Why the study?
Does the screw-in type pacing lead require less tensile force for extraction compared to the tined type in a canine model?
Does the screw-in type pacing lead require less tensile force for extraction compared to the tined type in a canine model?
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Screw-in type pacing leads require significantly less tensile force for extraction than tined type leads in a canine model, suggesting they may be safer and easier to manually retract if infected.
Three months after implantation of endocardial pacing leads in 10 mongrel dogs, the tensile forces needed to remove 5 tined type and 5 screw-in type leads were compared experimentally. Mean maximum tensile force was 291 +/- 174 g with the screw-in type and 1174 +/- 369 g with the tined type (p < 0.01). Histopathologically, no changes suggesting any myocardial damage due to lead extraction were recognized in cases where screw-in type leads were used. These results support the clinical feasibility of safe and easy manual retraction of infected pacing leads of the screw-in type.
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Amitani et al. (1996) studied this question.
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