The Effects of Septorhinoplasty Techniques and Poly-P-Dioxanone Plate Use on Maxillofacial Growth: An Experimental Study.

ABSTRACT: Since the septum plays a key role in maxillofacial growth, the effect of septorhinoplasty maneuvers and the use of poly-p-dioxanone plate during growth on maxillofacial growth was investigated in our study. Thirty-three New Zealand rabbits each with an age of 8 weeks were included in the study. Maxillofacial computed tomography was performed on all 8-weeks old rabbits. Then, the rabbits were divided into 5 groups randomly. No intervention was done on the rabbits in group 1. Nasal dorsum of the rabbits in the 2nd group were opened, and the mucosae were bilaterally elevated. In the third group underwent limited cartilage resection by preserving the nasal dorsum. Removed cartilage was crushed and placed back between the mucoperichondrial flaps for the rabbits in the 4th group. Crushed cartilage with Poly-P-Dioxanone plate was used for the rabbits in the 5th Group. Maxillofacial computed tomography was performed at the end of the 20th week and growth parameters were investigated. When the group 2 was compared with the control group, the nasal bone length was observed to be significantly shorter (P < 0.05). Group 5 compared with group 4, incisive bone volume remained significantly low (P < 0.05) and malocclusion developed. Nasal bone length was affected negatively in the group that underwent osteotomy and mucosa elevation. Although positive results related to poly-p-dioxanone plate use have been reported for adults, incisive bone development retarded in noses that had not yet reached adult size in our study and the maxillofacial development was affected adversely.

Comparison of subcutaneous central venous port via jugular and subclavian access in 347 patients at a single center.

The purpose of the present study was to examine whether patency times, including complications of subcutaneous venous chest port insertion using ultrasonography (US) guidance, differ between jugular and subclavian venous access. Between December 2008 and July 2010, subcutaneous venous chest ports were placed in 347 patients by an experienced team. All single-lumen port catheters were placed into jugular and subclavian veins under US and fluoroscopy guidance. Patency times and complication rates of ports via these routes were compared and the variables were age, gender, access, site of malignancy and coagulation parameters. The success of the jugular and subclavian groups was compared by univariate Kaplan-Meier survival analysis and the multivariable Cox regression test. A total of 15 patients underwent port removal due to complications. As a rate per 100 catheter days, ports were explanted in 7 (0.0092) due to thrombosis, 4 (0.0053) for catheter malposition, one each (0.0013) of port reservoir flip-over, bleeding, port pocket infection, skin necrosis and incision dehiscence, for a total of 15 patients (0.0197). Patency times were not different in the jugular and subclavian veins. Factors were not significant, with the exception of platelet count. There was no significant difference in patency times, including complications, between jugular vein access and subclavian vein access using US. This should be considered when selecting the access method.