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Kelly Clamp

Ratcheted ring-handled hemostat with transverse serrations on only the distal half of the jaw — the workhorse general-purpose hemostat and blunt dissector on every open reconstructive-urology and urogynecology tray. Available in straight and curved configurations; the curved Kelly is the variant in daily use. Distinguished from the otherwise-similar Péan by serration length (Kelly = distal half only; Péan = full jaw) and from the mosquito (Halsted) by jaw bulk (Kelly is bigger, for moderate-caliber vessels and bulk hemostasis).[1]

Design​

  • Jaws: moderately curved (or straight), transverse serrations on the distal half of the jaw only — proximal half is smooth.
  • Tip: blunt; no interlocking tooth (the feature that separates the Kelly from the Kocher).
  • Mechanism: ring-handled box lock with a multi-position ratchet.
  • Length: standard 14 cm (5.5 in); long Kelly 20 cm (8 in) for deeper pelvic exposure.
  • Material: surgical-grade stainless steel.

Why the Partial Serration Matters​

The smooth proximal jaw gives the Kelly a meaningfully more delicate distal-tip feel than the Péan (full transverse serrations) or the Crile (full transverse serrations, no curve). For small-to-moderate vessels and for blunt-tissue-plane development, the partial serration provides enough grip to hold a bleeder while permitting a less crushing close than a Péan or a Kocher. It also makes the Kelly the standard tip for the "spread to dissect" blunt-dissection maneuver, where two opposed jaws part tissue planes along a vessel or pedicle.

Reconstructive-Urology and Urogyn Uses​

  • Hemostasis on small-to-moderate bleeders during open RU work — branches of the dorsal venous complex (where a vascular clamp is not yet needed), small vesical / vaginal-cuff bleeders, perforator bleeders during flap harvest, scrotal vessels during IPP / AUS / hydrocelectomy / varicocelectomy, and inguinal vessels during groin dissection.
  • Blunt dissection along anatomic planes — peri-urethral and peri-prostatic dissection, retropubic space development, vagino-vesical and recto-vaginal plane creation during sling, sacrocolpopexy, and fistula repair, mesenteric-window development during open diversion.
  • Pedicle clamping before ligation when a heavier Péan or Kocher is more than the pedicle requires — ovarian branches, vasal stumps, small uterine pedicles in adjunctive hysterectomy.
  • Suture and drain control — clamping the cut end of a ligature, holding a suture-end mid-knot, securing a Penrose or red-rubber drain.
  • Tissue-plane traction during dissection — leaving the locked Kelly on a cut tissue edge as a pendant weight for traction.

Liver Surgery Context — Kellyclasia / Clamp-Crush​

Outside RU, the Kelly is most famous as the working instrument of the clamp-crush technique for hepatic parenchymal transection ("Kellyclasia" or "Kelly's clamp method"). Liver parenchyma is progressively crushed with a small Kelly to expose vascular pedicles and bile ducts, which are then individually ligated and divided. The technique evolved from earlier finger-fracture transection and remains a standard, low-cost option for hepatic resection.[2][3] A 2026 Cochrane review found insufficient high-quality evidence that bipolar coagulation devices outperform clamp-crush for elective liver resection.[2] Mentioned here because it is the canonical demonstration of a Kelly used for graded controlled crushing rather than simple hemostasis — the same principle that governs many of the maneuvers above.

Technique​

  • Grip: thumb-and-ring-finger through the rings, index along the shank.
  • Blunt dissection (the "spread"): insert the closed jaws along the anatomic plane, then open against the tissue to part it. Closing again with a small bite picks up a bleeder if one is encountered.
  • Hemostasis: tip-only purchase on the bleeder, first or second ratchet — full crush is rarely needed for the small vessels the Kelly is designed for. Tie below the clamp, or release and cauterize.
  • Match the layer: drop down to a mosquito for fine vessels; step up to a Péan for large pedicles; switch to a Kocher when an interlocking tip tooth is needed.

Distinctions from Adjacent Hemostats​

ClampSerrationsTip toothBest fit
KellyDistal half, transverseNoModerate vessels, blunt dissection, suture/drain control
PéanFull jaw, transverseNoLarger pedicles, more aggressive grip
CrileFull jaw, transverse (often straight)NoHemostasis, similar to Péan but straighter geometry
Mosquito (Halsted)Full jaw, fine, narrow profileNoFine vessels, delicate hemostasis
Mixter (right-angle)Variable, right-angle jawNoTunneling around vessels and pedicles
KocherFull jaw + 1×2 tip toothYesFascia, dense scar, pedicles for ligation

Historical Context​

Named for Howard Atwood Kelly (1858–1943), pioneering gynecologic surgeon and one of the "Big Four" founding professors of the Johns Hopkins University School of Medicine (alongside Osler, Halsted, and Welch). Kelly's contributions to gynecologic and pelvic surgery — the Kelly plication for SUI, the Kelly air cystoscope, and the formalization of gynecologic operative training — make him a foundational figure for the reconstructive-urology and urogynecology lineage that uses his clamp every day.[1]

See also: Péan, Kocher, Allis, Babcock.

References​

1. DuBose JJ, Feliciano DV. "Howard Atwood Kelly (1858–1943) and the Kelly clamp." Am Surg. 2024;90(4):521–2. doi:10.1177/00031348221129513

2. Kopljar M, Pavić R, Madžar Z, Žiger T. "Bipolar coagulation techniques versus the clamp-crush technique for elective liver resection." Cochrane Database Syst Rev. 2026;1:CD016320. doi:10.1002/14651858.CD016320

3. Ercolani G, Ravaioli M, Grazi GL, et al. "Use of vascular clamping in hepatic surgery: lessons learned from 1260 liver resections." Arch Surg. 2008;143(4):380–7. doi:10.1001/archsurg.143.4.380