Rakta Stambhana and Haemostasis: A Classical Ayurvedic Review of Blood Clotting Mechanism Through the Lens of Rakta Dhatu Physiology

Abstract

Background: Blood coagulation is a fundamental physiological process essential for survival. While modern haematology defines haemostasis through platelet aggregation, coagulation cascade, and fibrin formation, Ayurveda conceptualises blood clotting through the integrated framework of Rakta Dhatu physiology, Dosha dynamics — particularly Pitta-Rakta sambandha — Vata's role in vascular tone, and the astringent (Kashaya), cold (Sheeta), and light (Laghu) properties of haemostatic drugs. The concept of Rakta Stambhana (haemostasis) in Ayurveda encompasses primary haemostasis, secondary coagulation, and fibrinolytic control through a Doshic paradigm. Methods: A systematic classical textual review was conducted across Charaka Samhita, Sushruta Samhita, Ashtanga Hridayam, Ashtanga Sangraha, Sharangadhara Samhita, and Bhavaprakasha with specific focus on Rakta Dhatu nirukti (etymology), Rakta Vaha Srotas, Raktapitta (haemorrhagic disorders), Rakta Stambhana dravyas (haemostatic drugs), and Kashaya Rasa pharmacology. Standard commentaries of Chakrapani, Dalhana, and Arunadatta were referenced. Results: The Ayurvedic haemostatic mechanism operates through three primary pathways: (1) Vata (particularly Vyana Vata) mediated vascular contraction equivalent to primary vasoconstriction; (2) Ranjaka Pitta and Pachaka Pitta modulation of Rakta fluidity analogous to coagulation cascade; and (3) Kashaya Rasa-mediated Samgraha (contraction and aggregation) equivalent to platelet plug formation and fibrin cross-linking. Specific haemostatic drugs with documented Rakta Stambhana action include Lodhra, Dhataki, Priyangu, Mocharasa, and Laksha. Discussion: The Ayurvedic framework of blood clotting demonstrates sophisticated correlation with modern haemostatic mechanisms. The role of Kashaya Rasa aligns with the procoagulant properties of tannins. Sheeta Virya drugs parallel the use of cold in vasoconstriction. Vata-Rakta relationship reflects the neurohumoral regulation of platelet aggregation. The Raktapitta pathology parallels disseminated intravascular coagulation (DIC) and haemophilic conditions. Conclusion: Ayurveda's conceptualisation of Rakta Stambhana provides a holistic, clinically applicable framework for haemostatic management that integrates pharmacological, dietary, and constitutional approaches. The correlation between classical Doshic mechanisms and modern coagulation physiology reveals the depth of classical Ayurvedic understanding of blood physiology.