Medical-surgical tube

• US 3,373,735 A
• Filed: 10/21/1965
• Issued: 03/19/1968
• Est. Priority Date: 10/21/1965
• Status: Expired due to Term

• Current Assignee: John P. Gallagher
• Original Assignee: John P. Gallagher
• Inventors: Gallagher, John P.
• Application Number:
  US04/500,118
• Time in Patent Office: 880 Days
• US Class Current: 600/581
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61J 15/0003 Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
• CPC Class Codes: A61J 15/0088 for sensing parameters related to the device
• CPC Class Codes: A61M 25/00 Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: A61M 31/00 Devices for introducing or retaining media, e.g. remedies, in cavities of the body A61M25/00 takes precedence ; introducing or retaining ophthalmic products into the ocular cavities A61F9/0008
• CPC Class Codes: Y10T 137/8359 Inspection means

Abstract

1,104,774. Body fluid testing device. J. P. GALLACHER. 11 Aug., 1966 [21 Oct., 1965], No. 35934/66. Heading B1X. [Also in Division A5] A liquid-testing device comprises a tube at one end portion of which is colour-change indicator means located in spaced relation with the internal surface of the tube. The tube includes means which provides liquid communication between the other end of the tube and the indicator means so that the indicator means may be exposed to, and thus may convey information relating to, liquid which initially is adjacent this other end portion of the tube. The indicator means may comprise an absorbent carrier, for example of paper, on which is absorbed a colour-change indicator; the indicator may be an acid-base colour-change indicator, for example litmus, phenolphthalein, methyl orange or phenol red. In the embodiment illustrated in Figure 5, the indicator means is in the form of an absorbent band 22" carrying a colour-change indicator and removably mounted on the outer wall surface 24" of the tube 10" at the end portion 12" thereof by means of a plastics or metal sleeve 46. The liquid communication means is provided by a plurality of perforations 28" formed in a zone 44 to extend through the wall of the tube from the internal wall surface 26" thereof to the indicator means; alternatively or in addition, the liquid communication may be provided by a plurality of capillary bores 40 (see Fig. 3) and/or by a channel filled with wicking material. In the embodiment of Figs. 2, 3 and 4 (Figs. 2 and 4, not shown), the absorbent band 22 is mounted between the inner and outer wall surfaces 26 and 24 of the tube. The liquid-testing device is of especial use in medical or surgical procedures.

Claims

1. A MEDICAL-SURGICAL TUBE HAVING AN INTERNAL END PORTION ADAPTED TO BE INSERTED WITHIN A BODY CAVITY AND AN EXTERNAL END PORTION ADAPTED TO REMAIN OUTSIDE THE BODY, A COLOR-CHANGE ACID-BASE INDICATOR CARRIER MEANS ON THE TUBE AND LOCATED ADJACENT THE OUTLET END PORTION OF THE TUBE, AND MEANS PROVIDING LIQUID COMMUNICATION BETWEEN THE INNER WALL OF THE TUBE AND SAID INDICATOR CARRIER MEANS..