Title:
Gastrointestinal tube
United States Patent 2498692


Abstract:
The invention described-herein may be manufactured and:used by or for the Government for governmental purposes, without payment to me of -any royalty thereon. The present invention :relates to gastro-intestinal tubes adapted to -be passed through into the pylorus and thence into-the small...



Inventors:
Paul, Mains Marshall
Application Number:
US6914349A
Publication Date:
02/28/1950
Filing Date:
01/04/1949
Assignee:
Paul, Mains Marshall
Primary Class:
Other Classes:
604/915
International Classes:
A61F2/958; A61J15/00; A61M31/00
View Patent Images:
US Patent References:
1863234Surgical apparatus1932-06-14



Description:

The invention described-herein may be manufactured and:used by or for the Government for governmental purposes, without payment to me of -any royalty thereon.

The present invention :relates to gastro-intestinal tubes adapted to -be passed through into the pylorus and thence into-the small intestine for the purpose of -withdrawing intestinal contents and for injecting rfluid material into the intestine.

Such tubes -as -made at present cannot be directed through the -stomach with any degree of facility, even -under fluoroscopy. These tubes tend to curl around in the stomach, and there is no way to direct the tip of the tube into the pylorus, and it -frequently is necessary to get the tip of the .tube into the.small .intestine as soon as possible, especially in patients who have intestinal obstruction.

One object of the present invention is to provide a gastro-intestinal tube which obviates the objections to the present construction of tubes and which is passed easily through the stomach into the pylorus under fluoroscopic control.

A further object of the invention is to provide a gastro-intestinal tube which is provided with means for positively guiding the tube through the stomach into the pylorus.

A still further object of the invention is to provide a gastro-intestinal tube upon which are provided means adapted to be grasped by the intestinal walls for propelling the tube through the pylorus into the intestine.

Further objects of the invention will become apparent as the description proceeds, and the features of novelty will be pointed out in particularity in the appended claims.

The invention will be understood more clearly by reference to the accompanying drawings, in which Fig. 1 is a diagrammatic view showing the improved tube of the present invention passing through the pylorus of the stomach into the small intestine.

Fig. 2 is fragmentary longitudinal sectional elevation of the distal end portion of the tube, with a fragment of the proximal end.

Fig. 3 is a view similar to Fig. 2, but showing the distal end of the tube flexed for guiding the tube into the pylorus; Fig. 4 is a side elevation of the tube shown in Figs. 2 and 3; Fig. 5 is a transverse sectional elevation through the tube, taken on the line V-V of Fig. 2, looking in the direction of the arrows; and Fig. 6 is another transverse sectional view, taken on the line VI--VI of Fig. 2, looking in the direction of the arrows.

Referring more particularly to the drawings, the improved gastro-intestinal tube of the present invention comprises a proximal portion A and a tlistal portion B, the periphery of the proximal portion A being continuously uninterrupted, while the distal portion B is characterized by an interrupted periphery due to oppositely projecting, relatively staggered projections or ears, which will be referred to further hereinafter.

The tube also comprises a continuous, resilient body 8, conveniently composed of molded rubber, the end :f the distal portion B terminating in a rigid tip 10 -secured thereto. The body 8 incloses a longitudinally extending, large lumen or fluid passage 12, which communicates with fluid passage holes 14 and 16, the series of holes 14 extending longitudinally along the periphery of the distal portion B of the tube, while the series of holes 16 extends circumferentially around the rigid distal tip 10. The body 8 of the tube also incloses a relatively narrow fluid passage or lumen 18, which extends parallel to the passage 12, but opens into the periphery of the distal portion B of the tube in advance of the tip end and with a channel 19 enclosed by a resilient, extensible balloon member 20 which can be inflated or deflated at will through air or other fluid passing under pressure through the passage 18, or through suction applied to this passage. In use, the distal tip 10, which is a rigid tip for guidance of the tube, is passed through the pylorus, as is indicated in Fig. 1, and into the intestine, then the balloon 20 is inflated by air or other fluid under pressure in the passage 18. The inflation of the balloon 20 after insertion into the intestine gives the intestine something large to grasp for propulsion of the tube along the intestine. The holes 14 and 16 enable gas and fluid to be evacuated from the intestine under suction applied to the passage 12, and, alternatively, fluid may be injected into the intestine through these holes.

It will be noted that the balloon member 20 is intermediate the series of holes 14 and 16.

As has been mentioned above, the periphery of the distal portion B of the improved gastrointestinal tube of this invention is interrupted by a pair of series of diametrically oppositely disposed projections or lugs 22, which extend in opposite directions from the periphery of the tube, the individual members of one of the series being staggered relatively to the individual members of the other series.

The body 8 of the tube also has molded therein, adjacent to the periphery of the tube, oppositely disposed passages 23, 25 which extend continuously through the proximal portion of the tube, these passages being of small diameter for receiving flexible fine wires 24, 26 that project from shoulder portions 27, 29 at the distal end of the proximal portion A of the tube, the first member of each series of the projections or lugs 22 being spaced sufficiently far from the shoulder portions 27 and 29 to permit the projecting ends of the wires 24, 26 to be twisted into a loop 28, which loops 28 prevent accidental pulling out of the wires 24 and 26 from their respective passages 23, 25, and also form convenient attaching means for threads or thin, flexible strings 30 which form, in effect, continuations of the wires 24 and 26, but which are threadable more easily through holes 31 provided therefor in each of the projections 22. The ends of the strings 30 are knotted adjacent to the inflatable balloon member 20. By pulling on the wires 24 and 26 and the strings 30, the distal tip 10 of the tube can be guided positively through the stomach and pylorus under direct vision using the fluoroscope for observing the course of the tube.

The provision of the guide means is found to facilitate greatly the use and manipulation of the improved tube of this invention, as the guide means for the tube enable the tip to be directed readily into the pylorus under fluoroscopic observation.

Having thus described my invention, what I claim as new and wish to secure by Letters Patent is: 1. A gastro-intestinal tube comprising a flexible body inclosing a pair of fluid passages extending longitudinally through the body of the tube, a rigid distal tip on the tube, a resilient expansible member on the tube adjacent to the tip, one of the fluid passages communicating with fluid passage ports provided in the tip and periphery of the tube proximally of the expansible member, the other of the pair of fluid passages opening into the expansible member, and oppositely disposed flexible guide means extending longitudinally through the body of the tube to a point adjacent to the expansible member for facilitating guiding the distal tip of the tube into and through the pylorus and into the small intestine.

2. A gastro-intestinal tube comprising a flexible body enclosing a pair of fluid passages extending longitudinally through the body, a rigid distal tip on the tube, a resilient expansible member on the tube adjacent to the tip, one of the said fluid passages communicating with fluid passage ports provided in the tip and periphery of the tube proximally of the expansible member, the other of the pair of fluid passages opening into the expansible member, oppositely disposed flexible guide means extending longitudinally through the body of the tube and terminating short of the expansible member, oppositely extending retaining members intermediate the said guide means and the expansible member, and flexible prolongations of the said guide means extending through the said oppositely extending retaining members and secured to a terminal member thereof adjacent to the expansible member for facilitating guiding the distal tip of the tube into and through the pylorus and into the small intestine.

MARSHALL PAUL MAINS.

REFERENCES CITED The following references are of record in the file of this patent: 40 UNITED STATES PATENTS Number Name Date 1,863,234 Bacon -------_ . June 14, 1932