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NCLEX-PN · Reduction of Risk Potential · 6 min read

Postoperative Bleeding, Infection, Clots and Sedation

In this lesson you will
  • Identify early clinical indicators of postoperative hemorrhage, infection, venous thromboembolism, and opioid-induced sedation.
  • Differentiate appropriate nursing actions and positioning for postoperative emergencies, including external hemorrhage, wound evisceration, and pulmonary embolism.
  • Apply the practical nurse's role in collecting focused data, maintaining client safety, reinforcing teaching, and reporting urgent changes to the registered nurse.

Recognizing and Responding to Postoperative Hemorrhage

Postoperative hemorrhage can occur externally as visible bleeding from the surgical site or internally within closed body cavities. Because bleeding can quickly compromise blood flow to vital organs, the practical nurse collects baseline and serial vital signs to detect hemodynamic trends. Tachycardia is often the earliest compensatory vital sign change indicating postoperative hemorrhage, as the heart beats faster to maintain cardiac output. A narrowing pulse pressure can also serve as an early sign of blood loss, whereas hypotension is generally a late sign that the client is entering hemorrhagic shock.

The practical nurse inspects the surgical dressing and checks underneath the client to detect pooled dependent drainage that might otherwise escape notice. When drainage is visible on a dressing, the practical nurse outlines it with a pen and records the date and time to track whether it is expanding. A sudden shift from light serosanguineous fluid to bright red drainage suggests active, fresh bleeding and requires prompt reporting to the registered nurse (RN). Similarly, rapid saturation of a surgical dressing within an hour is an urgent finding that demands immediate notification of the RN.

The nurse also monitors surgical drain output for changes in volume, color, and consistency, reporting any unexpected increases to the RN. In addition to monitoring dressings, the nurse watches for systemic signs of blood loss. Compensatory vasoconstriction can cause pallor and cool, clammy skin, while reduced tissue perfusion often makes the client restless. Urine output below 30 mL per hour may indicate decreased renal perfusion from hypovolemia, but it can have other causes, including postoperative urinary retention; promptly report the finding to the RN. If the client develops internal abdominal bleeding, the practical nurse may notice increasing abdominal girth, firmness, or rigidity. If overt external hemorrhage occurs, the practical nurse applies direct pressure with sterile gauze and alerts the RN immediately.

Exam tip. Do not wait for blood pressure to drop before suspecting bleeding. Tachycardia and a narrowing pulse pressure appear much earlier than hypotension. For external bleeding, your first action is applying direct pressure with sterile gauze, followed immediately by notifying the RN.

Common mistakes

  • Assuming a normal pulse oximetry reading rules out respiratory depression in a client receiving supplemental oxygen, which can mask hypoventilation.
  • Massaging a painful, swollen calf or performing Homans sign, both of which are unsafe or unreliable practices that can dislodge a deep vein thrombosis.
  • Attributing every low-grade fever within the first 24 to 48 hours postoperatively to atelectasis instead of recognizing it as a possible normal inflammatory response to surgery.
  • Assuming naloxone administration permanently resolves opioid toxicity; naloxone can wear off before the opioid does, leading to recurrent respiratory depression.

Key points

  • Tachycardia and a narrowing pulse pressure are early signs of postoperative hemorrhage, whereas hypotension is a late sign of shock.
  • Rapid saturation of a dressing within an hour, a sudden shift to bright red drainage, or urine output under 30 mL per hour requires immediate reporting to the RN.
  • Wound evisceration requires staying with the client, calling for help, notifying the RN, covering organs with sterile saline-moistened gauze, and placing the client in low Fowler position with knees bent.
  • A respiratory rate under 10 breaths per minute or difficult arousal warrants immediate action, airway support, calling for help, and preparing ordered naloxone, while continuing to check for recurrent depression.
  • Deep vein thrombosis may be asymptomatic or cause unilateral leg swelling, warmth, or pain; never massage a limb with suspected DVT, avoid Homans sign, and report new findings to the RN.
  • Sudden dyspnea, pleuritic chest pain, and tachypnea suggest a pulmonary embolism; immediately stop activity, position for comfort, apply oxygen per protocol or order, and alert the RN.
  • Prevention of venous thromboembolism includes early ambulation, active leg exercises, prescribed sequential compression devices with underlying skin checks at least every 8 hours or as policy directs, and ordered heparin prophylaxis with bleeding checks.

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Sample lesson: Vital Signs, Pulse Oximetry and Focused Data Collection

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Original lesson written for NCLEX-PN practice · updated October 31, 2026. Exam names are trademarks of their owners; tests.global is not affiliated with them.