Transfusion apparatus

• US 4,820,268 A
• Filed: 10/30/1987
• Issued: 04/11/1989
• Est. Priority Date: 11/05/1986
• Status: Expired due to Term

• Current Assignee: Nikkiso Company Limited
• Original Assignee: Nikkiso Company Limited
• Inventors: Miyatake, Tetsuya, Kawamura, Takao
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Daley, Kathleen A.
• Application Number:
  US07/114,739
• Time in Patent Office: 529 Days
• Field of Search: 604/65, 604/67, 604/66, 604/251, 604/253, 604/153, 604/123, 604/122
• US Class Current: 604/67
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/1689 Drip counters

Abstract

A transfusion apparatus including a pump section for sequentially pressing and blocking a transfusion tube to feed a liquid, a detecting section for detecting a given cycle of pump operation in the pump section, and a drive-control for driving and controlling the pump section is disclosed, in which the transfusion tube on an upstream side above the pump section is provided with a dropping cylinder on which is arranged a detector for counting the number of droplets and that the apparatus is further provided with a comparator for comparing the number of droplets in the given cycle of the pump operation with a predetermined value to judge a type of a transfusion set.

Claims

1. A transfusion apparatus comprising a pump section for sequentially pressing and blocking a transfusion tube to feed a liquid, a detecting section for detecting a given cycle of pump operation in said pump section, and a drive-control section for driving and controlling said pump section, characterized in that the transfusion tube on an upstream side above the pump section is provided with a dropping cylinder on which is arranged a detector for counting the number of droplets, said detector comprising a drop sensor arranged at the dropping cylinder and a counter for counting output signals from said drop sensor as the number of droplets during said given cycle detected by a position detector in the pump section, said apparatus further comprising a comparator for comparing the number of droplets resulting from the output of the drop detector and the detecting section during said given cycle of the pump operation with a predetermined value to determine the numerical relation therebetween for discriminating the transfusion set for adults or for children.

2. A transfusion apparatus comprising a pump section for sequentially pressing and blocking a transfusion tube to feed a liquid, a detecting section for detecting a given cycle of pump operation in said pump section, and a drive-control section for driving and controlling said pump section, characterized in that the transfusion tube on an upstream side above the pump section is provided with a dropping cylinder on which is arranged a detector for counting the number of droplets and that the apparatus further comprises a first comparator for comparing the number of droplets in said given cycle of the pump operation with a predetermined value to judge a type of a transfusion set, and a second comparator for judging whether the number of droplets, which determines a conversion rate for a transfusion volume previously established depending on a judging output signal from said first comparator, is proper or not.

3. The transfusion apparatus according to claim 2, wherein the first comparator compares the number of droplets resulting from the output of the drop detector and the detecting section during the given cycle of the pump operation with the predetermined value to determine the numerical relation therebetweeen for discriminating the transfusion set for adults or for children, while the second comparator compares the number of droplets, which determines a conversion rate for a transfusion volume previously established depending on a judging output signal from said first comparator, with a referential value to determine the numerical relation therebetween for judging whether the transfusion set is applicable to the adults or children.

4. The transfusion apparatus according to claim 2, wherein the second comparator generates a judging output signal for instructing operation of a warning circuit and stoppage of a controlling circuit of a pump-driving motor.