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*

INTRODUCTION: In patients with delayed presentation between 6 to 12 months, surgical treatment guidelines are not well defined in brachial plexus injury. Still, several authors have agreed that functional outcomes in patients treated within six months from the date of injury have the best results. Nerve transfers are still considered one of the treatment options in the said subset of patients even after six months. In contrast, a primary Steindler flexorplasty, or proximal advancement of the flexor-pronator group, is an ideal technique for elbow flexion with an elapsed time from injury >6 to 9 months. OBJECTIVE: The purpose of this investigation was to compare the clinical outcome s of nerve transfers versus modified Steindler flexorplasty for the restoration of elbow flexion in upper type brachial plexus injuries (BPI). METHODS: A retrospective review of 28 patients who underwent nerve transfers (NT) and 12 patients who underwent modified Steindler flexorplasty (MSF) was done to determine the outcome of treatments. The manual muscle testing using the Medical Research Council scaling system, Visual Analog Scale for pain, active range of motion, and Disabilities of the Arm, Shoulder and Hand form scores were taken as dependent variables. RESULTS: The NT group had a median age of 27.5 years, with 26 men, a median surgical delay of 5.6 months, and a median follow-up of 33 months. Twenty out of 28 patients (71%) had ≥M3 with a median range of 117.6° elbow flexion motion. Median postoperative DASH (n=16) and VAS scores were 29.2 and 3, respectively. For the MSF patients, the median age was 27 years, including ten men, the median surgical delay was 12 months, and the median follow-up was 18.4 months. All the 12 patients had ≥M3, with a median range of motion of 106°. The median postoperative DASH score (n=5) and VAS score were 28.3 and 0, respectively. In the NT group, 73.3% (11/15) achieved ≥M3 elbow flexion if the operation was done in <6 months. CONCLUSION: Nerve transfers and the modified Steindler procedure are still excellent options for successful elbow flexion reanimation in patients with brachial plexus injuries. Our results also showed that those with surgical delays of less than six months had the highest rate of achieving ≥M3 elbow flexion strength in the nerve transfer group.
Nerve Transfer ; Elbow ; Brachial Plexus ; Elbow Joint ; Range of Motion, Articular

Objective: To investigate the outcomes of masseter nerve-innervated free gracilis muscle transfer for smile reanimation in adults and to explore surgical indications. Methods: A retrospective chart review of 37 patients (11 males, 26 females, with (40.3±12.7) years old)who underwent masseter nerve-innervated free gracilis muscle transfer for smile reanimation between 2016 and 2017 was performed. Patient-reported quality of life (facial clinimetric evaluation, FaCE), physician-reported facial function (eFACE facial grading scale), and oral commissure excursion were compared preoperatively and postoperatively. SPSS 11.0 software was used to analyze the data. Results: Thirty-seven patients were followed up in one year after surgery. Significant postoperative improvements were demonstrated for commissure excursion with smile (preoperatively: (-1.2±3.1) mm, postoperatively: (6.1±3.5) mm, t=-31.1, P<0.01), ipsilateral FaCE (preoperatively: (29.4±14.1), postoperatively: (57.6±23.4), t=-38.1, P<0.01), eFACE score (Composite score t=-35.8, Static score t=-29.1, Dynamic score t=-41.3,Midface score t=-43.9, all P<0.01), respectively. Conclusion: Masseter nerve-innervated free gracilis muscle transfer is an good option for dynamic smile reanimation in adult patients who have undergone treatment for long-standing facial paralysis.
Adult ; Facial Paralysis/surgery* ; Female ; Gracilis Muscle ; Humans ; Male ; Middle Aged ; Nerve Transfer ; Quality of Life ; Reconstructive Surgical Procedures ; Retrospective Studies ; Smiling

Our previous investigation suggested that faster seventh cervical nerve (C7) regeneration occurs in patients with cerebral injury undergoing contralateral C7 transfer. This finding needed further verification, and the mechanism remained largely unknown. Here, Tinel's test revealed faster C7 regeneration in patients with cerebral injury, which was further confirmed in mice by electrophysiological recordings and histological analysis. Furthermore, we identified an altered systemic inflammatory response that led to the transformation of macrophage polarization as a mechanism underlying the increased nerve regeneration in patients with cerebral injury. In mice, we showed that, as a contributing factor, serum amyloid protein A1 (SAA1) promoted C7 regeneration and interfered with macrophage polarization in vivo. Our results indicate that altered inflammation promotes the regenerative capacity of the C7 nerve by altering macrophage behavior. SAA1 may be a therapeutic target to improve the recovery of injured peripheral nerves.
Animals ; Brachial Plexus ; Brachial Plexus Neuropathies/surgery* ; Humans ; Mice ; Nerve Transfer ; Peripheral Nerves ; Spinal Nerves

Amputees ; Deltoid Muscle/surgery* ; Humans ; Muscle, Skeletal ; Nerve Transfer ; Quality Control ; Upper Extremity/surgery*

The free functional muscle transfer (FFMT) is the surgical procedure aimed at reconstructing defective or deteriorated muscle function by grafting free muscles including blood vessels and nerves. Since the free gracilis transfer in the facial paralysis was introduced in 1976, there have been many studies and clinical applications of the FFMT in various donor and recipient sites in brachial plexus injury, muscle ischemic contracture, muscle defect after tumor resection, congenital muscular deficit, multiple trauma. When the reconstruction of the nerve is delayed for 9 months to 1 year after the brachial plexus injury, voluntary muscle contracture is impossible even after the nerve regeneration by the irreversible degeneration of the muscles. And it is difficult to obtain adequate function even if nerve transfer or nerve transplantation is performed because the distance to be regenerated is too long. In these cases, the FFMT has been improved the functions of the upper limb in flexion or extension of the elbow, fingers. Many good clinical results of the FFMT have been reported, so the FFMT gets much interests and attentions. The essential things for the successful outcome of the surgery are the anatomical knowledge, the skilled surgical technique and the choice of patients who can meet the indications and receive long-term rehabilitation. Recent advances in surgical techniques will result in improved results of the FFMT.
Attention ; Blood Vessels ; Brachial Plexus* ; Contracture ; Elbow ; Facial Paralysis ; Fingers ; Humans ; Ischemic Contracture ; Multiple Trauma ; Muscle, Skeletal ; Muscles ; Nerve Regeneration ; Nerve Transfer ; Rehabilitation ; Tissue Donors ; Transplants ; Upper Extremity

The term ‘Nerve Transfer’ means the transfer of a normal or nearly normal fascicle or nerve branch to an important sensory or motor nerve that has sustained irreparable proximal damage. It is a kind of salvage procedure performed when the proximal part of a peripheral nerve is totally damaged and impossible to be repaired. In case of irreparable preganglionic injury, it is difficult to recovery the nerve function by only nerve graft. In this case, the uninjured nerve around the brachial plexus could be transferred to restore the function of the upper extremities. Previous studies have reported a high recovery rate for the function of the upper limb above the elbow and recent efforts have been made to restore the function of the upper limb below the elbow including hand functions. The purpose of this article is to review the type of nerve transfer to restore upper extremity function, operative technique, outcomes and complication.
Brachial Plexus ; Elbow ; Hand ; Nerve Transfer* ; Peripheral Nerves ; Transplants ; Upper Extremity*

Brachial plexus injuries (BPI) can have devastating effects on upper extremity function, however, treatment in this injuries remains a difficult problem. Several kinds of surgical methods have been used to treat BPI, and nerve repair and nerve grafting have been traditionally used in postganglionic injury of brachial plexus. Because the several studies reported that nerve transfer to restore shoulder and elbow function has yielded superior results to historical reports for nerve grafting in partial BPI, the indication of nerve repair and nerve grafting has been decreased. Nonetheless, nerve repair and nerve grafting is still useful in focal damage in brachial plexus, such as laceration or gunshot wound and postganglionic neuroma in continuity without conduction of nerve action potential. In this paper, we described the basic concept, detailed indication and outcomes of nerve repair or nerve grafting in BPI.
Action Potentials ; Brachial Plexus* ; Elbow ; Lacerations ; Nerve Transfer ; Neuroma ; Shoulder ; Transplants* ; Upper Extremity ; Wounds, Gunshot

PURPOSE: Leber hereditary optic neuropathy (LHON) is one of the most common hereditary optic neuropathies caused by mutations of mitochondrial DNA. Three common mitochondrial mutations causing LHON are m.3460, m.11778, and m.14484. We report a rare mutation of the mitochondrial tRNA (Leu [UUR]) gene (MT-TL1) (m.3268 A > G) in a patient with bilateral optic atrophy. CASE SUMMARY: A 59-year-old female diagnosed with glaucoma 3 years earlier at a community eye clinic presented to our neuro-ophthalmology clinic. On examination, her best corrected visual acuity was 0.4 in the right eye and 0.7 in the left eye, and optic atrophy was noticed in both eyes. Optical coherence tomography revealed retinal nerve fiber layer (RNFL) thinning in both eyes; average RNFL thickness was 52 µm in the right eye and 44 µm in the left eye, but the papillomacular bundle was relatively preserved in both eyes. Goldmann perimetry demonstrated peripheral visual field defects, mostly involving superotemporal visual field in both eyes. Mitochondrial DNA mutation test showed an unusual mutation in MT-TL1 gene seemingly related to this optic neuropathy. CONCLUSIONS: We found a rare mutation (m.3268 A > G) of the mitochondrial DNA in a patient having bilateral optic atrophy, which led to the diagnosis of LHON. There have been previous reports about mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) and infantile myopathy caused by MT-TL1 mutation, but this is the first case of LHON associated with the same mutation. In this case of LHON associated with MT-TL1 mutation, atypical clinical features were observed with a relatively mild phenotype and peripheral visual field defects.
Diagnosis ; DNA, Mitochondrial ; Female ; Glaucoma* ; Humans ; MELAS Syndrome ; Middle Aged ; Muscular Diseases ; Nerve Fibers ; Optic Atrophy ; Optic Atrophy, Hereditary, Leber* ; Optic Nerve Diseases ; Phenotype ; Retinaldehyde ; RNA, Transfer ; Tomography, Optical Coherence ; Visual Acuity ; Visual Field Tests ; Visual Fields

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