Pregnant patients in the postoperative period are at particularly high risk for DVT and thromboembolism due to the combined effects of surgery and pregnancy-related hypercoagulability. This risk is further elevated by factors such as prolonged immobility, tissue trauma, and underlying maternal conditions like obesity or thrombophilia. As a result, all pregnant patients should receive appropriate perioperative thromboprophylaxis unless contraindicated. Mechanical prophylaxis, such as graduated compression stockings or intermittent pneumatic compression devices, is recommended for all patients. Pharmacological prophylaxis with low molecular weight heparin (LMWH) or unfractionated heparin may be indicated in higher-risk patients. Heparin is preferred over warfarin due to its safety profile in pregnancy, as it does not cross the placenta and, therefore, poses no risk of teratogenicity or fetal bleeding. When neuraxial anesthesia or analgesia is part of the plan, time the heparin around the block per the ASRA guidelines: with prophylactic LMWH, place the needle or remove the catheter at least 12 hours after the last dose, give the first postoperative dose no sooner than 12 hours after needle placement, and wait at least 4 hours after catheter removal before the next dose; with treatment-dose LMWH, the interval before the block is 24 hours.
Special Considerations for Pain Management and Recovery
Certain situations may require special considerations for pain management and recovery in pregnant patients. For example, in patients undergoing neuroanesthesia for intracranial or spinal surgery, the use of regional techniques and careful patient positioning may be challenging due to the anatomical changes of pregnancy. Similarly, for patients undergoing cardiac surgery with cardiopulmonary bypass, postoperative care must address the specific risks associated with hypothermia, hemodilution, coagulation disturbances, and non-pulsatile flow that can impact both the mother and fetus.
In these cases, collaboration with a multidisciplinary team, including obstetricians, anesthesia providers, surgeons, and neonatologists, is essential to ensure comprehensive care and optimal outcomes. The obstetric team should be involved in all stages of perioperative planning and care, including decisions about pain management, fetal monitoring, and preparation for potential obstetric emergencies.
