US 5,851,197 A · Injector for a subcutaneous infusion set

Abstract

An injector is provided for automatic placement of a subcutaneous infusion set or the like used for delivering a selected medication to a patient. The injector comprises a spring-loaded plunger having a head for receiving and supporting an infusion set in a position for placement of an insertion needle and related cannula through the skin of a patient at a selected insertion site. The plunger head includes a safety lock mechanism for engaging and retaining the infusion set during spring-loaded advancement with a controlled force and speed toward the patient's skin to transcutaneously place the insertion needle and cannula. When the plunger head reaches a fully advanced position, with the infusion set placed on the patient, the infusion set is releasible from the safety lock mechanism with minimal force to permit quick and easy separation of the injector.

Claims24

Dependent claims

An injector for transcutaneously placing a medical needle through the skin of a patient, comprising:

a barrel having an elongated bore formed therein;
a plunger slidably received within said barrel for movement between an advanced position and a retracted position, said plunger including means for receiving and supporting the medical needle in a position for transcutaneous placement upon movement of said plunger from said retracted position to said advanced position;
spring means for urging said plunger toward said advanced position;
and
trigger means for releasibly retaining said plunger in said retracted position, said trigger means being operable to release said plunger for spring-loaded movement with a controlled force and speed toward said advanced position;
said means for receiving and supporting the medical needle including safety retainer means for retaining the medical needle on said plunger when said plunger is moved from said retracted position to said advanced position, said retainer means permitting separation of the medical needle from said plunger when said plunger is in the advanced position.

3 more elements

An injector for transcutaneously placing an insertion needle and related cannula thereon of a subcutaneous infusion set through the skin of a patient, comprising:

a barrel having an elongated bore formed therein;
a plunger slidably received within the barrel for movement between an advanced position and a retracted position, said plunger including means for receiving and supporting the infusion set in a position with the insertion needle and cannula oriented for transcutaneous placement upon movement of said plunger from said retracted position to said advanced position;
spring means for urging said plunger toward said advanced position;
and
trigger means for releasibly retaining said plunger in said retracted position, said trigger means being operable to release said plunger for spring-loaded movement with a controlled force and speed toward said advanced position;
said means for receiving and supporting the infusion set including safety retainer means for retaining the infusion set on said plunger when said plunger is moved from said retracted position to said advanced position, said retaining means permitting separation of the infusion set from said plunger when said plunger is in the advanced position.

3 more elements

Dependencies are inferred from the claim text.

Injector for a subcutaneous infusion set

Life of this patent

Injector for a subcutaneous infusion set

Life of this patent

Abstract

Claims24