During the mfg process, samples are inspected from each lot of vasoseal vhd to assure that there are no deviations from the specs.
Co has reviewed the mfg records of this lot of vasoseal vhd.
The co's review of these records indicated no deviation from spec for this production lot.
The returned sample was evaluated by the co's engineering dept.
The sheath and hub were returned and were observed to be separated with two collagen plugs inside the sheath.
Two plunger/cartridge assemblies were also returned.
The plunger, cartridge, and sheath/hub interface were all within spec.
These dimensions were verified with calibrated instruments.
The sheath was separated from its hub and a small portion of the sheath material was visible within the hub.
The sheath's distal end exhibited a slight distortion and is not totally round.
There was no sign of visible kinking between the distal and proximal ends of the sheath.
Two collagen plugs were located inside the sheath.
Both plugs were temporarily fused together.
The probable cause for the failure experienced is that occlusive pressure was applied too close (<3 cm) to the puncture site, which compressed the sheath, trapping the first collagen plug.
Upon deploying the second plug, occlusive pressure remained too close and the second plug stopped up against the first plug.
Additional force caused the sheath and hub to separate.
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