Incised wound margins caused by steel blades. Scanning electron microscopy to determine wound direction

The aim of this paper has been to check the diagnostic ability of Scanning Electron Microscopy (S.E.M.) to determine wound direction. We have studied incised wound margins caused by steel blades in human skin samples from cadavers by S.E.M. It was found that a lateral accessory tail existed in 65% of the entrance edges. This finding was recorded in all the cases when wound direction was perpendicular to Lancer's lines of the skin area in which the wound was located. No similar finding in the exit tails was noticed. The depth and length of the wound margins was less accurate an index of the wound direction than a lateral accessory tail. We think that this finding could be useful in determining the entrance margin in incised wounds.     

The Mexican State and democracy: The ambiguities of corporatism

The Author thanks Arnaldo Córdova, Guillermo O'Donnell, Ray Morrow, Arturo Sáenz Ferral, Daniel Schugurensky and Arthur Vidich for their valuable comments to previous versions of this article.     

The use of hybrid isoelectric focusing for the detection of polymorphic proteins in blood stains

alpha1-Antitrypsin (Pi), transferrin (Tf) and orosomucoid (ORM) were determined in bloodstain extracts by isoelectric focusing (IEF) with carrier ampholytes (CA) and also with a mixture of immobilines (HIEF). HIEF yields superior results from proteins typing in bloodstain extracts, since phenotypes are better distinguished and the bands are straighter and sharper. Also the sensitivity of HIEF is similar to IEF with CA.     

Diagnostic postmortem angiography of fatal splenic artery haemorrhage

The site of fatal haemorrhage from the splenic artery, caused in one case by a ruptured aneurysm and in another case by an intracystic haemorrhage of a postoperative pancreatic pseudocyst, was revealed by postmortem angiography. Radiopaque silicone rubber vulcanizing at room temperature was used as contrast medium. In the latter case, the dissection was seriously hampered by tight postoperative intestinal adhesions following four abdominal operations to control bleeding into the gastrointestinal tract. The results indicate the usefulness of postmortem angiography with contrast medium vulcanizing at room temperature for postmortem diagnosis of rare causes of gastrointestinal haemorrhage.     

Radiograms of the paranasal sinuses as a principle of identifying catastrophe victims and unknown skeletons

The paper is devoted to the identification on the base of X-ray of frontal sinuses. These sinuses, developed in puberty doesn't change its shape during aging. Differentiation of the size and shape of sinuses is remarkable and probably is one of the individual features of the man. The system of classification of sinuses is proposed, basing on the area size, shape and symmetry. In the current everyday practice all X-ray radiograms are destroyed after five years of storage in Poland. For identification purpose all radiograms of sinuses and A-P punctures of skull should be stored in radiology departments, and arranged according to proposed classification system. The case is presented, in which the pictures of skull were the base of successful identification of skeleton.