Patented. Peer-reviewed. Trusted across 500+ surgeries.
The Shira 3-Jaw Clamp is the only microvascular approximator clamp in the world with three jaws, protected by Shira's patent. It is the result of translational research at IIT Madras, validated in three peer-reviewed publications including a randomised controlled trial, and used at leading microsurgery centres including AIIMS, Apollo, Fortis, Max, Medanta and Aster.
What surgeons experience with conventional 2-jaw clamps
Vessel wall folds inward (backwalling), obscuring the lumen
Clamp must be flipped to suture the posterior wall — adding time and risk
Adventectomy required to prevent tissue entrapment
OT light reflection off the clamp reduces visibility
Vessel slippage from clamp jaws
How the 3-Jaw mechanism solves each problem
Problem
3-Jaw Solution
Surgical Benefit
Backwalling / lumen obscured
The third jaw holds the adventitia and everts the vessel wall, keeping the lumen open
0% backwalling — confirmed in published results (vs 30.8% with Acland® clamps, PRS 2022)
Posterior wall suturing requires clamp flip
Everted lumen gives direct posterior wall access
Clamp flip eliminated — no position change needed (RCT, JPRAS 2023)
Adventectomy needed
Third jaw grips the adventitia instead of trimming it
Minimal adventectomy — adventitia is used to evert the vessel
Anastomosis time
Faster set-up, no flip, minimal adventectomy
2× faster — about 50% less suturing time in both veins and arteries (RCT, JPRAS 2023)
OT light reflection
Black anti-reflective coating on all jaw surfaces
Zero glare — easy to identify the clamp under the microscope
Vessel slippage
Micro-grit gripping surface on jaw faces
Secure grip at calibrated closing pressure
Clinical validation
Randomised controlled trial (30 patients, 60 anastomoses): suturing time roughly halved — artery 15.9 vs 29.8 min, vein 16.6 vs 33.4 min vs Acland® clamps (p<0.001); no clamp flipping; assistant needed in 2 of 15 vs 14 of 15 cases; flap survival 93.3% in both groups. Journal of Plastic, Reconstructive & Aesthetic Surgery, 2023.
Trainee study (25 anastomoses): 0% backwalling vs 30.8% with Acland® clamps; 0% clamp flips vs 38.5%; anastomosis time 20.8 vs 32.3 min (p=0.007). Plastic and Reconstructive Surgery, 2022.
Technique report: first clinical description of the 3-jaw eversion technique. Journal of Plastic, Reconstructive & Aesthetic Surgery, 2022.
Dr. Aniket Dave (Ahmedabad): 500+ surgeries using the Shira 3-Jaw Clamp
Engineering specifications
Calibrated closing pressure — sufficient and consistent grip without over-compression
Black anti-reflective coating on all jaw surfaces
Micro-grit gripping surface to prevent vessel slippage
Fits Shira Clamp Sterilization Case (7-clamp capacity)
Compatible with Shira Clamp Applicator (asymmetric jaw design required for 2VV/2AA sizes)
Clamp sizes
Size
Vessel diameter
Calibrated closing pressure
1A / 1V
0.4–1.0 mm
18–21 g
2AA / 2VV
0.6–1.5 mm
29–32 g
3AA / 3VV
1.0–2.25 mm
42–45 g
HDD
1.5–3.5 mm
76–80 g
RDD
3–4 mm
135–145 g
A = artery, V = vein.
If there is no adventitia
The 3-Jaw Clamp can be used exactly like a 2-jaw clamp when the vessel has minimal adventitia — no technique change required.
ISO 13485 Certified · CDSCO Registered · MDA Malaysia Registered · Exported to 20+ countries
