Ibrahim Sari

Comparison of microsuturing to the use of tissue adhesives in anastomosing sciatic nerve cuts in rats

The purpose of this study was to investigate and to compare the effects of microsuturing to that of tissue adhesives (Tisseel®) on the healing of anastomosing peripheral nerve incisions.Forty-five Wistar-Albino rats were placed in special cages and separated into three groups (n = 15). In the control group, biliteral sciatic nerves were explored but no incision was made. In the first experimental group, bilateral sciatic nerves were incised and end-to-end anastomosing was performed by microsuturing the epineurium. In the second experimental group, tissue adhesive (Tisseel®) was used alone in anastomosing the sciatic nerve cuts. Assessments of the healing processes were demonstrated by 1. electromyography (EMG), 2. measuring the electrical responses of the anastomosed nerves after electrical stimuli, 3. histopathological examination.Statistical analysis of the EMG findings showed that the Tisseel group was the closest in the healing process to the control group. After applying electrical stimuli to the dissected nerves, the resistance value of the Tisseel group was nearest to those of the control group. The histopathological examinations showed highly degenerative nervebundles and prominent foreign body granuloma at the anastomosed sites of the microsutured group. The granulomatous inflammation was observed to be much less in the Tisseel group.We conclude that the healing effect of Tisseel was found to be superior to that of microsmuring as demonstrated by the findings of EMG, electrical responses of the anastomosed nerves, and histopathological examination.

Diffuse lipomatosis of thyroid gland

A case of diffuse lipomatosis of the thyroid gland is presented. Previously documented cases of this rare disorder are reviewed. Diffuse lipomatosis of the thyroid, amyloid goiter with adipose tissue, and the relationship between lipomatosis and adenolipoma are discussed.

Effect of granulocyte-macrophage colony-stimulating factor on treatment of acute osteomyelitis

Abstract Granulocyte-macrophage colony-stimulating factor (GM-CSF) is a cytokine that affects the various developmental steps of hematopoietic cells and enhances the phagocytic activity of these cells. The effect of GM-CSF on acute osteomyelitis, developed in rats, was investigated. For this purpose, osteomyelitis was firstly developed through the direct inoculation of Staphylococcus aureus into rat tibial metaphysis. Twenty-four rats in which diagnosis of osteomyelitis was histopathologically established were divided into two groups. Antibiotic only was given to the first group, and antibiotic as well as GM-CSF to the second group. Rats were followed up for 3 months with plain radiographs and scintigraphic methods using 67Ga-citrate. Material obtained from the rats that had been killed at the end of the 3rd month were histopathologically investigated. One rat in the first group died. In another rat, chronic osteomyelitis developed and fracture was observed. In 12 rats of the second group, physical examination, plain radiographs, and histopathologic findings were normal. In scintigraphic studies with 67Ga-citrate, when the pre- and posttreatment values of the same groups were evaluated by the Mann-Whitney U-test, the mean values at 48 h after treatment were found to be significant (P < 0.05), indicating a decrease in the 2nd group (experimental group). In conclusion, the antibiotics were effective in the elimination of infection only together with neutrophils. In this manner, infections may be eliminated by strengthening the host’s defense mechanism as well as by administering antibiotics. We believe that an adequate number of long-term studies will shed light on this issue. Besides we consider that this factor will be more important in the study of chronic osteomyelitis.