How to Access an Implanted Port: Step-by-Step Clinical Procedure
Step-by-step clinical procedure for accessing an implanted port (port-a-cath): site assessment, non-coring needle selection, sterile technique, blood return confirmation, flushing, dressing, and deaccessing.
Guide
For clinicians
How to Access an Implanted Port: Step-by-Step Clinical Procedure
Accessing an implanted port (port-a-cath) is one of the most frequently performed vascular access procedures in oncology and long-term infusion care. Done correctly — with a non-coring needle, strict aseptic technique, and confirmed blood return — it is safe and comfortable. Done incorrectly, it risks septum damage, infiltration of vesicant drugs, and bloodstream infection. This guide is the step-by-step clinical reference.
Parent guide: Implanted Vascular Access Ports: Complete Clinical Guide · Central Venous Catheters: Complete Reference
Before You Begin
- Indication and order verified; patient identified with two identifiers.
- Site assessment: the pocket is intact, non-tender, and free of erythema, swelling, or breakdown. Skin breakdown or signs of pocket infection contraindicate access until evaluated.
- Coagulation status reviewed; allergies (chlorhexidine, lidocaine, adhesive) noted.
- Supplies: sterile port access kit, correct non-coring (Huber) needle, preservative-free normal saline in 10 mL-barrel syringes, 2% CHG/70% alcohol, sterile gloves, mask(s), transparent dressing.
Needle Selection
| Factor | Guidance |
|---|---|
| Type | Non-coring (Huber) only — never a standard hollow needle |
| Gauge | Match to therapy (e.g., 19–20 G for blood products/apheresis, 22 G for most infusions) |
| Length | Long enough that the hub sits flush without rocking (commonly 0.75–1.5 in by port depth/habitus) |
Step-by-Step Procedure
- Verify order, patient, device, allergies, and labs.
- Assess the port site; locate and gauge the septum depth.
- Hand hygiene, mask, gather supplies.
- Select the appropriate non-coring needle.
- Antisepsis: 2% CHG in 70% alcohol, 30-second friction scrub, full dry time.
- Stabilize the port in a triangle with the non-dominant hand.
- Insert the non-coring needle perpendicular (90°) through the center of the septum to the back plate.
- Confirm brisk blood return; flush with preservative-free saline without resistance or swelling.
- Flush, secure, dress (transparent dressing; support wings to keep hub flush); label.
- Deaccess at end of use: flush, lock per policy, withdraw with the safety mechanism, dress, document.
Troubleshooting
- No blood return, flushes easily: reposition patient, confirm seating; suspect fibrin sheath → thrombolytic per protocol, consider imaging. Do not infuse vesicants until confirmed.
- Cannot flush / resistance: do not force; suspect occlusion → assess and treat per Catheter Occlusion Management.
- Swelling or pain on flush: stop immediately — possible needle dislodgement or infiltration; reassess and follow extravasation protocol if a vesicant was given.
Infection Prevention
Port access is a sterile procedure governed by CLABSI maintenance-bundle principles: mask, hand hygiene, CHG antisepsis with full dry time, scrub-the-hub before every connection, and a clean transparent dressing changed per policy. See the CLABSI Maintenance Bundle.
Related Guides
- Implanted Vascular Access Ports: Complete Clinical Guide
- Flushing and Locking: The SASH Protocol
- CLABSI Maintenance Bundle
- Preparing for Port Placement (Patient Education)
References
- Gorski LA, et al. (2021). Infusion Therapy Standards of Practice (8th ed.). Journal of Infusion Nursing, 44(Suppl 1), S1–S224.
- Camp-Sorrell D, et al. (Oncology Nursing Society). Access Device Standards of Practice for Oncology Nursing.
- O’Grady NP, et al. (2011). Guidelines for the prevention of intravascular catheter-related infections. Clinical Infectious Diseases, 52(9), e162–e193.
Frequently asked questions
What needle is used to access a port?
A non-coring needle, commonly called a Huber needle, is used. Its deflected tip slices rather than punches the silicone septum, so it does not core out a plug of the septum the way a standard hollow needle would. The gauge is chosen for the therapy and the length so that the hub sits flush with the skin.
How do you confirm a port is accessed correctly?
Correct access is confirmed by brisk blood return on aspiration and by flushing preservative-free normal saline without resistance, swelling, or pain. If there is no blood return, troubleshoot before using the port — reposition the patient, confirm the needle is seated against the back plate, and consider a fibrin sheath or malposition.
How often should a port be flushed when not in use?
A port that is not being used is typically flushed and locked every 4 weeks per most institutional protocols, using saline and (where required) a heparin lock. Follow your facility policy, as some valved ports are saline-locked only.
What do you do if there is no blood return from a port?
Do not use the port until flow is established. Reposition the patient (raise arms, cough, lie down), confirm the needle is fully seated against the back plate and centered in the septum, and re-aspirate. Persistent absence of blood return with the ability to flush suggests a fibrin sheath and warrants a thrombolytic per protocol and possible imaging.