Urology surgical instruments are bought in French sizes, not millimetres, and the two are not interchangeable in a catalogue. Peak Surgicals manufactures 26 patterns for urethral, prostatic, renal and bladder work, in German stainless steel and CE marked and built under ISO 13485. Compare the full range in the grid below.
Calibration and Dilation Are Not the Same Procedure
Calibrating a urethra and dilating one are different procedures, and the instruments are not interchangeable. A bougie à boule carries a bulbous head on a slender shaft: it is passed to find the point at which the lumen narrows, and because the bulb measures rather than stretches, properly performed calibration does not dilate the urethra and carries correspondingly little risk. That distinction matters clinically, because a stricture should be assessed before it is treated.
A sound does the opposite. It is solid, tapered and passed in ascending sizes to stretch the lumen open, and each pass is a therapeutic act rather than a measurement. Van Buren Urethral Sounds carry the curved male pattern, following the urethra through the penile segment, the bulbar curve and the membranous and prostatic urethra to the bladder neck. Mccrea Female Sounds and Female Catheters are shorter and straighter, because the female urethra has no equivalent curve to follow. We supply every pattern at MOQ 1.
French Sizing, and What to Do When Nothing Passes
Size in urology is expressed in French, and the conversion is fixed: one French is one third of a millimetre of outer diameter, so 8 Fr is 2.67mm, 24 Fr is 8.00mm and 30 Fr is 10.00mm. A normal penile urethra calibrates at around 30 Fr, with the glans and fossa navicularis narrower at under 25 Fr, and dilation proceeds in 2 Fr steps rather than jumps.
Where a stricture is too tight for any sound to pass, the filiform and follower system takes over. A fine flexible filiform is negotiated through the narrowing first and left in place as a guide, and progressively larger followers are then threaded over it, so the dilator is always tracking a known path rather than searching for one. Lefort Urethral Sounds and Jewett Urethral Sounds cover that end of the range, with Walther Dilator Catheter and Wire Mandrins supporting catheter placement.
Prostatectomy, Renal and Bladder Instruments
Beyond the urethra the range covers open urological work. Prostatectomy needs both traction and exposure: Lowsley Prostatic Tractors position the prostate from within the urethra, and Young Anterior, Bulb, Bifid and Lateral Retractors hold the perineal exposure open around it. Prostatectomy clamps control the capsular bed once the gland is enucleated.
Renal and bladder work has its own instruments. Randall Kidney Stone Forceps carry cupped fenestrated jaws for retrieving calculi from the pelvis and calyces intact, Gil Vernet Renal Sinus Retractor opens the sinus for pyelolithotomy, and Herrick Kidney Pedicle Clamp secures the vascular pedicle. Masson Judd Bladder Retractor holds the bladder open from above, and Campbell Suprapubic Trocar and Cannula establishes suprapubic access. Vasectomy is served by No Scalpel Vasectomy Forceps, the Fixator Ring Clamp and Sanders Vasectomy Forceps.
Material, Reprocessing and Certification
Every pattern is forged from German stainless steel and passivated for corrosion resistance across repeated cycles. On instruments that enter the urethra the inspection point is the entire working surface, not just the tip: run a gloved finger along the full length of every sound and bougie and confirm it is smooth and unmarked, because urethral mucosa is thin and a burr anywhere on the shaft will score it on withdrawal as readily as on insertion. Sight down each shaft to confirm the curve is true, since a bent sound no longer follows the anatomy it was shaped for, and confirm size markings are still legible. Clean immediately with a neutral-pH enzymatic solution, flushing every cannula and lumen, then rinse with deionised water and dry fully before autoclaving at 134°C.
These are Class I reusable devices, CE marked and built under ISO 13485, with a one-year warranty. We ship at MOQ 1 with free shipping over $99, and OEM production is available. See Surgical Forceps for the wider forceps range, or browse all Surgical Instruments. Talk to us about OEM terms.
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