A cut through the symphysis will cause the pubic bones to separate and increase the pelvic circumference with three or more cm (two fingers). Sufficient to resolve a mechanical disproportion due to a large head and/or a narrow pelvis
Indications:
Fetal head stuck so firm and deep in the birth canal that C/S is not an option
Shoulder dystocia
Retained head in breech
To avoid damage to urethra a catheter in the bladder is most important . The urethra with the indwelling catheter is pushed aside when the cut through the symphysis is made.
OPEN
SYMPHYSIOTOMY
Preferred method for unexperienced
Local infiltration anesthesia
Insert a catheter in the bladder
Make a 4 to 5 cm long vertical incision through the skin and subcutaneous tissue in front of the symphysis
Insert a self-retaining wound retractor
With two fingers in the vagina push the urethra to either side
Cut strictly in the midline with a scalpel
Confirm visually and by palpation that the pubic bones have separated
Deliver the baby
Close the incision
Keep the catheter indwelling for 24 hours
Mobilize the patient immediately and without any restrictions
CLOSED SYMPHYSIOTOMY
Preferred method for more experienced
Insert a catheter in the bladder
Local infiltration anesthesia
Use the injection needle to probe and define the exact location of the symphysis
Push the urethra to the side with two fingers in the vagina
Cut strictly in the midline with a scalpel
Confirm by palpation in vagina or suprapubically that the pubic bones have separated
Deliver the baby
The small incision does not need suturing
Keep catheter indwelling for 24 hours
Mobilize patient immediately and without any restrictions