Don't have enough context to know whether the particular medical situation corresponds to this term, but it's what Termium has, in a medical context; it is also related to hypodermic needles, which is the context I find it in, when I do a Google search with some of your other key words. See, for instance,
www.lsmedical.fr/pro/9_aiguille.php

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From Termium:

Subject Field(s)  – Medical Instruments and Devices
Subject Field(s)  – Instruments et appareillage médicaux
hub Source CORRECT
embout Source CORRECT, MASC embase Source CORRECT, FEM DEF – The enlarged base by which a hollow needle (as for
hypodermic) may be attached to a syringe or other device. Source

CONT – En 1925, Becton-Dickinson inventait un procédé nouveau de fixation de l'aiguille à la seringue grâce à un
épaulement qui termine l'embout de l'aiguille et qui permet de visser celle-ci à l'intérieur d'un embout de
seringue fileté. Ce dispositif fut dénommé Luer-Lok [...] Source
1996-09-05
 © Minister of Public Works and Government Services Canada

"OF" = ordre de fabrication / manufacturing order. From LGDT:

Domaine(s) gestion gestion des opérations et de la production
manufacturing order (a)
A document or group of punched cards conveying authority for the manufacture of specified parts or products in specified quantities. The manufacturing order sometimes also shows the date when the job must be completed and sometimes shows due dates for each individual operation that have been assigned by the scheduler. (a)
Synonyme(s):
fabrication order (b)
Voir aussi: assembly order manufacturing release

ordre de fabrication n m (cde)
terme tiré d'un ouvrage recommandé par l'Office de la langue française
Document indiquant au service de fabrication de mettre à disposition telle quantité de tel produit pour telle date. (f)
Abréviation(s): OF (g)
terme tiré d'un ouvrage recommandé par l'Office de la langue française
[Office de la langue française, 1981]