Search Results (2)

Background/Objectives: Mechanical compression of the median nerve is believed to be responsible for idiopathic carpal tunnel syndrome (CTS) due to fibrosis of the subsynovial connective tissue (SSCT). Vascular consequences have also been observed in structures of the carpal tunnel, raising speculation regarding the role of factors such as ischemia and edema in CTS pathology. Methods: We performed a mega-analysis from our database of over 10 years of studies. Mixed-effects models were used to address the disconnect between mechanical and vascular influences on CTS; the effects of biomechanical factors and CTS status were evaluated on carpal tunnel tissue mechanics and blood flow. Altered blood flow was also induced during tissue motion to draw inferences regarding the cyclical relationship between tissue mechanics and fluid flow changes on CTS pathology. Results: Greater movement speed and flexed wrist postures were found to contribute to greater shear strain. Flexed wrist postures and greater fingertip force were found to increase median nerve blood flow. Greater CTS severity was associated with lower median nerve blood flow. Finally, brachial blood flow restriction as a surrogate for elevated carpal tunnel pressure was found to alter tissue motion and increase carpal tunnel tissue shear strain. Conclusions: Finger movement speed, force application, wrist posture, and altered fluid flow in the carpal tunnel contribute to changes in outcomes associated with the development of CTS. The mechanistic findings from this paper should be incorporated into future research to update the damage model for CTS pathology. Full article

Cyclic edema is a clinical condition in women that leads to fluid retention in the orthostatic position. The aim of the present study was to evaluate the prevalence of idiopathic cyclic edema in women with lower limb lymphedema. The prevalence of idiopathic cyclic edema was evaluated in a retrospective study of 100 consecutive female patients submitted to leg lymphedema treatment at the Clínica Godoy. The diagnosis of lymphedema was clinical, based on patient history and a physical examination. Patients with clinical stage II lymphedema were included in the study with those in stages I and III being excluded. The diagnosis of idiopathic cyclic edema was based on the patient’s history and fluid retention of more than one kilogram between 7:00 a.m. and 5:00 p.m. Clinical signs of this disease include difficulty removing rings in the morning that becomes easier during the course of the day, waking up with a swollen face, and abdominal discomfort during the day. After diagnosing cyclic edema, a therapeutic test was performed using aminaphtone or calcium dobesilate with which fluid retention was reduced to less than 300 g during the same period. The patients were instructed to drink liquids only when they were thirsty. Full article