P-2-06-23
Usefulness of magnetic resonance relaxation times of skeletal muscles lot the monitoring of peripheral nerve injury
Yoshihiro Hayashi, Takaaki Ikata, Shinjiro Takata (Tokushima University, Tokushima, Japan)
Keiko Koga, Takayuki Sogabe, Makoto Ishikawa (Otsuka Pharmaceutical Co., Ltd. Tokushima, Japan)
The changes seen in the T1 and T2 relaxation times, fat/water ratio and blood volume of rat hindlimb muscles following peripheral nerve injury for 2, 4, 6 weeks and recovery for 6 weeks after 2 weeks nerve injury were studied by magnetic resonance spectroscopy. Also, water content of muscles were determined by dehydration. Peripheral nerve injury was induced by sciatic nerve compression with silastic tube and neural recovery was induced by detachment of this tube. Peripheral nerve injury led to longer T2 values against sham operation control. But the significant changes in T2 by the prolongation of nerve injury were not observed. The neural recovery for 6 weeks after 2 weeks nerve injury resulted in return to normal value of T2. On the other hand, the significant changes in T1 value, water content, and fat/water ratio were not seen by peripheral nerve injury. The time course of changes in blood volume was similar pattern of T2 value and strongly correlated with the blood volume (r^2=0.94). Thus, the changes of T2 values in skeletal muscles were useful for monitoring during neural recovery stage and not useful for doing the period of the peripheral nerve injury and suggested to be effected by the changes of blood volume in skeletal muscles.
P-2-06-24
Femoral neuropathy like complication of hysterectomy.
L. C. Dominguez. (Guanajuato University, Leon, Mexico).
We report 14 cases of Femoral nerve palsy following to abdominal hysterectomy like complication. We found predisponent factors were: lower weight than ideal weight in 100% of cases. All patients presented age mean 39.2 years (range 35-42); all of them presented a real weight between 11.89 and 6.99 lower than ideal calculated weight, Student t=1.854 and p 0.05. There was 6 left and 8 right lesions; this were catalogated like neuropraxy because all of them were recuperated; evolution time showed range of 8 to 14 weeks; An other predisponent factor was Pfannenstiel incition on this thin patients, the Sullivan O'connors retractors were considerated the unchain factor because the valves are - long in relation to thinness of patients.
Conclusion: In all patients with weight lower than ideal weight the fisician must explain the risk to avoid legal problems of demands and must be careful at surgery time using more shorter valves of the re- tractor and to try to make a more high incition.
In literature we only found three articles in 20 years review, that means two things, or this pathology is not frequent or like yatrogeny is not reported.
