Degloving injuries of the abdominal wall.

OBJECTIVE: To stress the local, regional and global impact of degloving injuries of abdominal wall based on which the surgeon can design the management protocol. METHOD: A retrospective series of seven cases who met with high velocity run-over accidents between the year 2002 to 2007. All patients were clinically examined and the findings confirmed radiologically, which guided the management. RESULTS: Out of the seven patients treated, six survived. All patients had open degloving injury of abdominal wall and in different areas of the lower limbs, while three had an additional closed degloving in the back, thighs and gluteal regions. All of them had pelvic fractures of various types. Three patients had peritoneal injury, of whom one had additional diaphragmatic injury. None of them had hollow viscus perforation or injury to solid viscera despite the varied severity of injuries to the abdominal wall, pelvic bone and diaphragm. CONCLUSION: Degloving injuries of the abdominal wall are rarely encountered in our practice. The associated morbidity and mortality are very high. However, the prognosis can be improved by successful revival and rehabilitation of these patients, which is possible by early resuscitation, recognition of all bony and soft tissue injuries, early debridement and coverage.

Synthesis of silver nanoparticles in poly(vinyl alcohol) matrix in solution and thin films through laser irradiation.

Here we communicate our experimental results on the synthesis of silver nanoparticles in solution and thin films using silver nitrate and poly vinyl alcohol (PVA) mixture at different concentrations and different laser irradiations. Detailed studies were carried out by varying pulse width, wavelength, exposure time, and energy of the laser. Formation of nanoparticles was confirmed through color change from transparent to yellow. Irradiated solutions and thin films at different concentrations showed plasmon peak in the absorption spectra. Formation of different sized nanoparticles at different energies with peak shift is observed. Transmission electron microscope (TEM) results confirmed the formation of nanoparticles with size of the particles varying from 2 to 200 nm. Formation of silver nanoparticles with hexagonal and different shapes were observed in particular with 355 nm laser irradiation. Influence of wavelength, pulse width, exposure time, and energy in the synthesis of silver nanoparticles is highlighted. Electron diffraction patten of a single nanoparticle in TEM showed polycrystallinity with cubic nature for the silver nanoparticles prepared. We also compared the linear and nonlinear absorption properties of the freshly prepared nanoparticles with nanoparticles solution left in a shelf for a long period of time.

Control of the polarization properties of the supercontinuum generation in a noncentrosymmetric crystal.

A systematic experimental study on the polarization properties of supercontinuum generation (SCG) in a noncentrosymmetric crystal (KDP) is reported. Our studies show that depolarization of the SCG is dependent on the plane of polarization of incident light as well as on the orientation of the crystal, allowing a better control of the polarization properties.

Functional outcome of extensor carpi radialis longus transfer for finger flexion in posttraumatic flexor muscle loss.

PURPOSE: The purpose of this study was to assess the functional outcome after extensor carpi radialis longus (ECRL) transfer for restoration of finger flexion in patients with flexor muscle loss after direct trauma. METHODS: We evaluated 8 patients who had ECRL transfer between 1995 and 2003. Flexion gained was assessed by measuring the digit-to-palm distance (DPD). The grip strength was compared with that of the opposite normal limb. The average follow-up period was 41 months. We compared the results obtained with other modalities of restoration of finger flexion, namely a pedicled latissimus dorsi muscle transfer or a free functioning muscle transfer (FFMT) using the series available in the literature. RESULTS: Four patients had a good result with a DPD of 0 cm in all fingers and an average grip strength of 65% of the opposite hand. Two patients had an average result with a DPD of 1.5, 2, 1.7, and 1.5 cm for the index, middle, ring, and small fingers, respectively, and an average grip strength of 58%; 2 patients had a poor result with a DPD of 5.0, 5.5, 5.0, and 3.0 cm for the index, middle, ring, and small fingers, respectively, and with an average grip strength of 21% of the opposite hand. CONCLUSIONS: The ECRL transfer yields good results if the intrinsic muscles of the hand are functioning, the extensor compartment is uninjured, and the lower third of the forearm where the tendon junction is performed is relatively unscarred. In such instances the range of movement and grip strength achieved are better than a latissimus dorsi muscle pedicle graft and are comparable with a FFMT. This is achieved earlier than the time taken for reinnervation of FFMT and without the attendant risks for flap failure. The ECRL transfer for finger flexor restoration is a more simple alternative that should be considered when possible.