Subcutaneous infusion set with dynamic needle
First Claim
1. An apparatus for subdermal delivery of fluid from a source of fluid to a patient at a controlled rate comprising a subcutaneous infusion device having a body portion provided with an internal chamber and including a hollow cannula connected to said body portion, said hollow cannula having:
- (a) an inlet end portion in fluid communication with the source of fluid;
(b) a central body portion disposed within said internal chamber for movement therewithin with respect to said inlet end portion; and
(c) an outlet end portion comprising a pierceable portion extending outwardly from said body portion for insertion into the patient, said outlet end portion also being movable with respect to said inlet end portion.
5 Assignments
0 Petitions
Accused Products
Abstract
A subcutaneous infusion set for the subdermal infusion of fluids which includes a housing having an internal chamber within which a uniquely configured infusion cannula is dynamically mounted. The cannula, which is generally spiral shaped, has a body portion that is disposed within the internal chamber and a pierceable portion which extends angularly outwardly from the base of the apparatus. With this construction, when the device is interconnected with a patient, normal movement by the patient will permit the cannula to move dynamically within the internal chamber while the base of the device which is removably affixed to the patient '"'"'s skin remains completely stationary.
305 Citations
11 Claims
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1. An apparatus for subdermal delivery of fluid from a source of fluid to a patient at a controlled rate comprising a subcutaneous infusion device having a body portion provided with an internal chamber and including a hollow cannula connected to said body portion, said hollow cannula having:
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(a) an inlet end portion in fluid communication with the source of fluid; (b) a central body portion disposed within said internal chamber for movement therewithin with respect to said inlet end portion; and (c) an outlet end portion comprising a pierceable portion extending outwardly from said body portion for insertion into the patient, said outlet end portion also being movable with respect to said inlet end portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for subdermal delivery of fluid to a patient at a controlled rate comprising:
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(a) a fluid delivery device comprising; (i) a base having an upper surface and a lower surface engageable with the patient and a fluid passageway in said base, said fluid passageway having first and second ends; (ii) stored energy means for forming in conjunction with said base, a reservoir having an outlet in communication with said first end of said fluid passageway, said stored energy means comprising at least one distendable membrane superimposed over said base, said membrane being distendable as a result of pressure imparted by fluid introduced into said reservoir to establish internal stresses, said stresses tending to move said membrane toward a less distended configuration; and (b) a subcutaneous infusion device connected to and spaced apart from said fluid delivery device for infusing medicinal fluid from said fluid reservoir of said fluid delivery device into the patient, said subcutaneous infusion device including a body having an internal chamber and a hollow cannula connected to said body, said hollow cannula having; (i) an inlet end portion in fluid communication with said second end of said fluid passageway of said base of said fluid delivery device; (ii) a central body portion disposed within said internal chamber for movement therewithin relative to said body; and (iii) an outlet end portion comprising a pierceable portion extending outwardly from said body for insertion into the patient. - View Dependent Claims (9, 10, 11)
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Specification