The HEMSTOP preoperative hemostatic assessment questionnaire is a tool designed to evaluate the risk of bleeding disorders in patients based on seven key questions about their bleeding history and family medical background. Each response contributes to a precise scoring system that aids in determining the need for perioperative care.

The questionnaire includes the following questions:
- Have you had bruises or hematomas larger than 2 cm without trauma or severe bruising after minor trauma?
- Have you consulted a doctor or received treatment for prolonged or unusual bleeding, such as nosebleeds or minor wounds?
- Have you ever consulted a doctor or received treatment for heavy or prolonged menstrual periods?
- Did you experience excessive bleeding during or after surgery?
- Have you required medical or dental consultation due to prolonged bleeding after a tooth extraction?
- Did you experience prolonged or excessive bleeding after childbirth?
- Does your family have a history of coagulation diseases, such as hemophilia or von Willebrand disease?

For each "Yes" response, 1 point is awarded, while a "No" response yields 0 points. The cumulative score ranges from 0 to 7, corresponding with the level of attention required in a perioperative setting.

The interpretation of the score is direct:
- A score of 2 or higher triggers a recommendation for perioperative hemostatic precautions. This is supported by the system’s high sensitivity (89.5%) and specificity (98.6%) in predicting bleeding disorders.
- Conversely, if the score is below 2, no specialized perioperative hemostatic precautions are required.

This evaluation method assists healthcare providers in identifying patients who might need measures to prevent excessive bleeding, based on personal and familial bleeding history. The integration of sensitivity and specificity metrics ensures robust and reliable risk assessment. The results promptly inform clinical decision-making by providing a score and accompanying interpretation, aiding both the patient and medical professional prior to surgery.

The HEMSTOP is a preoperative hemostatic assessment questionnaire. This calculator is used in the patient population undergoing surgery, specifically to predict the risk of perioperative bleeding. The HEMSTOP questionnaire is a valuable tool for clinicians to identify patients at high risk of bleeding complications, thus allowing for appropriate preoperative planning and management. It includes questions about personal and family history of bleeding, medication use, and other factors that may affect hemostasis. The exclusion criteria for its use would be patients who are not undergoing surgery, or those who have already been diagnosed with a bleeding disorder, as the questionnaire is designed to identify undiagnosed risk.