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MoHMA Spencer Wells Trocar 8" long, 5/8" diameter trocar with curved end for drain portion. The sharpened tip is a second tube inside the outer one which can be adjusted to various depths. A screw adjusts this depth. The whole tube slides through a bakelite or resin body 2"x 1" and there are two spring clamps to catch the cyst wall with sharpened claw ends. Used for ovariocentesis and paracentesis.The use of this device is described in: A treatise on surgery, its principles and practice - by Timothy Holmes - 1884 " A large band is to be passed round the belly of waterproof cloth, with a hiatus for the incision. She should be in the recumbent position on a firm table. The bladder should be empty. Full anaesthesia having been produced by ether, an incision is made in the linea alba from a little below the umbilicus to a little above the pubes, and this is deepened by successive strokes of the knife till the peritoneum is exposed. The peritoneum having been opened, some ascitic fluid very commonly escapes. The surgeon introduces his fore and middle fingers, and sweeps them round over the cyst to ascertain in the first place that he is really in the peritoneal cavity, and secondly to feel for adhesions. These, if present, are gently separated from the wall of the cyst, until the whole hand is introduced, and the cyst is freed from adhesions on all sides. Now the trocar is plunged into the cyst. To the trocar a tube is fixed which goes into a pail on the floor. As the cyst is punctured the surgeon seizes it with a vulsellum and draws it forward, so as to keep the trocar opening as much as possible outside of the wound in the belly, and he and his assistants take care that the trocar does not slip. Sir Spencer Wells has introduced a trocar the end of which is hollow and can be retracted within the canula. and which has a set of hooks on each side. As the cyst-wall collapses with the escape of the fluid it is drawn into the grasp of the hooks, and thus the canula is firmly fixed. I have used this trocar with good results; but if the cyst wall is thin the hooks are liable to tear it, and then it is better to trust to gentle traction with blunt forceps." https://www.mohma.org/instruments/category/obstetrics_and_gynecology/spencer_wells_trocar/

Category: Obstetrics and Gynecology
Estimated Date: 1863
Name: Spencer Wells Trocar
Manufacturer: Tiemann

Description: 8” long, 5/8” diameter trocar with curved end for drain portion. The sharpened tip is a second tube inside the outer one which can be adjusted to various depths. A screw adjusts this depth. The whole tube slides through a bakelite or resin body 2“x 1” and there are two spring clamps to catch the cyst wall with sharpened claw ends. Used for ovariocentesis and paracentesis.The use of this device is described in: A treatise on surgery, its principles and practice – by Timothy Holmes – 1884
“ A large band is to be passed round the belly of waterproof cloth, with a hiatus for the incision. She should be in the recumbent position on a firm table. The bladder should be empty. Full anaesthesia having been produced by ether, an incision is made in the linea alba from a little below the umbilicus to a little above the pubes, and this is deepened by successive strokes of the knife till the peritoneum is exposed. The peritoneum having been opened, some ascitic fluid very commonly escapes. The surgeon introduces his fore and middle fingers, and sweeps them round over the cyst to ascertain in the first place that he is really in the peritoneal cavity, and secondly to feel for adhesions. These, if present, are gently separated from the wall of the cyst, until the whole hand is introduced, and the cyst is freed from adhesions on all sides. Now the trocar is plunged into the cyst. To the trocar a tube is fixed which goes into a pail on the floor. As the cyst is punctured the surgeon seizes it with a vulsellum and draws it forward, so as to keep the trocar opening as much as possible outside of the wound in the belly, and he and his assistants take care that the trocar does not slip. Sir Spencer Wells has introduced a trocar the end of which is hollow and can be retracted within the canula. and which has a set of hooks on each side. As the cyst-wall collapses with the escape of the fluid it is drawn into the grasp of the hooks, and thus the canula is firmly fixed. I have used this trocar with good results; but if the cyst wall is thin the hooks are liable to tear it, and then it is better to trust to gentle traction with blunt forceps.”

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