8.4 Treatment Termination, Hemostasis & Post-Dialysis Assessment

Treatment Termination, Hemostasis & Post-Dialysis Assessment

The concluding phase of a hemodialysis session requires the same clinical rigor and technical skill as its initiation. Returning blood from the extracorporeal circuit back to the patient (rinseback), securing hemostasis at access puncture sites without compromising internal vascular patency, and evaluating post-treatment stability are primary nursing responsibilities. Inappropriate termination techniques risk vascular access thrombosis, severe blood loss, acute volume overload, or unheralded post-dialysis orthostatic syncope.

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Rinseback Procedure & Blood Restitution

At the end of the prescribed treatment, the extracorporeal bloodlines and dialyzer contain between 150 and 250 mL of blood. Reinfusing this volume into the patient is essential to prevent chronic iatrogenic blood loss and worsening anemia.

Principles of Extracorporeal Blood Volume Recovery

Blood restitution must be conducted systematically using sterile 0.9% normal saline while maintaining continuous visual oversight:

1. Halting Ultrafiltration & Dialysate Flow: Ultrafiltration is turned off, and dialysate flow is discontinued or placed into bypass to prevent further mass transfer.
2. Use the device-specified rinseback flow and sequence with continuous observation; speed is not a universal 150–200 mL/min rule.
3. Arterial Line Restitution: The arterial needle line is clamped, disconnected from the bloodline, and flushed with sterile saline if facility policy permits, or blood from the arterial access connector to the T-junction is cleared by introducing a saline flush from the primary infusion line.
4. Venous Circuit Displacement: Sterile normal saline is drawn from the administration bag through the arterial bloodline, passing through the blood pump segment, through the dialyzer hollow fibers, and down through the venous drip chamber, displacing the remaining blood column forward into the venous access needle.

Precautions Against Over-Rinsing & Fluid Bolusing

Use the device-specific rinseback endpoint, volume and air-protection procedure. Circuit appearance supports observation but does not replace the labeled sequence or justify passing air toward the patient. Over-rinsing the circuit infuses excessive normal saline into the patient. Forcing an extra 200 to 400 mL of saline at treatment completion directly undermines ultrafiltration, elevates post-dialysis blood pressure, and promotes rapid interdialytic fluid accumulation. Furthermore, air-assisted rinseback methods carry catastrophic risks of air embolism and are strongly discouraged in favor of closed-loop saline displacement.

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Needle Withdrawal & Non-Occlusive Manual Hemostasis

Securing hemostasis following access needle removal requires understanding vascular anatomy and fluid dynamics.

Vascular Wall Protection During Needle Removal

The Cardinal Rule of Needle Removal: The dialysis nurse must NEVER apply pressure over the cannulation site while any portion of the needle remains inside the vascular lumen.

Applying pressure while withdrawing the needle forces the sharp, beveled cutting edge of the 14- to 17-gauge needle directly into the vessel's posterior and lateral intimal walls. This produces intimal tearing, vessel wall laceration, tract shearing, and immediate hematoma formation. Extensive intradialytic heparinization amplifies this bleeding into the surrounding subcutaneous tissue, accelerating access stenosis and pseudoaneurysm formation.

Correct Withdrawal Technique:

1. Carefully loosen and remove all adhesive retention tapes while stabilizing the needle wings.
2. Place a sterile gauze pad or hemostatic sponge lightly over the insertion site without applying downward pressure.
3. Instruct the patient to remain completely still.
4. Withdraw the needle swiftly and smoothly at the exact same angle of original cannulation.
5. The instant the needle tip clears the skin surface, immediately apply direct, gentle digital pressure with two fingers.

Two-Finger Digital Compression Technique

Fistula and graft cannulation punctures span two separate anatomical openings: the puncture in the skin and subcutaneous tissue, and the puncture in the vessel wall itself. Because needles enter at an angle (20 to 35 degrees for AV fistulas, 45 degrees for AV grafts), the cuticular puncture and the vascular puncture do not align vertically. Apply focused pressure that controls bleeding from the puncture track while preserving access flow. Skin and vessel entry points may differ; finger placement depends on the actual access and needle path rather than a universal spacing requirement.

Maintaining Laminar Flow: Thrill & Bruit Preservation

Apply focused pressure until bleeding stops, with reassessment of flow; the required duration varies.

• Non-Occlusive Pressure Principle: The force applied must be sufficient to stop blood from escaping the puncture track while maintaining continuous blood flow through the internal vascular conduit. If the vessel lumen is compressed completely shut, blood stasis occurs across the entire fistula or graft.
• Check that flow remains present during hemostasis and reassess after pressure is released; do not assume a fixed pressure interval proves safety.
• Avoiding "Peeking": Lifting the gauze pad periodically to see if bleeding has stopped disrupts nascent platelet plugs and fibrin polymers, restarting the clotting cascade and significantly lengthening total bleeding time.

Hazards of Mechanical Clamping Devices

Mechanical clamping devices (spring-loaded clamps, C-clamps, and tight circumferential elastic wraps) exert unmonitored, rigid pressure over vascular access sites. KDOQI clinical practice guidelines strongly advise against using mechanical access clamps:

• Thrombosis Risk: If a patient moves their arm or if the clamp shifts, the device frequently exerts occlusive force that obliterates internal blood flow. In a heparin-cleared, post-dialysis patient with low blood pressure, occlusive clamping produces complete access thrombosis within minutes.
• Intimal Hyperplasia: Focal mechanical pressure crushes the endothelial lining of the fistula or graft, inducing reactive intimal hyperplasia and outflow stenosis.
• Mechanical pressure devices, if permitted, require access-specific policy, direct monitoring and avoidance of occlusion; do not infer a universal device rule for every fistula or graft.

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Assessment & Management of Prolonged Post-Dialysis Bleeding

Puncture site bleeding that persists beyond 20 to 30 minutes despite continuous manual pressure is abnormal and demands immediate clinical investigation.

Differential Diagnosis of Hemostatic Failure

Progressive Clinical Interventions & Hemostatic Dressings

When bleeding persists beyond 20 minutes:

1. Re-evaluate Compression Technique: Verify that pressure is applied precisely over both the vascular and skin puncture sites and is non-occlusive.
2. Apply Advanced Hemostatic Dressings: Replace plain cotton gauze with calcium alginate dressings, oxidized regenerated cellulose, or topical thrombin-collagen sponges. These biomaterials accelerate coagulation by releasing calcium ions or providing an active collagen scaffolding that binds platelets directly.
3. Protamine Sulfate Reversal: If systemic heparinization remains markedly unreversed and bleeding is severe, the clinician may order protamine sulfate. Dose accounts for heparin still present and time since administration; verify the actual product and order, administer slowly and monitor for hypotension or severe reactions. A textbook ratio is not an independent nursing order.
4. Vascular Access Surgical Referral: If prolonged bleeding recurs across multiple sessions, the nurse must initiate a referral for diagnostic imaging (fistulogram or duplex ultrasonography). The access team determines imaging and treatment of a clinically significant lesion; prolonged bleeding alone does not authorize independent angioplasty or prove one cause.

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Comprehensive Post-Dialysis Nursing Assessment

The patient must undergo a complete post-dialysis nursing assessment prior to being discharged from the clinical station.

Post-Dialysis Hemodynamic & Orthostatic Evaluation

Assess post-treatment vital signs, symptoms and safe mobility. Obtain orthostatic measurements when indicated and safe, with assistance to prevent falls:

• Orthostatic Hypotension Assessment: A decline of $\ge 20\text{ mmHg}$ in systolic blood pressure or $\ge 10\text{ mmHg}$ in diastolic pressure upon standing indicates significant intravascular volume depletion. Post-dialysis orthostasis is exacerbated by rapid ultrafiltration, autonomic neuropathy (common in diabetic ESRD), antihypertensive medications, and intradialytic eating.
• Clinical Response: If orthostatic symptoms (dizziness, diaphoresis, lightheadedness, pallor) occur, the nurse must immediately return the patient to a recumbent position with lower extremities elevated when tolerated. The nurse rechecks vital signs, reassesses fluid removal relative to dry weight, and administers a physician-ordered normal saline bolus (100 to 250 mL) if volume depletion is symptomatic and severe.

Post-Treatment Weight Verification Against Dry Weight

The patient must be weighed on the same calibrated clinic scale wearing equivalent clothing. The achieved post-dialysis weight must be compared directly against the prescribed Estimated Dry Weight:

• Weight above target: May reflect retained fluid, actual intake, clothing/scale differences or a changing tissue weight. The nurse must assess the patient for persistent peripheral edema, pulmonary crackles, or hypertension, and consult the nephrologist regarding adjustive ultrafiltration orders.
• Weight Below Dry Weight ($> 0.5\text{ kg}$ under EDW): Indicates excessive fluid extraction. The patient is at high risk for severe delayed muscle cramps, vascular access thrombosis, and orthostatic syncope after leaving the clinic. The nephrologist may re-evaluate the dry weight upward.

Access Site Inspection & Integrity Verification

The vascular access must be inspected before applying discharge dressings:

• Confirm complete hemostasis without active oozing or expanding subcutaneous hematoma.
• Auscultate and palpate the entire length of the conduit to verify a strong, continuous thrill and low-pitched, blowing bruit.
• Apply clean, sterile adhesive bandages or gauze wraps. Gauze wraps must be applied loosely and never circumferentially wrapped around the limb, as circumferential tape acts as a tourniquet that induces access thrombosis.

Discharge Patient Education & Delayed Bleeding Precautions

Before discharge, the certified hemodialysis nurse must reinforce essential self-care instructions:

Teach the individual activity plan. Brisk or uncontrolled access bleeding requires focused pressure and immediate emergency help rather than waiting twenty minutes.

• Infection Monitoring: Advise the patient to monitor the access site daily for signs of localized infection, including erythema, warmth, purulent drainage, induration, or fever.

Use the device-specific rinseback sequence and include returned saline in intake. Rinseback speed and volume are not universal across machines. Maintain direct focal pressure until bleeding has stopped, checking that access flow persists; do not use a fixed interval as proof of hemostasis. Recheck before discharge, especially after standing. Patient activity restrictions depend on the access and clinical plan rather than an automatic ten-pound limit for every mature access. Sudden brisk bleeding at home requires pressure and immediate emergency calling, not waiting for a routine clinic callback.

Sources checked 2026-10-10: KDOQI 2019 vascular access

Device source checked 2026-10-11: Fresenius operator manuals, including 2008T revision AE. Examples explain principles; the actual device and chemical labeling govern operation.