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International Journal of Clinical Pharmacy

, Volume 39, Issue 2, pp 416–423 | Cite as

Polypharmacotherapy and blood products as risk factors for venous thromboembolism in postsurgical patients: a case–control study

  • Alenka Premuš Marušič
  • Daniel Petrovič
  • Aleš Mrhar
  • Igor LocatelliEmail author
Research Article

Abstract

Background After surgical procedures, patients are at high risk of developing venous thromboembolism, clinically manifested as deep vein thrombosis (DVT) or pulmonary embolism (PE). Objective To evaluate the influence of polypharmacotherapy, comorbidity, drug treatments, packed red blood cells application, adequacy of thromboprophylaxis, and patient characteristics on the occurrence of DVT or PE in postsurgical patients. Setting The surgical department at Murska Sobota General Hospital, Slovenia. Methods In this retrospective case control study, the records of 286 surgical patients were analysed: DVT or PE group (n = 144) and control group (n = 142). The number of prescribed drugs and drug–drug interactions were reviewed, together with prescription of low-molecular-weight heparins. The odds ratios (OR) of risk factors for DVT or PE were calculated using a multivariable logistic regression model. Main outcome measure Risk factors assessment for the occurrence of DVT or PE in surgical patients. Results Polypharmacotherapy (OR 2.02, 95% CI 1.03–3.96, p = 0.040) and packed red blood cells application (OR 3.44, 95% CI 1.46–8.10, p = 0.005) were associated with an increased risk of PE or DVT after surgery. Inadequate thromboprophylaxis with low-molecular-weight heparins significantly increased the likelihood of DVT or PE (OR 2.50, 95% CI 1.41–4.43, p = 0.002). There were no differences between the groups concerning the treatment with nonsteroidal anti-inflammatory drugs, benzodiazepines or antipsychotics. Conclusions Patients with polypharmacotherapy and patients receiving red blood cells should be monitored more closely after surgery as they are more likely to develop DVT or PE.

Keywords

Drug interactions Packed red blood cells Polypharmacotherapy Prevention Slovenia Venous tromboembolism VTE-prophylaxis 

Notes

Funding

No funding was received in support of this work.

Conflicts of interest

The authors have no conflicts of interest.

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Copyright information

© Springer International Publishing 2017

Authors and Affiliations

  1. 1.Murska Sobota General HospitalMurska SobotaSlovenia
  2. 2.Faculty of MedicineUniversity of LjubljanaLjubljanaSlovenia
  3. 3.Faculty of PharmacyUniversity of LjubljanaLjubljanaSlovenia

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