Biomedical subjects

B Guyuron

Publications and source records attributed to B Guyuron.

94 records · Page 6Linked to original sources

PubMedDate not supplied

Evaluation of stents following septoplasty.

This prospective study was designed to evaluate the immediate postoperative course and long-term efficacy of septal stents. In 20 patients who underwent primary septorhinoplasty, Doyle II silicone stents were inserted bilaterally parallel to the septum. The stents were removed after an average of 3.3 days. A hollow tube was designed into this particular stent in an attempt to minimize patients discomfort from nasal airway obstruction. Subjective ratings of airway improvement were very similar for patients whose septums were supported with nasal stents and for those patients from our 1989 study whose noses were treated with nasal packing. However, the number of patients who complained about discomfort was substantially higher in the stent group, 60% (12 of 20), compared with the nasal packing group, 22% (5 of 23 patients) (p < 0.05). The percentage of partial residual or recurrent septal deviation was also slightly higher in the stent group, 25% (5 of 20), than in the packing group, 13% (3 of 23 patients), but this was not statistically significant (p > 0.50). The alar base incision was partially dehisced during removal of the stent in one patient, in spite of a routine reduction in the width of the splint.

Adolescent↗

PubMedDate not supplied

Practical classification of chin deformities.

A visually pleasing chin is an important component of facial harmony. This study was undertaken to introduce a practical classification of chin dysmorphology, which can be used to guide the surgeon toward the appropriate surgical approach to chin repair. Analysis of life-size photography, based on standard anthropometric measurements, was completed on 2,879 patients from 1981 to 1991. Six hundred eighty-four patients were noted to have normal occlusion with some form of chin deformity. Analysis of this group of patients identified seven categories of chin dysmorphism: Class I, macrogenia (n = 170, 24.9%); Class II, microgenia (n = 435, 63.6%); Class III, combination of macrogenia in one direction and microgenia in the other direction (n = 54, 7.9%); Class IV, asymmetry (n = 4, 0.6%); Class V, soft tissue ptosis ("witch's chin") (n = 13, 1.9%); Class VI, pseudomacrogenia (normal skeletal symphysis menti with excess soft tissue covering) (n = 5, 0.73%); and Class VII, pseudomicrogenia (long-face deformity producing clockwise rotation of the normal mandible) (n = 3, 0.4%). Having diagnosed the dysmorphism, logical surgical recommendations for lower face improvement were postulated. Only patients with Class II chin deformity can be corrected with augmentation. Classes I, III, and IV require an osteotomy of the chin. Classes V and VI benefit from soft tissue correction. Class VII deformity can be corrected with a maxillary osteotomy.

Adolescent↗

PubMedDate not supplied

Patient satisfaction following rhinoplasty.

This retrospect study was conducted to evaluate patients satisfaction following rhinoplasty. Of the 1,062 patients who had undergone rhinoplasty and received a questionnaire, there were 468 respondents. They rated satisfaction with aesthetic and functional results of the surgery. Four groups were created: Group I comprised all the respondents: 468 patients of which there were 381 (81.4%) females and 87 (18.6%) males; 6.2% of this group was dissatisfied. Group II [373 patients: 301 (80.7%) female and 72 (19.3%) male] was composed of patients who underwent a primary rhinoplasty by the lead author, with or without revision of which 7.5% was not satisfied. Group III [95 patients: 80 (84.2%) female and 15 (15.8%) male] comprised those who underwent the initial rhinoplasty by another surgeon and the secondary procedure by the lead author. The surgery failed to satisfy only 1.1% of this group. Group IV [86 patients: 78 (90.7%) female and 8 (9.3%) male male] underwent initial surgery by the lead author and then required revision surgery. This group exhibited the highest dissatisfaction level (13.6%). This article analyzes the results of the questionnaire in detail. In summary, the percentage of dissatisfied patients in the total population was higher among male patients (12.8%) than among female patients (4.6%).

Adolescent↗

PubMedDate not supplied

Yucatan pig: an optimal hairless model for a true random cutaneous flap.

Porcine models have been used extensively for skin flap research because of the established similarity between the cutaneous blood supply of the swine and humans. The Yucatan minipig provides an excellent model for researching the properties of random cutaneous flaps, offering several advantages over other breeds of swine. In this study, a total of 67 random cutaneous dorsal flank flaps measuring 4 x 14 cm were raised on nine Yucatan minipigs. The mean survival length (10.03 +/- 1.60 cm) of the nondelayed flaps was greater than others reported in the literature. The well-defined plane between the subcutaneous tissue and the panniculus carnosus facilitated flap elevation consistently above the level of the panniculus carnosus thereby ensuring the creation of a true random cutaneous flap. Furthermore, the hairless nature of the skin, particularly beneficial in studying chemical peels, permits easy visualization and monitoring of any external skin changes. These advantages make the Yucatan minipig a more desirable alternative to other breeds of swine for use in skin flap research.

Animals↗