Abstract: The wrench with position-retaining tab comprises the box wrench and a position-retaining structure. The box wrench is a hand tool used for tightening and loosening a threaded connection formed by a bolt or bolt-like structure. The box wrench and the threaded connection are defined elsewhere in this disclosure. The position-retaining structure attaches to the box wrench. The position retaining structure is a spring-loaded structure that inhibits the box wrench from slipping off the bolt or bolt-like structure during the tightening and loosening of the threaded connection.

Abstract: An electric device for performing a skin allergy test. The device has a main body having a metallic tip installed on the top thereof, and means of generation, transmission and control of an electric pulse contained inside the main body and electrically connected to the tip. The device includes a hollow outer nozzle having a cylindrical shape is located at the top of the main body that contains the tip inside so that it is not visible from outside. The device further includes means with a related tank releasing ink so that when the nozzle and the tip are placed in contact with a patient's skin then a series of ink marks are printed in sequence on the skin. Furthermore, an electric pulse is emitted on command, for each of the ink marks so that the pulse emitted from the tip generates a respective small surface hole on the skin.

Abstract: A container made from an electrically insulating material whose walls are functionally connected to a temperature sensor and incorporate heating groups consisting of a plurality of elongate metal elements; should the container be made from glass, the coefficient of thermal expansion of the heating groups is similar to that of glass. The container is functionally associated with an electronic power and control module, connected to the heating groups and comprising a rechargeable energy accumulator of a type with one or several high-performance cells. The metal elements are heated by Joule effect by the flow of a pulsed current provided by the energy accumulator and controlled by the electronic power and control module.

Abstract: The present invention provides an improved intravenous catheter which can be installed at a minimal diameter and expanded once installed to a full operational diameter. The apparatus of the present invention comprises a first catheter tube member with an expandable sidewall and a wider second member which inserts into the first member once the first member is installed in a vein to cause it to expand to an operational diameter. The apparatus and method of the present invention provide many options to medical personnel and are particularly useful when employed in trauma situations.