A combination of the English and French obstetric locks, for the prevention of dangerous compression of the fetal head by forceps / by A. Ernest Gallant.

  • Gallant, A. Ernest (Albert Ernest), 1861-
Date:
1907
Catalogue details

Licence: In copyright

Credit: A combination of the English and French obstetric locks, for the prevention of dangerous compression of the fetal head by forceps / by A. Ernest Gallant. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    ing traction can force the blades together, and lateral compression of the head is avoided. (Ann. Gynec. and Ped., 1906, xix, 649). 2. The safety lock to which I now direct atten- tion shows a combination of the English and French locks, the thumb-screw of the latter having been inserted, free, through a circular hole in the B Gallant’s safety obstetric lock. A Shows countersunk notch in right blade; and set-screw passing through flange into shank of left blade. B Shows forceps locked, set-screw set, fixing blades so that they cannot be forced together by external pres- sure of the genital tract, thus avoiding undue com- pression of the fetal head. flange of the left blade, and is screwed into the main portion of the shank. The right blade is pro- vided with a notch on its inner side, partially coun- tersunk, which embraces the thumb-screw. When the latter is set it securely fastens the blades at the lock, and if the instrument is made of forged steel, the blades cannot be forced together by any amount of traction force which it is justifiable to exercise,