Patient Information: Fistula vs Graft vs Catheter
This guide explains the three types of dialysis access, including lifespan, advantages, risks, and expected outcomes.
ARTERIOVENOUS FISTULA (AV FISTULA)
This is the best and preferred dialysis access.
What is it?
A surgeon connects:
- An artery → directly to a vein
- Usually in the arm
- The vein enlarges and strengthens
- Needles are placed into this vein for dialysis
The fistula sits under the skin.
A fistula needs 2–4 months to mature before use.
Expected Outcomes – AV Fistula
Short-term (0–3 months)
- Maturation period
- Cannot be used immediately
- Some fistulas fail to mature (10–30%)
- May need angioplasty or revision
Possible early problems:
- Swelling
- Bruising
- Failure to mature
- Low flow
- Thrombosis
Intermediate (3 months – 2 years)
- Best functioning access
- Good dialysis flow
- Low infection risk
- Requires occasional maintenance
Possible issues:
- Stenosis
- Reduced thrill
- Needle difficulty
- Thrombosis
Long-term (2+ years)
Best long-term option.
Expected lifespan:
- 5–10 years common
- Some last >15 years
- Longest survival of all access types
Long-term complications:
- Aneurysm formation
- Stenosis
- Thrombosis
- High flow cardiac strain (rare)
Advantages of Fistula
✔ Longest lifespan
✔ Lowest infection risk
✔ Best dialysis quality
✔ Lowest clotting risk
✔ Fewer procedures
✔ Lowest mortality
Disadvantages
- Takes time to mature
- Not possible in all patients
- May fail early
ARTERIOVENOUS GRAFT (AV GRAFT)
What is it?
A synthetic tube connects:
- Artery → graft → vein
- Placed under the skin
- Used for needle dialysis
Can be used in 2–3 weeks.
Expected Outcomes – AV Graft
Short-term (0–1 month)
- Faster use than fistula
- Good initial flow
- Early thrombosis possible
Possible early problems:
- Bleeding
- Infection
- Swelling
- Early clotting
Intermediate (1 month – 2 years)
Most grafts function well but need maintenance.
Expected:
- Higher stenosis rate
- Requires angioplasty
- Higher thrombosis risk
Common issues:
- Venous anastomosis stenosis
- Thrombosis
- Infection
- Pseudoaneurysm
Long-term (2+ years)
Expected lifespan:
- 1–3 years average
- Some last 3–5 years
- Requires interventions to maintain
Patency:
- Primary patency poor
- Assisted patency good with maintenance
Long-term complications:
- Recurrent thrombosis
- Infection
- Graft degeneration
Advantages of Graft
✔ Faster use
✔ Good option if veins poor
✔ Predictable anatomy
✔ Easier cannulation
Disadvantages
- Shorter lifespan than fistula
- Higher infection risk
- Higher clotting rate
- More procedures required
DIALYSIS CATHETER (TUNNELED LINE)
What is it?
A tube placed into:
- Neck vein (most common)
- Chest
- Groin (temporary)
Blood flows through catheter during dialysis.
Can be used immediately.
Expected Outcomes – Dialysis Catheter
Short-term (0–1 month)
- Immediate dialysis possible
- No needle sticks
- High infection risk starts early
Early complications:
- Infection
- Bleeding
- Malposition
- Pneumothorax
- Poor flow
Intermediate (1–6 months)
Problems increase with time.
Common:
- Line infection
- Line blockage
- Fibrin sheath
- Poor dialysis adequacy
Long-term (>6 months)
Not recommended long term.
Expected lifespan:
- Weeks to months ideal
- Some last 6–12 months
- Long-term use increases complications
Major long-term risks:
- Bloodstream infection
- Central vein stenosis
- Catheter thrombosis
- Sepsis
- Hospital admission
Catheters have:
- Highest mortality
- Highest infection rate
- Worst dialysis quality
ACCESS COMPARISON
| Feature | Fistula | Graft | Catheter |
| Use time | 2–4 months | 2–3 weeks | Immediate |
| Lifespan | 5–10+ years | 1–3 years | Weeks–months |
| Infection risk | Lowest | Moderate | Highest |
| Clotting risk | Lowest | Moderate | Highest |
| Dialysis quality | Best | Good | Poor |
| Procedures needed | Few | Moderate | Frequent |
| Hospital admissions | Lowest | Moderate | Highest |
| Preferred option | YES | If no fistula | Temporary only |
Which Access is Best?
Most patients should aim for:
- Fistula (best)
- Graft (if fistula not possible)
- Catheter (temporary only)
When Each is Used
Fistula:
- Planned dialysis
- Good veins
- Long-term dialysis
Graft:
- Poor veins
- Failed fistula
- Need faster access
Catheter:
- Emergency dialysis
- While waiting for fistula
- No other access available
When to Call Doctor Urgently
Fistula/Graft:
- No thrill
- Swelling
- Pain
- Redness
- Bleeding
- Cold hand
Catheter:
- Fever
- Pus
- Line not working
- Pain
- Swelling
- Bleeding
