[Manufacturing a double-lumen tube with simple and inexpensive materials].

Twin-channel enteral feeding catheters allow the administration of early enteral nutrition in various pathologies while avoiding the use of total parenteral nutrition. We describe how to manufacture one simply using cheap and easy-to-find materials whenever a commercial catheter of this type is unavailable.

[Formulating a non-fat diet to induce essential fatty acid deficiency in rats].

Objective: To describe the manufacture of an experimental diet to cause essential fatty acids deficiencies in rats.

Material And Methods: Rats. We used Wistar rats that were given a diet consisting of skimmed milk, starch, and dextrino maltose.

[A catalogue of fatty acids].

Fatty acids structure and function is an area of renewed interest because of its effects on plasma lipids, biosynthesis of prostaglandins, leucotrienes and thromboxanes, and the obligatory demands of some fatty acids, especially for the newborn. Fatty acids are identified in three different ways: by the classical nomenclature, by its trivial name, and by the new methods also known as the omega system. These three different methods have created some confusion.

[Naso-intestinal intubation with weighted tubes. A new modification of an old technique].

We have studied the spontaneous transpyloric passage of 25 weighted nasointestinal tubes using a modified technique slightly different from the standard one. Instead of introducing the entire tube in the stomach in the very first moment, we have only introduced at the beginning approximately 70 cm and afterwards, with the patient in the right lateral decubitus position, each 15 minutes we continued introducing 15 cm each time for a total period of one hour. X-ray controls were done 3, 24 and 48 hours after the first introduction.

[Fever of unknown origin. A study of 100 cases (author's transl)].

This report concerns the analysis of 100 cases of fever of unknown origin, defined according to the criteria of Petersdorf and Beeson. An etiological diagnosis could be reached in 77 cases, distributed as follows: infections, 32 cases; tumors, 14 cases; collagen diseases, 13 cases; various etiologies, 18 cases; and idiopathic, 23 cases of whom 20 had selflimited fever. There were 51 male and 49 female.