A new lithotomy operation / by Hugh Owen Thomas.

  • Thomas, Hugh Owen, 1834-1891
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: A new lithotomy operation / by Hugh Owen Thomas. Source: Wellcome Collection.

    5/18 (page 5)
    s angle from whence the median groove commences and terminates at the wooden cylinder sunk into the groove at c. At a is a stop-cock for retention of fluid injected into the bladder before operating. Situated at about and inch from the angle is a notch partly secting the median groove —fig i h. The joint at b unlocks when the extra-urethral Fig. 3. F|e-4- staff is at right angles to the urethral one, but cannot escape; as soon as it descends parallel with the other, it is then locked by an ordinary spring catch. Fig. 2 shows the instrument as in operation. The second staff is also grooved and pointed, so as, when in use, to enter and sink into the groove of the first staff at the notch (A) only. It is very necessary that the instrument maker when constructing the second staff, should make its angle, so that when it is in position, it is a little lower than that of the first one; otherwise, the second staff in describing an arc to enter the perineum will enter high and lock low, which may lead the surgeon to make his incisions rather high, whereas by attention to making the second staff a little longer than the first, it enters the perineum low, and gradually rises to the notch, thus almost certainly protecting the bulb and its artery.