RU95118403A

RU95118403A - CONTINUOUS OR CONTINUOUS INTRODUCTION OF THE THERAPEUTIC MEDICINE

Info

Publication number: RU95118403A
Application number: RU95118403/14A
Authority: RU
Inventors: Тейссен-Симони Клод
Original assignee: Фарма-Пласт Интернасиональ А/С
Priority date: 1993-03-09
Filing date: 1994-03-08
Publication date: 1998-01-10

Claims

1. Device for intermittent or continuous infusion of a therapeutic agent, such as insulin, comprising a cannula body with a soft plastic cannula intended for insertion into the patient’s body, where the cannula together with the cannula body form a through channel, the entrance to which in the cannula body is closed by a membrane, and also a sleeve with a needle for insertion into the through channel of the cannula body through the membrane, as well as guiding means for centering the needle relative to the membrane and the through channel, as well as fixing means for connecting with the connector housing of the cannula and sleeve with a needle, characterized in that the assembled body (1) of the cannula and sleeve with a needle (3, 41) form a substantially flat rear side (6) with a relatively large width in the direction parallel to it and along essentially perpendicular to the central longitudinal axis (14) of the through channel (13), the guiding means (15, 16, 21, 22, 42, 43) are the interacting guide pins (21, 22, 42, 43) and the guide channels (15, 16) on both sides of the needle (40, 51) and the through channel (13), the fixing means (31, 32, 44, 45) are elastic fix fixing pins (31, 32, 44, 45) located on the sides of the needle (40, 51) on the needle sleeve (3, 41) and provided with teeth (33, 34, 46, 47), and these fixing pins are installed with the possibility insertion into the cannulas intended for them (17, 18) in the cannula body (1), where the said notches have ledges (25, 26), mating with the teeth (33, 34, 46, 47).

2. The device according to claim 1, characterized in that the cannula body (1) and the sleeve with a needle (3, 41) are assembled in a substantially circular shape with a substantially uniform thickness, the cannula body forming a single unit with a protruding platform ( 35), essentially covering the entire rear side (6) of the sleeve with the needle (3, 41) in assembled form.

3. The device according to p. 2, characterized in that the cannula body (1) and the sleeve with the needle (3, 41) are assembled separated by a plane essentially passing through the center of the circle and perpendicular to the central axis (14) of the needle (40, 51 ) and the through channel (13), and the input (23) into the through channel (13) and into the guide channels in the cannula body is made in the protrusion (9), extending perpendicular to the diametrical plane and entering the corresponding recess in the sleeve with a needle (3, 41 )

4. The device according to claim 2 or 3, characterized in that the guide pins (21, 22, 42, 43) with the corresponding guide channels (15, 16) and the fixing pins (31, 32, 44, 45) with the corresponding recesses ( 17, 18) are located symmetrically with respect to the central plane perpendicular to the plane of the rear side (6) and coinciding with the central longitudinal axis of the needle (40, 51) and the through channel (13).

5. The device according to paragraphs. 2, 3 or 4, characterized in that the locking pins (31, 32, 44, 45) and the guide pins (21, 22, 42, 43) are located on the sleeve with a needle and that the teeth (33, 34, 46, 47) on the fixing pins facing in opposite directions, symmetrical recesses (37, 38) are made between the fixing pins (31, 32, 44, 45) to increase the flexibility of the fixing pins (31, 32, 44, 45).

6. The device according to one or more paragraphs. 1 - 5, characterized in that the recesses (17, 18) for the fixing pins (31, 32) along their entire length have a larger cross-sectional area than the fixing pins (31, 32), and near the bottom directly adjacent to the ledges ( 25, 26) engaged with the teeth (33, 34, 46, 47) of the fixing pins (31, 32, 44, 45) are in communication with the upper side of this part of the infusion device through the channels (27, 28).

7. The device according to one or more paragraphs. 1 - 6, characterized in that the central longitudinal axis (14) of the through channel (13) is inclined relative to the flat rear side (6), and the inlet end (23) with the membrane (12) is located further from the flat rear side (6) than the place where the cannula (2) leaves the cannula body (1), guiding means (15, 16, 21, 22, 42, 43), fixing means (17, 18, 31, 32, 42, 43), and the needle (40, 51) on the sleeve with a needle (3, 41) are also arranged to tilt accordingly.

8. The device according to one or more of paragraphs. 1 to 7, characterized in that the sleeve (41) with the needle (51) has the form of an input sleeve with a needle, intended for use when inserting the cannula (2) in the cannula body (1) into the patient’s body, the needle (51) of the input sleeve (41) for needles passes through the entire through channel (13) and exits through the open end of the cannula (2), at the same time, the input sleeve (41) for needles is made with an extension (48) protruding from the fixing means and facilitating handling of the device for infusion in the process of its placement.