Methods of manufacturing flexible polymeric medical spiral tubings, tubings made by the methods and uses of the tubings

摘要

Methods of manufacturing a length of a flexible polymeric medical tubing of the kind comprising a tubing member defining a lumen, which tubing member is surrounded by spiral convolutions along at least a part of the length of the proximal section and/or the distal section, and which medical tubing has a proximal convoluted section and a distal convoluted section, is disclosed, as well as medical tubings obtained by the methods and their uses. One method comprises the steps of providing a medical tubing wherein the proximal section and the distal section have substantially uniform initial pitch (Pinitial) between adjacent convolutions, and modifying the initial pitch (Pinitial) of at least a part of the proximal section by stretching at least a part of the proximal section to achieve a modified proximal section with a proximal pitch (Pproximal) between adjacent convolutions that is larger than the initial pitch (Pinitial) between adjacent convolutions. In another method the medical tubing is manufactured in a molding process. The so obtained medical tubing is particularly suited for use in open surgical procedures that requires suction and/or irrigation during use of an electrosurgical instrument.

主权项

1. A method of manufacturing a length of a polymeric tubing member, the method comprising:
providing a polymeric tubing member defining a lumen, where the tubing member is surrounded by spiral convolutions along at least a part of the length (L), and where the tubing member has a proximal convoluted section having a length (LP) and a distal convoluted section having a length (LD), wherein the proximal convoluted section has a substantially uniform initial proximal pitch between adjacent convolutions and the distal convoluted section has a substantially uniform initial distal pitch between adjacent convolutions; and modifying the initial proximal pitch of at least a part of the proximal convoluted section by stretching at least a part of the proximal convoluted section to achieve a modified proximal convoluted section with a modified proximal pitch between adjacent convolutions that is larger than the initial proximal pitch between adjacent convolutions; wherein the step of modifying the initial proximal pitch modifies an initial total length of the tubing member so that the modified total length is made at least 5.5% longer than the initial total length.