Final answer:
The instruments used to treat severe strictures of the urethra are called urethral dilators or catheters.
Step-by-step explanation:
The instrument used to bypass severe strictures of the urethra is typically referred to as a urethral dilator or a catheter, not to be confused with procedures for female reproductive health such as in vitro fertilization or fallopian tube surgery.
In a medical context, urethral strictures are a narrowing of the urethra, which can impede the flow of urine and semen through the p*nis, a male reproductive organ. Procedures such as in vitro fertilization or surgical removal of the obstruction followed by the re-ligation of the ends of the fallopian tubes are generally related to female reproductive health and are not used to treat urethral strictures.
Thus, the instrument used to bypass severe strictures of the urethra is called a urethral dilator or stent. This device is inserted into the urethra to widen the narrowed or blocked area, allowing urine to pass through. Urethral dilators or stents are commonly used to treat conditions such as urethral strictures.