Intrauterine device with seeker for finding the cervical os and housing member for fitting device in an inserter

• US 3,993,058 A
• Filed: 06/23/1975
• Issued: 11/23/1976
• Est. Priority Date: 08/21/1974
• Status: Expired due to Term

• Current Assignee: ALZA Corporation (Johnson & Johnson)
• Original Assignee: ALZA Corporation (Johnson & Johnson)
• Inventors: Hoff, Seymour
• Primary Examiner(s): Trapp, Lawrence W.
• Application Number:
  US05/589,270
• Time in Patent Office: 519 Days
• Field of Search: 128/127-131, 128/260, 128/267
• US Class Current: 128/839
• CPC Class Codes: A61F 6/144 with T-configuration

Abstract

Intrauterine device with a seeker and housing member is disclosed. The seeker is a curved-wall member positioned at the lead end of the device for finding, and guiding the device into the external cervical os. The housing member is positioned at the trailing end of the device and it has a smaller diameter than the device for receiving a thread and for presenting a smaller mass to an inserter.

Claims

1. An improved intrauterine device adapted for easy insertion and prolonged placement in a fertile uterus, the device consisting of a transverse member, a longitudinal member dependent upon the transverse member and suitably united thereto with the longitudinal member having a substantially uniform internal diameter, a lead end formed where the transverse and longitudinal members unite, a trailing end distant from the lead end on the longitudinal member, the improvements consisting essentially of a seeker member having a curved surface raised above the plane of the transverse member continuous with the lead end and having an external diameter substantially equal to the external diameter of the longitudinal member, and a housing member formed continuous with the trailing end of the longitudinal member and having an external diameter smaller than the diameter of the longitudinal member.

2. The improved device according to claim 1 wherein the seeker has its axis coextensive with the axis of the longitudinal member, and wherein the seeker enhances finding the external cervical os and concomitantly stabilizes and guides the device thereto.

3. The improved device according to claim 1 wherein the housing member has its axis coextensive with the axis of the longitudinal member and wherein the housing member presents a reduced mass to an inserter when the device is housed therein.

4. The improved device according to claim 1 wherein the transverse member is substantially linear and the seeker is formed continuous with said member.

5. The improved device according to claim 1 wherein the longitudinal member is substantially linear and the seeker is formed continuous with said member.

6. The improved device according to claim 1 wherein the device is sized to fit nulliparous and multiparous uterine cavities.