The medial tibial stress syndrome is a symptom complex seen in athletes who complain of exercise-induced pain along the distal posterior-medial aspect of the tibia. Intramuscular pressures within the posterior compartments of the leg were measured in 12 patients with this disorder. These pressures were not elevated and therefore this syndrome is a not a compartment syndrome. Available information suggests that the medial tibial stress syndrome most likely represents a periostitis at this location of the leg.

A telephone survey of 75 landfill gas facilities in the U.S.A. was carried out at the end of 1983. Twenty-nine of the sites were operated at the time of the questionaire and eight were under construction, the remainder were in various stages of planning. While most existing sites were in the West more than half of the planned sites were in other parts of the country. While more than half of existing sites upgraded the heat content of the gas two thirds of the plans for new facilities call for direct use of low heat content gas, primarily to generate electricity. Although most landfills in the same survey were owned and operated by public authorities nearly all of the gas facilities (87%) are operated by private firms.

A two-stage project was developed to study the effect of increased venous pressure on blood flow and survival in microvascular free tissue transfers. A rabbit epigastric fasciocutaneous free flap model was used. The blood flow in the rabbit epigastric free flap is 1.07 +/- 0.06 ml/min. The average venous pressure is 8.6 +/- 1.7 cm water. A logarithmic relationship between blood flow and venous pressure was demonstrated, with a statistically significant decrease in blood flow to 20-35% of the control values when the venous pressure rose above 28-30 cm water. This study stands in support of the tolerance by free tissue transfers of pressures below this range. The results further show a positive correlation between increasing venous pressure and free flap failure.

No abstract