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Analysis of Set Screw and Side‐Lock Connector Reliability
Author(s) -
TYERS G.F.O.,
SANDERS R.,
MILLS P.,
CLARK J.
Publication year - 1992
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1992.tb03010.x
Subject(s) - lock (firearm) , cable gland , medicine , header , lead (geology) , reliability (semiconductor) , power (physics) , mechanical engineering , surgery , computer science , engineering , computer network , geomorphology , geology , physics , quantum mechanics
A retrospective review of complications with connectors and lead‐to‐header interfaces was performed following 649 pacing procedures between 1980 and 1990. There were 88 lead revisions (13.6%), 81 device replacements; or modifications (12.5%), and 480 new implants (74%) using devices of five manufacturers. Two basic connector types were studied, one utilizing a set screw and the other using a side‐lock compression fitting. The set screw makes electrical contact and mechanically secures the lead connector pin with a set screw insulated by a self‐sealing grommet or an integral or separate set screw cover. The side‐lock makes electrical contact with an automatic spring mechanism while the plastic lead terminal is secured in the connector block of the pacemaker by a Delrina side‐lock compression fitting. Four hundred fifty‐nine set screw connector devices were followed for up to 12 years with 14 complications(3.1%)whereas 82 side‐lock connector devices were followed for up to 5 years with one complication (1.2%). The set screw and side‐lock connectors were reliable over the period of follow‐up. Although the complication rate appeared lower with the side‐lock, follow‐up was shorter and the number of implants smaller. With the leads used in this study, the side‐lock proved to be a desirable feature due to simplicity, speed, safety, and ease of use. One limitation is the requirement for a precise IS‐1 connector terminal diameter.