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Biomedical subjects

W X Guan

Publications and source records attributed to W X Guan.

14 recordsLinked to original sources
PubMed2000

[Functional evaluation of electrical-injury nerve using somatosensory evoked potential technique].

OBJECTIVE: To investigate the characteristics and the pathologic classification of electrical-injury nerve using somatosensory evoked potential(SEP) technique. METHODS: SEP were detected and evaluated in 12 cases with electrical-injury nerve during operation, electrical stimulation was commenced from distal side of nerve where the structure of nerve looks normal under operating microscope, up to proximal side until evoking out a stable SEP predeterminate virtual value. Pathological examination and the following functional evaluation were compared with the values of SEP. RESULTS: At the site of nerve looking normal under operating microscope, perineurium appears normal or slightly thicken. But there are obvious fibrosis and fibrotic proliferation between fascicular and intrafascicular. Vessel plexus is not seen. At SEP stabilizely evoked site, nervous construction is normal, there are visible interfascicular vessel plexus and connective tissue appears loose. Comparing SEP values with pathological section, amplitude and latency of SEP is positively correlative with the quality of nerve. Eight cases repaired with SEP technique to select the anastomosis site for nerve transplantation were followed up, two-point discrimination reached grade III (America hand surgery association criterion) within 62.5% cases. CONCLUSION: SEP technique is valuable method for functional evaluation of electrical- injury nerve which has a complicated pathology. The pathology of electrical-injury nerve can be classified into 4 types, type A: fibrosis of nerve; type B: nerve looking normal under operation microscope, perineurium appears thicken, and there are obvious fibrosis and fibrotic proliferation between fascicular and intrafascicular, vessel plexus is rarely to see; type C: nerve looks normal, lymphocyte infiltration exists and it is obvious that there are many physalis-like, retrogressive construction in the section; type D: nervous construction is normal, there are visible interfascicular vessel plexus, and connective tissue appears loose, SEP always can be stably evoked.

Adolescent↗
PubMed2000

[Clinical application of the medial fasciocutaneous flap of arm].

OBJECTIVE: To study the clinical application of the medial arm fasciocutaneous flap based on the medial septocutaneous branches of the brachial vessel. METHODS: Since 1994, the medial arm fasciocutaneous flap based on the medial septocutaneous branches of the branchial vessel has been used to cure scar contracture of axillary and elbow joint, radiated ulcer of the chest wall. Eighteen clinical cases were reported. Among them, there were 14 males and 4 females, aged from 6 to 48 years old. The flaps, of which 3 were proximally based and 15 distally based, were designed 23 cm x 11 cm as maximal size and 10 cm x 6 cm as minimal size. RESULTS: All the flaps survived and the excellent function and cosmetic result were achieved. CONCLUSION: The medial arm fasciocutaneous flap is thin, soft and relatively hairless, so it is suitable for repairing the soft tissue defect of the axillary or elbow joint. There are consistently present perforators at both ends that allow one to rotate long flaps around pivoting points immediate to the areas needing coverage. Moreover, this flap is characterized by the simplicity of the surgical techniques and circulatory reliability.

Adolescent↗
PubMed1993

Microsurgical replantation of the avulsed scalp: report of six cases.

This article reports the successful microsurgical replantation of six scalps avulsed for over 3 to 11 hr, after trauma and before repair, including five total and one partial avulsion. The authors believe that one key to successful replantation is effective vessel anastomoses. In the reported series, three scalps were reconstructed with two superficial temporal vessels and in five cases, with a 1:1 ratio between arteries and veins. The partially avulsed scalp was replanted successfully with only one artery and one vein. The management of postoperative complications is discussed.

Accidents, Occupational↗
PubMed1988

Reconstruction of postburn female breast deformity.

Postburn breast deformity is a sequelae of severe scar contraction of the burned chest. During the past four years, 6 female patients with such a deformity required reconstruction, and the surgery was performed in our department. Three different types of breast reconstruction were undertaken, each one achieving a satisfactory aesthetic result.

Adolescent↗
PubMed1985

Reversed island forearm fascial flap in hand surgery.

We present a technique using a reversed island forearm fascial flap based on the distal portion of the radial artery and veins, with a skin graft on top, to repair a soft tissue defect of the hand. Good results were obtained in a total of 18 operations in 17 postburn cases. The operation can be completed in one stage even when it involves the excision of scar tissue, correction of the secondary deformities of deep structures, and repair of the soft tissue defect of the hand. The advantages and disadvantages of the method and key points of the technique are discussed.

Adult↗
PubMed1985

A new method for treating postburn talipes equinovarus.

Postburn talipes equinovarus has long been a challenging problem for plastic surgeons, who usually replace the overlying scar in multistaged flap or tube transfer operations before lengthening the shortened Achilles tendon. This always requires long hospitalization and causes much discomfort for the patient because of postural immobilization. In 1975, I designed a new and simple procedure by Z-lengthening the scar tissue and the Achilles tendon as a whole in one stage. To date, the operative result in 10 cases has been excellent, without failure or recurrence.

Adult↗