This study aims to evaluate the necessity and effectiveness of using low molecular weight heparin (LMWH) for prophylaxis in the postoperative period in patients who underwent lobectomy due to malignancy, using thromboelastography.Blood samples taken from the patients before low molecular weight heparin prophylaxis (preoperative), before prophylaxis in the postoperative period (postoperative day 1) and after the start of postoperative prophylaxis (postoperative day 3) will be examined by thromboelastography.

General characteristics of the patients such as age, gender, presence of comorbidities, smoking, type of operation and approach applied, operation duration, TEG measurements and postoperative complication development were recorded with case forms.

Inclusion Criteria:

• Patients who underwent lobectomy with thoracotomy or videothoracoscopy (VATS) due to malignancy (primary or secondary lung cancer)

Exclusion Criteria:

• Patients with a known diagnosis of bleeding or coagulation disorders
• Patients receiving anticoagulant and antiplatelet therapy in the preoperative period
• Patients who developed perioperative bleeding and therefore underwent perioperative blood and blood product replacement

Patients who underwent lobectomy due to malignancy