Climbing chalk is widely used by rock climbers and athletes to improve grip. It has been observed that climbers sometimes apply magnesium carbonate chalk to small wounds to stop bleeding, suggesting that climbing chalk may exhibit hemostatic properties useful for small cuts and scrapes. This study aimed to investigate and compare the effects of different types of climbing chalk on prothrombin time (PT) and activated partial thromboplastin time (aPTT).
Methods
Three types of climbing chalk were randomly selected for comparative analysis of hemostatic properties, with talcum powder used as a negative control. PT and aPTT testing were conducted on normal plasma samples containing varying concentrations of climbing chalk (from 0.125 mg/mL to 4 mg/mL). Statistical analyses of the results were performed using two-tailed t-tests, Welch's analysis of variance (ANOVA), and Games-Howell post-hoc analysis.
Results
Results indicated that climbing chalk had no significant effect on PT but did significantly reduce aPTT compared to the negative control. Additional analyses revealed significant differences in aPTT results between different types of chalk and between higher and lower concentrations of chalk.
Conclusions
Magnesium carbonate-based climbing chalks appear to have a procoagulant effect on hemostasis, likely by affecting the intrinsic pathway of the coagulation cascade. While further research is needed to better understand its coagulative properties, climbing chalk shows potential as a hemostatic agent for minor wounds in wilderness medicine.
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