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Biomedical subjects

Kaneshige Satoh

Publications and source records attributed to Kaneshige Satoh.

At least 19 recordsLinked to original sources

Hemostasis by means of a cautery knife equipped with an air spray for burns over a large area.

In operations in which debridement is performed over a large area (e.g., surgery for whole-body burns), it is necessary to keep the length of the operation short and the amount of blood loss as small as possible to minimize stress to the patient's body. In this study, we developed a cautery knife to which an air spray is attached for surgical procedures in which debridement is performed as treatment for burns over a large area. We have demonstrated herein that this device is very effective for reducing both blood loss and the duration of surgery as well as for simplifying the achievement of hemostasis.

Air↗

Clinical application of distraction osteogenesis for traumatic maxillofacial deformities.

Treatment including occlusal function is important for maxillofacial fractures. Because distraction osteogenesis is now used frequently for the treatment of various types of congenital maxillary hypoplasia, the authors applied this technique to six cases of traumatic maxillofacial deformity caused by old maxillofacial fractures. Several kinds of devices were used for the various deformities associated with severe malocclusion, resulting in extension of both bone and soft tissues. In each case, favorable facial aesthetics and occlusion were achieved. Distraction osteogenesis also appears to be an extremely effective method for repair of traumatic maxillofacial deformities.

Adolescent↗

Simultaneous hybrid of maxillary Le Fort I halo distraction and mandibular set-back for patients with severe cleft jaw deformity.

One of the surgical tactics and retrospective chart review of clinical cases are described for severe maxillo-mandibular discrepancy. The recently developed Le Fort I Halo distraction combined with mandibular sagittal splitting osteotomy is initially carried out simultaneously. Materials include six adult patients revealing severe jaw deformity with mandibular prognathism somehow ranging from 17-19 years of age. The required adjustment of the maxillo-mandibular discrepancy ranged from 14-23 mm to obtain the preferred occlusion. The simultaneous combination of over 10-mm maxillary Le Fort I Halo distraction with mandibular set-back secured rigidly by sagittal splitting was accomplished. The amount of mandibular set-back ranged from 4-6 mm. The amount of maxillary Le Fort I halo distraction ranged from 10-17 mm (Table I). The retention period of the halo brace was 21-22 days. In addition, the Delair type of face mask was used for 3-4 months as a night splint for consolidation after removal of the halo brace. Satisfactory maxillary distraction and mandibular set-back as planned preoperatively was obtained in all six cases. No particular postoperative complications were noticed. Compared with standard Le Fort I advancement for cleft patients, more advancement can be obtained easily with halo distration, particularly in cases where a large amount of advancement > 10 mm is required. This combination is worthwhile for a severe cleft jaw deformity, and is an alternative for standard double jaw osteotomy.

Adolescent↗

An unusual traumatic fracture of the mandibular symphysis resembling horizontal osteotomy for genioplasty.

The authors report a rare case of mandibular fracture caused by a flying object, discuss the mechanism of the fracture, and review the literature. The patient was a 40-year-old male soldier in the Self Defense Force (SDF). During a mock battle of the SDF Agency, a shell splinter penetrated his mentum and caused a fracture of the mandibular symphysis that resembled horizontal osteotomy for genioplasty. A horizontal fracture of the mandibular symphysis is very rare, and on clinical inspection, the authors found the general course of the clinical fracture line coincided with the weakest portion of the mandible. A powerful blast can cause an object to become airborne and injure persons in the vicinity, as did the metallic fragments that caused the mandibular fracture in patient reported here. Thus, when examining victims of such traumas, the possibility that a foreign object might have penetrated the body should be kept in mind. A thorough inspection of injuries resulting from explosions is mandatory.

Adult↗

A reflectable case of obstructive sleep apnea in an infant with Crouzon syndrome.

Obstructive sleep apnea has recently drawn attention as a cause of sudden death among infants. Life-threatening obstruction of the upper airway is encountered in patients with syndromic craniosynostosis. Early definitive management of obstructive sleep apnea can conquer this critical situation. Although early tracheostomy can solve the problem, successful early midfacial distraction has been reported. In this report, a reflectable case of sudden death caused by a severe obstructive sleep apnea attack at home just before the midfacial distraction, during the waiting period for the surgery of midfacial distraction, is described. The authors stress the importance of preoperative care of the upper airway and the early definitive treatment using distraction osteogenesis for midfacial hypoplasia in infantile syndromic craniosynostosis.

Craniofacial Dysostosis↗

Hybrid of distraction osteogenesis unilateral frontal distraction and supraorbital reshaping in correction of unilateral coronal synostosis.

Unicoronal synostotic plagiocephaly is routinely treated by intracranial wide frontal and bilateral supraorbital reshaping. Recent advancement of distraction osteogenesis in craniofacial surgery has extended to patients with craniosynostosis. Although a controversy remains between conventional osteotomy and reshaping and application of the distraction technique in surgical treatment of craniosynostosis, there have been several positive clinical reports on distraction techniques for nonsyndromic and syndromic craniosynostosis. Unicoronal distraction applied successfully to a case of frontal plagiocephaly has been described. The authors report a procedure: hybrid of unilateral frontal distraction and supraorbital reshaping on the affected side for frontal synostotic plagiocephaly. This procedure was conducted on four typical unicoronal synostotic plagiocephaly cases (patient age range, 9-14 months; all patients female) with successful results. No particular complications were encountered in any of the four cases with a follow-up period that ranged from 18 to 53 months.

Craniosynostoses↗

Direct skeletal traction for Le Fort I halo distraction replacing an intraoral dental splint and connecting traction hook.

To obviate dental inconveniences after Le Fort I halo distraction using an intraoral dental splint and connecting traction hook, the authors initiated direct skeletal traction using an traction wire at the parapyriformis buttress area. Halo distraction using this procedure was conducted for 11 cleft lip and palate patients (age range, 13-21 years; 6 females and 5 males). Distraction amount ranged from 11 to 15 mm. A satisfactory occlusion was obtained in all patients. All 11 patients complained of pain during the distraction period, but it was controlled by regular oral intake of the usual amount of analgesics. No other particular complications were encountered during the postoperative follow-up of 8 to 18 months. This form of direct skeletal traction proves effective for Le Fort I halo distraction.

Adolescent↗

Tensor fasciae latae perforator flap.

The tensor fasciae latae perforator flap and a new technique, named microdissection, for one-stage accurate formation of a thin flap were presented. Microdissection enables the perforator in the adipose tissue to be used as a lengthened pedicle, and the flap can be transferred without adding and reducing excess fat tissue to the recipient and donor sites. This microdissected thin tensor fasciae latae perforator flap can be used conveniently in many aspects of reconstructive surgery, especially in cases of severe bum scar contracture of the extremities.

Adult↗

Three-dimensional cranial expansion using distraction osteogenesis for oxycephaly.

Oxycephaly is associated with raised intracranial pressure as a result of the fusion of multiple cranial sutures. We have performed an effective and less invasive cranial expansion by means of three-dimensional cranial distraction for the treatment of oxycephaly with suspicion of increased intracranial pressure. We describe two oxycephaly cases and the surgical technique of three-dimensional cranial expansion using distraction osteogenesis.

Absorbable Implants↗

Dual midfacial distraction osteogenesis: Le Fort III minus I and Le Fort I for syndromic craniosynostosis.

Midfacial hypoplasia has been corrected by Le Fort III or monobloc forward advancement in one stage in syndromic craniosynostosis, but recently developed distraction osteogenesis has been in use. Whereas the amount of forward mobilization in Le Fort III conventional osteotomy is determined by the preplanned fabricated interdental splint, that in Le Fort III distraction is determined by the positions of the inferior orbital rim, malar complex, and nose. Therefore, the forward mobilization of the upper part of the midface may sometimes be insufficient when one focuses on the final occlusion, and the occlusion might not be satisfied when the forward mobilization is sufficient. Correction of the midfacial hypoplasia should be considered differently in the upper and lower portions of the midface. The upper portion contains the inferior orbit and nose, and the lower portion contains the occlusal structure of the maxillary dentoalveolar portion with the mandible. Separating the midface into two portions and conducting the distraction osteogenesis in both portions separately in different amounts and vectors of distraction is described in this article. Although distraction of the upper portion of the midface can be conducted in one direction with an internal device, distraction of the lower portion of the midface is preferred for conduction by a controllable device because of the need to obtain the preferred occlusion. To obtain better functional and aesthetic results in midfacial distraction in adults and adolescents with syndromic craniosynostosis, dual Le Fort III minus I and Le Fort I midfacial distraction osteogenesis was performed in four cases (in two patients with Crouzon syndrome and in two patients with Apert syndrome). Two females and two males are described (age range, 13 to 26 years). An internal device was used for the upper portion of the midface and an external device was used for the lower portion. The amount of distraction ranged from 14 to 21 mm in the upper portion of the midface and from 11 to 18 mm in the lower portion. No particular complications were noticed over a follow-up period of 10 to 38 months (average follow-up, 19.8 months).

Adolescent↗

Maxillo-mandibular distraction osteogenesis for hemifacial microsomia in children.

To obviate or lessen the long period of use of orthodontic appliances after distraction for hemifacial microsomia in the mixed dentition patients, simultaneous maxillo-mandibular distraction osteogenesis has been performed in 10 patients aged 7 to 12 years with hemifacial microsomia. In these patients, there were two cases of type I, five cases of type IIa, and three cases of type IIb. A uniplanar internal distraction device was used in all cases. After maxillary Le Fort I osteotomy and mandibular ramus osteotomy, a uniplanar internal distraction device was attached to the mandible. On days 5 to 6 after surgery, distraction of 1 mm per day was started. Rigid intermaxillary fixation (IMF) using soft wires was performed at the distraction and was retained for 1 hour. Except for this period, rigid IMF was released. Distraction length ranged from 10 to 21 mm. After the distraction, a slight lateral crossbite in one case and a slight occlusal change in two cases, which did not necessitate the particular orthodontic treatment, were noted. Postoperative follow-up ranged from 16 to 40 months. The postoperative clinical course was uneventful thereafter. Maxillary growth impairment after the osteotomy has been obscure because of the short postoperative period. This procedure is effective for obviating or lessening the long duration of use of orthodontic appliances in the mixed dentition period of 7 to 14 years of hemifacial microsomia.

Child↗

Le Fort III distraction osteogenesis of midface-retrusion in a case of Hajdu Cheny syndrome.

Le Fort III maxillary distraction osteogenesis using the RED system and advancement genioplasty was successfully performed for the midfacial retrusion and to eliminate severe snoring during sleep in a rare case of Hajdu Cheny syndrome. This syndrome is characterized by slowly progressive systemic osseous dysplasia, exhibiting craniofacial disfigurements and other skeletal deformity, but no description is found in a plastic surgical treatment up to now. A rare entity of this syndrome is also presented.

Adolescent↗