Hemostasis – Definitive Hemostasis
What is Definitive Hemostasis?
Definitive hemostasis refers to surgical or procedural techniques that ensure permanent cessation of bleeding by closing blood vessels or removing the cause of hemorrhage.
These are used in controlled surgical settings (elective or trauma surgery), after temporary control is achieved.
Principles
Goal: Achieve permanent control of bleeding, protect surrounding tissue, and avoid recurrence.
Techniques of Definitive Hemostasis
1. Mechanical Hemostasis
Ligation (Tying Off)
Gold standard in surgery
Involves tying a vessel with absorbable or non- absorbable suture
Indications: Arterial or venous bleeding
Can be done as:
- Simple ligature
- Transfixation ligature (needle passes through vessel wall for extra security)
Vascular Clamping
Temporary or permanent clamping of vessels using tools like:
- Kocher clamps
- Bulldog clamps
Often used in larger vessels (e.g., during aneurysm repair, vascular anastomosis)
Suturing
Bleeding tissue or vessel wall is stitched closed
Used in organ lacerations, vascular repair, or after tumor resection
Hemostatic Clips
Metal clips applied to small arteries or veins
Fast, useful in laparoscopic and endoscopic surgery
2. Thermal Hemostasis
Electrocoagulation
Uses electric current to cauterize and coagulate vessels
Types:
- Monopolar: current passes through tissue to a ground pad
- Bipolar: current flows between two tips of forceps, more precise
Used widely in laparoscopic and open surgeries
Laser Coagulation
High-energy light to cauterize bleeding vessels (used in specialized fields like ophthalmology or ENT)
Ultrasound- based Devices (e.g., Harmonic scalpel)
Simultaneous cutting and coagulation using ultrasonic energy
Low temperature - > vasoconstriction
3. Topical Hemostatic Agents
Chemical / Pharmacological Agents
Used when mechanical methods are insufficient or not applicable.
4. Physiological Hemostasis Support
In addition to surgical control:
Ensure normal coagulation status
Correct:
- Hypothermia
- Acidosis
- Coagulopathy
Use of:
- Fresh Frozen Plasma (FFP)
- Platelets
- Cryoprecipitate
- Vitamin K