Bartels collected the data of 98 such cases, only four recovering.

When the rent is confined to the anterior wall of the bladder the urine escapes into the pelvic tissues, and the prognosis is much more favorable.
Bartels collected 54 such cases, 12 terminating favorably.

When celiotomy is performed for ruptured bladder, in a manner suggested by the elder Gross, the mortality is much less.

Ashhurst collected the reports of 28 cases thus treated, ten of which recovered--a mortality of 64.2 per cent.

Ashhurst remarks that he has seen an extraperitoneal rupture of the anterior wall of the bladder caused by improper use of instruments, in the case of retention of urine due to the presence of a tight urethral stricture.
There are a few cases on record in which the bladder has been ruptured by distention from the accumulation of urine, but the accident is a rare one, the urethra generally giving way first.