# Point-of-care ClotPro thromboelastography to determine bleeding risk in two cats with factor XII deficiency

## TL;DR

Two cats with Factor XII deficiency showed prolonged clotting times but no bleeding risk, using a new point-of-care test called ClotPro.

## Contribution

The study confirms that FXII deficiency in cats does not increase bleeding risk despite prolonged clotting times.

## Key findings

- Both cats had prolonged aPTT and intrinsic pathway clotting time but normal clot strength.
- FXII deficiency was confirmed via ELISA, and no clinical bleeding was observed.
- ClotPro thromboelastography provided accurate coagulation assessment in feline FXII deficiency.

## Abstract

Factor XII (FXII) deficiency is a rare autosomal recessive genetic disorder in cats, leading to singular prolonged activated partial thromboplastin clotting time (aPTT) without increased bleeding risk. This case series describes two cats diagnosed with FXII deficiency using the ClotPro system, a point-of-care viscoelastic coagulation test. Both cats exhibited significantly prolonged aPTT and intrinsic pathway clotting time but maintained normal clot strength, as indicated by thromboelastography (TEG). FXII deficiency was confirmed through quantitative ELISA measurement. Despite prolonged clotting times, the cats did not demonstrate clinical bleeding, suggesting that FXII deficiency does not increase bleeding risk. However, larger controlled studies are necessary to further investigate the utility of TEG in cats with FXII deficiency or other coagulation disorders.

This study addresses the diagnostic challenges associated with FXII deficiency, a condition that can lead to misinterpretation of coagulation results and unnecessary treatments. It highlights the application of the ClotPro system in feline medicine, providing deeper insights into coagulation dynamics and confirming that FXII deficiency does not inherently increase bleeding risk despite prolonged clotting times.