Catheter for nasogastric intubation

• US 4,687,470 A
• Filed: 12/16/1985
• Issued: 08/18/1987
• Est. Priority Date: 12/16/1985
• Status: Expired due to Term

• Current Assignee: Sherwood Services AG
• Original Assignee: Sherwood Medical Company (Medtronic Plc)
• Inventors: Okada, Yosuke
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/809,534
• Time in Patent Office: 610 Days
• Field of Search: 604/163, 604/171, 604/161, 604/270, 604/285, 604/275, 128/657, 128/DIG. 26
• US Class Current: 604/171
• CPC Class Codes: A61M 2025/022 specifically adapted for the mouth
• CPC Class Codes: A61M 2025/024 having a clip or clamp system
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: Y10S 128/26 Cannula supporters

Abstract

The present invention provides an intubation assembly for nasogastric intubation comprising a catheter and a plastic sheath tube for encasing the catheter along substantially the full length thereof, the sheath tube having a longitudinal tear-off line over the full length thereof and having elasticity and rigidity slightly greater than the catheter which is slidably inserted in the sheath tube.

Claims

1. A medical intubation assembly a distal end of which is adapted to be inserted internally of a patient, said assembly comprising

a relatively soft catheter of a first relatively small diameter and having a length to reach from externally of the patient to a desired point internally of the patient;

a relatively rigid longitudinally splittable insertion tube of a second and relatively larger diameter and having an internal bore slidably receiving and encasing said catheter, said insertion tube having, and being splittable along, two opposed longitudinally extending lines of weakness along the full length thereof to facilitate splitting thereof for withdrawal from the patient and removal from about said catheter; and

a catheter fixing means adapted to be removably fixed adjacent a proximal end of said catheter externally of the patient for fixedly positioning said catheter during withdrawal of said insertion tube from the patient and removal of said insertion tube from about said catheter, said catheter fixing means including a plate means adapted to abut the patient adjacent the location of insertion of the intubation assembly, the catheter fixing means including a catheter receiving groove having a diameter slightly smaller than said first diameter for pinching engagement with said catheter during withdrawal and removal of said insertion tube from about said catheter, portions of said plate means positioned on opposite sides of said groove to abut each of the split halves of said insertion tube upon withdrawal thereof to assist in separating and splitting of said insertion tube along said longitudinally extending lines.

2. A nasogastric intubation assembly a distal end of which is adapted to be inserted through a patient'"'"'s nostril and esophagus into the patient'"'"'s intestine and/or stomach, said assembly comprising an elongated relatively soft catheter of a first relatively small diameter and having a length to reach from externally of the patient through the patient'"'"'s nostril and esophagus and into the patient'"'"'s intestine and/or stomach, said catheter having an internal bore and a bore outlet adjacent the distal end thereof, and an elongated relatively rigid longitudinally spittable insertion tube of a second and relatively larger diameter having an internal bore receiving and encasing said catheter substantially about the full length thereof, said insertion tube having a length to reach from externally of the patient through the patient'"'"'s nostril and esophagus and into the patient'"'"'s intestine and/or stomach, said insertion tube being peripherally continuous but having at least one longitudinal extending line of weakness along the full length thereof whereby said insertion tube is adapted to be split along said line of weakness after insertion of the distal end thereof into the patient for withdrawal and removal of said insertion tube from about said catheter without withdrawal of the distal end of said catheter from the patient'"'"'s intestines and/or stomach, and catheter fixing means adapted to removably fixed to said catheter adjacent a proximal end thereof externally of the patient for fixedly positioning said catheter during withdrawal and removal of said insertion tube, said catheter fixing means including a generally C-shaped plate means having spaced inner and outer legs, said inner leg adapted to abut the patient adjacent the patient'"'"'s nostril and having a key-shaped groove having a diameter slightly larger than said second diameter for loosely supporting and guiding said insertion tube and said outer leg having a key-shaped groove of said first diameter for pinching engagement with said catheter to removably fix said catheter to said C-shaped plate means during withdrawal and removal of the insertion tube.