Enteral delivery set with shaded drip chamber

• US 4,909,797 A
• Filed: 01/16/1987
• Issued: 03/20/1990
• Est. Priority Date: 01/16/1987
• Status: Expired due to Term

• Current Assignee: Sherwood Services AG
• Original Assignee: Sherwood Medical Company (Medtronic Plc)
• Inventors: Timothy, Earle J.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/003,955
• Time in Patent Office: 1,159 Days
• Field of Search: 604/65, 604/67, 604/245, 604/251, 604/253-255, 604/122, 604/246, 604/252, 604/403, 604/405, 604/407, 128/DIG. 12, 128/DIG. 13, 73/861.41
• US Class Current: 604/253
• CPC Class Codes: A61M 5/1689 Drip counters
• CPC Class Codes: Y10S 128/13 Infusion monitoring

Abstract

A drip chamber for an enteral nutrition system having an optical drip detector is provided with an opaque upper portion to reduce the amount of ambient light entering the optical sensor for the drip detector.

Claims

1. An enteral delivery set for use with an enteral feeding pump having a recess to receive the drip chamber of an enteral feeding set, and radiant energy responsive means disposed at a predetermined level in said pump recess for sensing an operating condition in said drip chamber, comprising an elongated, downwardly tapering drip chamber having a closure at its upper end provided with an inlet connectable to a source of feed and having an outlet at its lower end, at least part of said drip chamber lying above said sensing means when the drip chamber is disposed in the pump recess being resistant to the transmission of radiant energy;

said closure for the drip chamber comprises a disk-like cap having a skirt extending into the upper end of the drip chamber at least to the level of said sensing means when the drip chamber is received in said pump recess, said cap and said skirt being resistant to the transmission of radiant energy therethrough;

said skirt extends below the level of said sensing means when the drip chamber is received in said pump recess and windows are formed on opposite sides of said skirt in the vicinity of the level of said sensing means, said windows defining a radiant energy transmission path across said drip chamber.

2. An enteral delivery set as in claim 1 in which said windows are shaped as slots extending upwardly from the bottom of said skirt to accommodate said sensing means, said slots being in registering relation so as to define a radiant energy transmission path across said drip chamber.

3. An enteral delivery set as in claim 2, with means in said drip chamber to facilitate assembly of said drip chamber in said pump recess, with said windows and said sensing means in accurate alignment.