Should the operator throw in mixtures one and two until the parts are fairly distended and the hernia be not held it is better to use only the plain sterile vaseline for a subsequent injection at the site of the internal ring. If a half dram of vaseline at this point does not hold the hernia a small amount of vaseline may
then be thrown in the central portion of the canal.
At first the vaseline injections should be used whenever in doubt as to the amount needed above a certain point. As the operator becomes acquainted with the needs of cases by experience the vaseline can be largely substituted by the paraffin mixture number one.
TECHNIC TO BE USED IN INJECTING INGUINAL HERNIA.
Have a syringe loaded with paraffin mixture number one and another loaded with sterile vaseline. See that the paraffin flows smoothly from the syringe without leaks. See also that the vaseline syringe is working smoothly.
Have needles intended for injection of paraffin free from this agent. Place patient on back, thighs flexed slightly or straight if the external ring is easily accessible. Follow the spermatic cord and locate definitely the external ring.
Attach empty syringe to needle. Pass needle point through skin. As soon as needle point is through skin exhaust syringe. That is draw piston out to form vacuum in syringe and obtain suction. Pass the needle slowly through
external ring and along close to the roof of inguinal canal.
When needle is in full length, if no vein has been struck and blood aspirated into the syringe, detach syringe and screw the paraffin syringe tightly to needle.