A patient has undergone mitral valve replacement having persistent bleeding from surgical incision in the early postoperative period, which drug will be administered?

Appeared in: BCCL kharkhanda Staff Nurse - 2015

Explanation

Patients undergoing mitral valve replacement receive high doses of heparin to prevent blood from clotting in the cardiopulmonary bypass circuit.
Persistent bleeding from the surgical site in the early postoperative period is a classic sign of residual heparin effect or heparin rebound.
Protamine sulfate is the specific pharmacological antagonist (antidote) for heparin.
It works by binding with the heparin molecule to form an inactive complex, thereby neutralizing its anticoagulant properties and allowing normal hemostasis to resume.

Option B: Vitamin C (ascorbic acid) is a vitamin essential for collagen synthesis and plays a role in long-term wound healing, but it has no immediate effect on the coagulation cascade or reversing anticoagulant drugs.
Option C: Quinidine sulphate is a Class IA antiarrhythmic agent used to treat atrial fibrillation and other heart rhythm disturbances. It has no role in managing bleeding or coagulation.
Option D: Warfarin is an oral anticoagulant that works by inhibiting Vitamin K-dependent clotting factors. Administering an anticoagulant to a patient who is already bleeding would be extremely dangerous and would worsen the hemorrhage.

Clinical Relevance

Nursing practice connection: Use the key finding related to Pharmacological management of postoperative hemorrhage after cardiac surgery to guide bedside assessment, documentation, and the next nursing action.
A key nursing responsibility in the cardiac ICU is vigilant monitoring for postoperative bleeding. This includes measuring chest tube output, assessing incision sites, and trending vital signs and lab values (e.g., hemoglobin/hematocrit, coagulation profiles).
When administering protamine sulfate, nurses must do so slowly (e.g., over 10 minutes) to prevent a rapid drop in blood pressure, a known adverse effect. The patient's blood pressure and heart rate must be monitored closely during and after the infusion.
What if? If the patient was bleeding due to an overdose of warfarin (not heparin), the correct antidote would be Vitamin K (phytonadione), and in severe cases, fresh frozen plasma (FFP) or prothrombin complex concentrate (PCC), not protamine sulfate.

How to Approach the Question

First, identify the core clinical scenario: a patient is bleeding after a major heart surgery (mitral valve replacement).
Next, connect the type of surgery to the standard medications used. Open-heart surgery requires cardiopulmonary bypass, which necessitates systemic anticoagulation with heparin.
Then, link the clinical problem (persistent bleeding) to the most likely pharmacological cause (residual effect of intraoperative heparin).
Recall the specific antidote for the suspected medication. The antidote for heparin is protamine sulfate.
Finally, evaluate the other options to confirm they are inappropriate. Vitamin C is for healing, Quinidine is for arrhythmias, and Warfarin is an anticoagulant that would worsen bleeding. This process of elimination solidifies protamine sulfate as the only correct answer.

Concept Tested & Keywords

Concept Tested: Pharmacological management of postoperative hemorrhage after cardiac surgery.
Stem keywords: mitral valve replacement, persistent bleeding, early postoperative period
Lead-in keywords: which drug
Clinical cues: The patient has undergone a major cardiac surgery (mitral valve replacement), which implies the use of intraoperative heparin.
Clinical cues: The patient is in the 'early postoperative period' with 'persistent bleeding', pointing to a complication related to intraoperative anticoagulation.

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E6 Pharmacology Nursing Lilley 11e Part 2 pp. 108-110, 123-125

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