I wonder if 'bride' is a typo for 'bridge'. I have never come across a 'bride type' in this context before.

6 French introducers/sheaths are used with catheters.

Endovascular stents that bridge the aneurysmal neck facilitate the deposition of coils without parent artery occlusion

We developed a 6-Fr guiding catheter (Slim Guide®) that facilitates the performance of techniques requiring more than one microdevice.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3601621/

Name: Bridge Medtronic . Diameter 6-10 (mm)
via a 6 French sheath
https://books.google.co.uk/books?id=IfWbPg3OsLsC&pg=PA439&lp...

https://www.google.com/patents/EP0522735A1
Locking dilator (14) and peel away introducer sheath assembly (12) for ... many types of medical devices, including pacemaker leads are extremely soft and ... The proximal end of the introducer sheath contains a flange, a portion of which fits ...

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Note added at 2 hrs (2019-05-01 21:54:03 GMT)
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Nanostim Retrieval Cath - St. Jude Medical Instructions for Use Website
https://manuals.sjm.com/~/media/.../7a8db0ec-dcf6-4c7f-a89f-...
Snare closure knob with twist lock. 3. Deflection knob with twist lock. 4. Guide catheter. 5. LP introducer. 6. Flush ports. 7. LP introducer flange. 8. Guide catheter.

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Note added at 2 hrs (2019-05-01 21:55:47 GMT)
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introducer having - Translation into French - examples English ...
https://context.reverso.net/translation/english-french/intro...
Ensemble chirurgical comprenant un introducteur comportant une partie de poignée et ... a secondary heomstatic seal formed from a resilient material and having a flange ... secondaire formé d'un matériau résilient et comportant une bride.