DILATOR FOR PERFORMING MITRAL AND TRICUSPIDAL COMMISSUROTOMY PER ATRIUM CORDIS

• US 3,667,474 A
• Filed: 01/05/1970
• Issued: 06/06/1972
• Est. Priority Date: 01/05/1970
• Status: Expired due to Term

• Current Assignee: Georgy Fedorovich Romanov, Konstantin Vasilievich Lapkin, Lev Mikhailovich Popov, Vladimir Ilich Goloviznin
• Original Assignee: Georgy Fedorovich Romanov, Konstantin Vasilievich Lapkin, Lev Mikhailovich Popov, Vladimir Ilich Goloviznin
• Inventors: Lapkin, Konstantin Vasilievich, Romanov, Georgy Fedorovich, Goloviznin, Vladimir Ilich, Popov, Lev Mikhailovich
• Primary Examiner(s): Pace, Channing L.
• Application Number:
  US05/000,728
• Time in Patent Office: 883 Days
• Field of Search: 81/72 128/242,243,244,345 294/16,93
• US Class Current: 606/198
• CPC Class Codes: A61B 2017/22097 Valve removal in veins
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A dilator for performing mitral and tricuspidal commisurotomy per atrium cordis, comprising a working head with jaws and a jaw actuating mechanism, the working head being associated with a hand-operated drive through a flexible base. The working head of the dilator has a relatively rigid portion which enables the surgeon to easily pass the working head with finger guidance through tracts of any curvature, i.e., to utilize the dilator in all current methods of instrumental commissurotomy performed per atrium cordis. The working head of the dilator is distinguished by its high rigidity and strength.

Claims

1. A dilator for performing mitral and tricuspidal commissurotomy per atrium cordis, said dilator comprising a working head including trough-shaped jaws, a lever mechanism coupled to said jaws for opening and closing said jaws, said lever mechanism including two groups of levers, the levers of one of the groups being articulated to one end of said jaws, the levers of the other group being freely slidable along the inner lateral surfaces of said jaws adjacent the other end of said jaws, serving as guideways for said levers, a hand-operated drive means coupled to said lever mechanism to operate the same, a flexible base connecting the other ends of the levers of said one group to said hand-operated drive means, a flexible link accommodated inside said flexible base and connecting the other ends of the levers of said other group with said hand-operated drive means, and elongated spring elements connected at one end thereof to the jaws and at the other end thereof to the flexible base, one lever of each group being pivotally connected to a lever of the other group intermediate the ends thereof.

2. A dilator as claimed in claim 1 wherein said spring elements are connected to the jaws at the ends thereof remote from the ends at which said one group of levers are connected to said jaws.

3. A dilator as claimed in claim 2 wherein said protective elements are connected to the jaws proximate the said guideways.

4. A dilator as claimed in claim 1 wherein said jaws have a longitudinal plane of symmetry and said two groups of levers are symmetrically disposed with respect to said plane.

5. A dilator as claimed in claim 4 wherein said one group of levers include arms straddling the levers of said other group.

6. A dilator as claimed in claim 1 wherein said trough-shaped jaws are hollow and when closed are in contact with one another and define an enclosure in which the lever mechanism is completely enclosed.

7. A dilator as claimed in claim 1 wherein said spring elements are constituted as coiled extension springs.