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Biomedical subjects

Yu Maruyama

Publications and source records attributed to Yu Maruyama.

6 recordsLinked to original sources
PubMed2007

Medial canthal reconstruction with glabellar combined Rintala flaps.

BACKGROUND: In medial canthal reconstruction, the continuity of color and texture and the reproduction of natural external appearance are required, and reconstruction with a flap adjacent to the defect is frequently performed as the first choice. The authors have performed reconstruction with a glabellar flap combined with a Rintala flap in five patients. METHODS: A glabellar flap, which is rectangular according to the unit principle, was elevated, and after thinning and trimming to the defect shape, was transferred to the medial canthal defect. The donor site of the glabellar flap was closed with a Rintala flap. RESULTS: Reconstruction by means of this procedure was performed in five patients with defects after resection of medial canthal basal cell carcinoma. In one patient with extension of the defect to the upper and lower eyelids, the tip of the glabellar flap was divided into two portions and transferred to the defective site. No recurrence was observed in any patient, and satisfactory results including aesthetic results were obtained in all patients. CONCLUSIONS: This technique can be performed readily and is applicable to the reconstruction of relatively large defects and is also aesthetically excellent because of a postoperative suture line that is consistent with the topographic curve. This technique may be useful for medial canthal reconstruction.

Aged, 80 and over↗
PubMed2006

Dorsal metacarpal adipofascial flaps for palmar finger and hand reconstruction.

Palmar finger and hand soft tissue reconstruction using a dorsal metacarpal adipofascial flap as well as using a split-thickness skin graft obtained from a nonweight-bearing area of the sole is reported. Two cases of posttraumatic palmar hand scar contracture, 1 case of postburn palmar hand scar contracture, and 1 case of excisional palmar finger defect were repaired using this operation. Excellent results were obtained in all cases without any complications. This procedure is thought to be an effective method having many advantages and bringing about satisfactory results esthetically as well.

Cicatrix↗
PubMed2005

Neurovascularized free short head of the biceps femoris muscle transfer for one-stage reanimation of facial paralysis.

The single-stage technique for cross-face reanimation of the paralyzed face without nerve graft is an improvement over the two-stage procedure because it results in early reinnervation of the transferred muscle and shortens the period of rehabilitation. On the basis of an anatomic investigation, the short head of the biceps femoris muscle with attached lateral intermuscular septum of the thigh was identified as a new candidate for microneurovascular free muscle transfer. The authors performed one-stage transfer of the short head of the biceps femoris muscle with a long motor nerve for reanimation of established facial paralysis in seven patients. The dominant nutrient vessels of the short head were the profunda perforators (second or third) in six patients and the direct branches from the popliteal vessels in one patient. The recipient vessels were the facial vessels in all cases. The length of the motor nerve of the short head ranged from 10 to 16 cm, and it was sutured directly to several zygomatic and buccal branches of the contralateral facial nerve in six patients. One patient required an interpositional nerve graft of 3 cm to reach the suitable facial nerve branches on the intact side. The period required for initial voluntary movement of the transferred muscles ranged from 4 to 10 months after the procedures. The period of postoperative follow-up ranged from 5 to 42 months. Transfer of the vascularized innervated short head of the biceps femoris muscle is thought to be an alternative for one-stage reconstruction of the paralyzed face because of the reliable vascular anatomy of the muscle and because it allows two teams to operate together without the need to reposition the patient. The nerve to the short head of the biceps femoris enters the side opposite the vascular pedicle of the muscle belly, and this unique relationship between the vascular pedicle and the motor nerve is anatomically suitable for one-stage reconstruction of the paralyzed face. As much as to 16 cm of the nerve can be harvested, and the nerve is long enough to reach the contralateral intact facial nerve in almost all cases. The lateral intermuscular septum, which is attached to the short head, provides "anchor/suture-bearing" tissue, allowing reliable fixations to the zygoma and the upper and lower lips to be achieved. In addition, the scar and deformity of the donor site are acceptable, and loss of this muscle does not result in donor-site dysfunction.

Adult↗
PubMed2004

Nasal augmentation using calcium phosphate cement.

This report describes a simple technique for augmentation rhinoplasty using calcium phosphate cement paste for postoperative and posttraumatic nasal deformities. This biomaterial was used to correct traumatic nasal bone deformity in one patient and for augmentation rhinoplasty after removal of the nasal implant in two patients. These patients were followed for a minimum 6 months and a maximum of 26 months. The esthetic results were satisfactory with no complication. Calcium phosphate cement consisting of alpha-tricalcium phosphate, dicalcium phosphate dibasic, and tetracalcium phosphate monoxide has been used for bone replacement and augmentation because of its good biocompatibility and osteoconductivity. This technique is easy and safe. It seems to be a suitable material for augmentation rhinoplasty in the Orient. Its long-term safety and reliability require proof with longer follow-up periods, however.

Adult↗