Discontinuing Treatment and Post-Access Care
Key Takeaways
- Discontinuation (rinseback) returns the patient's blood from the circuit using normal saline, following facility procedure and the access type; verify the treatment is complete or that early termination was ordered before stopping.
- For AVF/AVG needle removal: withdraw the needle along its insertion angle, then apply firm but non-occlusive pressure to the site with two-finger technique until hemostasis - enough to stop bleeding but not so much that the thrill/bruit disappears.
- Confirm hemostasis before applying the dressing; do not send a patient out with active bleeding or an unsecured dressing - prolonged bleeding may indicate over-anticoagulation or an access problem and must be reported.
- After hemostasis, reassess the access for a thrill (palpable buzz) and bruit (audible whoosh) per policy; loss of thrill/bruit, swelling, severe pain, or a cool/pale limb is reported promptly.
- Central venous catheter discontinuation stays within facility scope and demands strict asepsis and clamp safety because catheters carry high infection and air-embolism risk; any cap break, loose connection, drainage, redness, or fever is escalated.
Rinseback: Returning the Blood
Discontinuation ends treatment by returning the patient's blood from the extracorporeal circuit and disconnecting from the access. The blood return step is the rinseback: normal saline (0.9% NaCl) is used to push the patient's blood from the bloodlines back into them so it is not lost.
Before stopping, verify that the prescribed treatment time and UF goal are complete, or that an early termination has been ordered or approved by the RN/prescriber. The technician does not end treatment early on their own judgment.
Follow the exact facility sequence, but the safety constants are the same:
- Reduce the blood flow rate as directed before rinseback.
- Keep lines and needles secure until rinseback/disconnection is complete.
- Use saline (not air) to return blood - returning blood with air risks air embolism.
- Watch the venous chamber and air detector throughout the return.
The exam contrasts a correct saline rinseback with the dangerous error of allowing air to chase the blood back. The whole point of the saline return is to recover the patient's blood without introducing air.
Needle Removal and Hemostasis (AVF/AVG)
For an arteriovenous fistula (AVF) or graft (AVG), post-treatment care centers on safe needle removal and hemostasis (stopping the bleeding) without harming the access.
Step Order
- Confirm rinseback is complete and the access is ready to discontinue.
- Remove the needle along its original insertion angle - pull it out the way it went in, to avoid tearing the vessel wall. Do not press down on the site while the needle is still in the tissue (that drags the needle tip across the vessel).
- Immediately apply pressure over the puncture using the two-finger technique - one fingertip over the skin entry and one over the deeper vessel entry (they are not the same spot).
- Apply firm but non-occlusive pressure - enough to stop bleeding, but light enough that the thrill is still palpable. Occluding the access fully can clot it.
- Hold for several minutes (often ~10 minutes, longer if heparinized) until hemostasis is achieved.
- Confirm hemostasis before dressing, then apply the dressing without wrapping it circumferentially tight around the limb.
The Pressure Rule
| Too little pressure | Correct pressure | Too much pressure |
|---|---|---|
| Continued bleeding, hematoma | Bleeding stops; thrill still present | Bleeding stops but thrill lost; access can clot |
Prolonged bleeding after needle removal can mean over-anticoagulation (excess heparin), an aneurysm/access problem, or a missed deeper puncture. Do not send a patient out with active bleeding or an unsecured dressing. Notify the RN if bleeding is excessive, recurrent, or hard to control.
Access Reassessment and Catheter Care
After hemostasis, reassess the access per policy. A patent AVF/AVG has:
- a thrill - a palpable buzzing/vibration you feel with your fingertips over the access; and
- a bruit - a continuous whooshing sound you hear with a stethoscope.
Report promptly any of these: loss of the thrill or bruit (possible clotting), swelling, severe pain, redness, drainage, a cool or pale extremity, or a pulsatile/enlarging area (possible aneurysm). A newly absent thrill is a vascular-access emergency because the access may be clotting.
Central Venous Catheter (CVC) Discontinuation
Catheters carry high infection and air-embolism risk, so technicians must stay strictly within facility scope and policy. Key safety points:
- Maintain strict aseptic technique at every cap and connection - catheter hubs are a direct line to the bloodstream.
- Clamp the catheter before opening any connection; never leave a lumen open to air (air-embolism risk).
- Apply antimicrobial/heparin or citrate lock and new caps per policy.
- Escalate immediately for a broken or missing cap, loose connection, exit-site drainage, redness, swelling, fever, or catheter damage/migration.
Post-Discontinuation Wrap-Up
Finally, confirm the site is clean, dry, and dressed, the bleeding is fully controlled, and the patient is stable before transfer. The discontinuation is not complete until the access is secured, reassessed, and the relevant findings are documented and reported.
Anticoagulation and Bleeding Time
Most patients receive heparin during dialysis to keep the circuit from clotting, which means their blood does not clot normally for a while after treatment. This directly affects how long you must hold pressure to achieve hemostasis. A heparinized patient may bleed for 10 minutes or longer after needle removal, and a patient on extra anticoagulation or with a deep puncture may take longer still.
The exam-safe rules around bleeding:
- Do not rush the hold. Lifting your fingers to 'peek' too early restarts the bleeding and can dislodge the early clot.
- Do not occlude the access while holding - confirm the thrill remains.
- Re-bleeding after the dressing is applied is reported, not ignored; it may mean the hold was too short or the patient is over-anticoagulated.
- Excessive, recurrent, or oozing bleeding is reported to the RN, who may check the heparin dose or examine the access.
A patient must never leave the unit with an actively bleeding site or an unsecured dressing - this is a frequent, high-yield exam point.
Early Termination and Sequence Errors
If a treatment must end early (for a medical event or by order), the same rinseback and hemostasis steps apply, performed safely under direction - the technician does not skip blood return or shortcut needle removal because of time pressure. Two sequence errors the exam targets: applying pressure before the needle is fully out (which shears the vessel), and beginning blood return with air rather than saline (air-embolism risk). Performing the steps in the correct order - confirm completion or order, return blood with saline, remove the needle along its angle, then apply non-occlusive pressure - is what keeps discontinuation safe.
During rinseback at the end of treatment, what is used to return the patient's blood from the extracorporeal circuit, and why does the choice matter?
After removing a fistula needle, a technician applies so much pressure that bleeding stops but the thrill over the access can no longer be felt. What is the problem with this technique?
After dressing the access, the technician palpates the AVF and finds the thrill is now absent. What is the correct action?
While disconnecting a patient from a central venous catheter, the technician notices a cap is cracked and one lumen briefly opened to air. Which two risks are most directly involved, and what is the response?