates were densely distributed and their ultramicrostructure in four representative muscles appeared to be mature as compared with those of the control group.

CONCLUSIONSAfter ipsilateral C(7) transfer for treatment of root avulsion of C(5)-C(6) of the brachial plexus, the nerve fibers of the lower trunk can compensatively innervate fibers of C(7)-representative muscles by means of motor end plate regeneration, so there is no further impairment on the injured upper limb.

Animals ; Brachial Plexus ; injuries ; surgery ; Motor Endplate ; ultrastructure ; Nerve Transfer ; methods ; Rats ; Rats, Sprague-Dawley ; Spinal Nerve Roots ; injuries ; Upper Extremity ; physiology

OBJECTIVECombine olfactory ensheathing glia (OEG) implantation with ex vivo non-viral vector-based neurotrophin-3 (NT-3) gene therapy in attempting to enhance regeneration after thoracic spinal cord injury (SCI).

METHODSPrimary OEG were transfected with cationic liposome-mediated recombinant plasmid pcDNA3.1(+)-NT3 and subsequently implanted into adult Wistar rats directly after the thoracic spinal cord (T9) contusion by the New York University impactor. The animals in 3 different groups received 4x10(5) OEG transfected with pcDNA3.1(+)-NT3 or pcDNA3.1(+) plasmids, or the OEGs without any plasmid transfection, respectively; the fourth group was untreated group, in which no OEG was implanted.

RESULTSNT-3 production was seen increased both ex vivo and in vivo in pcDNA3.1(+)-NT3 transfected OEGs. Three months after implantation of NT-3-transfected OEGs, behavioral analysis revealed that the hindlimb function of SCI rats was improved. All spinal cords were filled with regenerated neurofilament-positive axons. Retrograde tracing revealed enhanced regenerative axonal sprouting.

CONCLUSIONNon-viral vector-mediated genetic engineering of OEG was safe and more effective in producing NT-3 and promoting axonal outgrowth followed by enhancing SCI recovery in rats.

Animals ; Animals, Newborn ; Brain Tissue Transplantation ; methods ; Cells, Cultured ; DNA, Recombinant ; therapeutic use ; Disease Models, Animal ; Female ; Gene Transfer Techniques ; Genetic Therapy ; methods ; Genetic Vectors ; genetics ; Graft Survival ; genetics ; Growth Cones ; metabolism ; ultrastructure ; Nerve Regeneration ; genetics ; Neuroglia ; metabolism ; transplantation ; Neurotrophin 3 ; biosynthesis ; genetics ; Olfactory Bulb ; cytology ; transplantation ; Paralysis ; metabolism ; physiopathology ; therapy ; Plasmids ; genetics ; Rats ; Rats, Wistar ; Recovery of Function ; genetics ; Spinal Cord Injuries ; metabolism ; physiopathology ; therapy ; Treatment Outcome ; Up-Regulation ; genetics