A system of midwifery . tinguishing marksbetween the French and English forceps. Although the pivot forms byfar the firmest lock, for the blades can never slip from each other, still the difficulty in locking, and also inseparating, the blades at a momentsnotice, render it much inferior to theEnglish lock. An ingenious modi-fication was invented by the lateProfessor Von Siebold of Berlin,but the most perfect lock is that ofProfessor Briininghausen of Wiirz-burg, first introduced by ourselvesinto this country, and commonlyknown among the instrument-ma-kers under the name of f
A system of midwifery . tinguishing marksbetween the French and English forceps. Although the pivot forms byfar the firmest lock, for the blades can never slip from each other, still the difficulty in locking, and also inseparating, the blades at a momentsnotice, render it much inferior to theEnglish lock. An ingenious modi-fication was invented by the lateProfessor Von Siebold of Berlin,but the most perfect lock is that ofProfessor Briininghausen of Wiirz-burg, first introduced by ourselvesinto this country, and commonlyknown among the instrument-ma-kers under the name of forceps. The shank ofone blade has a semicircular inden-tation, which, at the moment of lock-ing, fits into a fixed pivot in theother: this, therefore, combines the, advantages of the French and En-/ glish locks. We can safely affirm,from extensive experience for manyyears, that there is even less diffi- • A Treatise on the Improvement of Midwifery, chiefly with regard to the Operation:by Edmund Chapman, 2d edit. Naegeles forceps. 192 MIDWIFERY OPERATIONS. culty in locking it than with the English lock: the blades are capable ofinstant separation, and yet when locked, the firmness of their union isequal to that of a pivot joint. The handles of the English forceps are pieces of wood or ivory fixedupon each shank below the lock, flat upon the inside, convex externally,and furnished with a depression or groove at the lower end for fixing aligature round them. These handles were probably first introduced byDr. Smellie, who seems to have borrowed the idea from the forceps ofM. Mesnard, for the earlier English forceps, viz. of Giffard and Chapman,terminated in blunt hooks, those of the former being curved inwards, thoseof the latter outwards, a form of handle which has been retained in theFrench forceps up to the present time. There are two species of forceps, the long and the short forceps; theformer for cases where the head is still high in the pelvis, the latter whenit is
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Keywords: ., bookcentury1800, booksubjectmidwifery, booksubjectpregnancycompl
