Treatise on the radical cure of hernia by instruments : embracing an analysis of the mechanical properties of the various trusses now in use, a description of the new instruments invented by the author, and general directions to patients for the safe employment of these instruments, with hints to surgeons in their application, etc. / by Heber Chase.

  • Chase, Heber
Date:
1836
Catalogue details

Licence: Public Domain Mark

Credit: Treatise on the radical cure of hernia by instruments : embracing an analysis of the mechanical properties of the various trusses now in use, a description of the new instruments invented by the author, and general directions to patients for the safe employment of these instruments, with hints to surgeons in their application, etc. / by Heber Chase. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    114/230 (page 94)
    the parts interested in inguinal hernia, I had endea- voured to accommodate the instrument to this posi- tion, by giving its anterior extremity a much greater curvature downwards; but this was found to destroy the steadiness of the instrument, and the position required for the block is now obtained chiefly by means of the long rectangular neck of the block- slide, and the above-mentioned double adjustment; but the distance between the block and the spring necessarily renders the former a little less secure from changing its place; and for this reasdn the peri- neal band is attached to the block-shde instead of the spring. SECTION 3. OF THE UMBILICAL TRUSS. A few words on the peculiarities of the umbilical trussj represented as applied in fig. 31, p. 93, will com- plete the subject of single instruments. In this truss, the circular hlock (see fig. 26, p. 85,) is attached to a circular brass rider: (fig. 26, c.) and the rider is permanently fixed to a smaller circle of polished iron, [d] which is here substituted for the block slid^ of the inguinal truss, because no adjusting move- ment in the perpendicular direction is required in this species of hernia. The connexion between the rider and the iron disk is eifected by two screws, (e e) which fit all instruments alike; they are elongated and fur- nished with round heads so as to act as buttons for the