How to examine AVF
in 10 minutes
Mohammed Abdel Gawad
Nephrology Specialist
Kidney & Urology Center (KUC)
Alexandria – EGY
drgawad@gmail.com
18th KUC Club – 19, Aug, 2016
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drgawad@gmail.com
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Functioning AVF = Patient’s life
=
AVF Examination: Dose it matter?
Early Detection of Complications
Semin Dial. 2008;21:269–273.
Good AVF Examination
= Early detection of complications
= Saving AVF
= Saving patient’s life
AVF Examination: Dose it matter?
AVF Examination Equation
Good AVF Examination
= Early detection of complications
= Saving AVF
= Saving patient’s life
AVF Examination: Dose it matter?
AVF Examination Equation
KDOQI 2006
Monitoring the access
Important Concept
AVF is a continuous circuit
Examination should also include the
remaining part of arm, shoulder, breast,
neck, and face
Examination should not be limited to
the site of the AV access
Don’t think about AVF as it is only
anastomosis in the arm.
AVF is a continuous circuit which starts
at the heart and ends at the heart
How to Examine AVF?
How to Examine AVF?
1. Vascular access scar site
2. Signs of infection/inflammation
3. Hematoma
4. Signs of ischemia (Steal syndrome)
5. Aneurysm
6. Arm elevation test
7. Collaterals (Central vein stenosis)
How to Examine AVF?
1. Vascular access scar site
2. Signs of infection/inflammation
3. Hematoma
4. Signs of ischemia (Steal syndrome)
5. Aneurysm
6. Arm elevation test
7. Collaterals (Central vein stenosis)
Inspection
1- Vascular Access Scar
Anatomy of Upper Extremity Vessels
Inspection
1- Vascular Access Scar
Radiocephalic AVF
Inspection
1- Vascular Access Scar
Snuff-box AVF
Inspection
1- Vascular Access Scar
Brachiocephalic AVF
Inspection
1- Vascular Access Scar
Transposed Basilic Vein AVF
Inspection
1- Vascular Access Scar
Transposed Forearm Cephalic Vein AVF
Inspection
1- Vascular Access Scar
Transposed Forearm Basilic Vein AVF
How to Examine AVF?
1. Vascular access scar site
2. Signs of infection/inflammation
3. Hematoma
4. Signs of ischemia (Steal syndrome)
5. Aneurysm
6. Arm elevation test
7. Collaterals (Central vein stenosis)
How to Examine AVF?
1. Vascular access scar site
2. Signs of infection/inflammation
3. Hematoma
4. Signs of ischemia (Steal syndrome)
5. Aneurysm
6. Arm elevation test
7. Collaterals (Central vein stenosis)
Inspection
2- Signs of Infection/Inflammation
± Pain/Fever
Inspection
2- Signs of Infection/Inflammation
± Pain/Fever
Inspection
2- Signs of Infection/Inflammation
Skin Rash
Inspection
3- Hematoma
Inspection
4- Signs of Ischemia (Steal Syndrome)
Fingers are blue and cold
Hand pain rest/exercise
Paresthesia
Inspection
4- Signs of Ischemia (Steal Syndrome)
Ulcers
Inspection
4- Signs of Ischemia (Steal Syndrome)
(A)
Early chronic ischemia of
hand without tissue loss
(hand was cold).
(B)
Tissue loss at the fingertip
is evident (dry gangrene).
Inspection
4- Signs of Ischemia (Steal Syndrome)
How to Examine AVF?
1. Vascular access scar site
2. Signs of infection/inflammation
3. Hematoma
4. Signs of ischemia (Steal syndrome)
5. Aneurysm
6. Arm elevation test
7. Collaterals (Central vein stenosis)
How to Examine AVF?
1. Vascular access scar site
2. Signs of infection/inflammation
3. Hematoma
4. Signs of ischemia (Steal syndrome)
5. Aneurysm
6. Arm elevation test
7. Collaterals (Central vein stenosis)
Inspection
5- Aneurysms Stable Aneurysm
Inspection
5- Aneurysms
• Thin, shiny skin
• Prolonged leaking
• Ulceration
• Rapid enlargement
Unstable aneurysm
(Impending rupture)
Inspection
5- Aneurysms
Thin, shiny skin
Unstable aneurysm
(Impending rupture)
Inspection
5- Aneurysms
Aneurysms with ulceration
(arrows; depigmentation
with early skin break-down).
Unstable aneurysm
(Impending rupture)
Inspection
6- Arm Elevation Test
Inflow
Outflow
Inspection
6- Arm Elevation Test
Inspection
6- Arm Elevation Test
Normally:
Collapse
Inspection
6- Arm Elevation Test
Outflow
Stenosis
Normally:
Collapse
Inspection
7- Central vein stenosis
Inspection
7- Central vein stenosis
Inspection
7- Central vein stenosis
Early, subcutaneous collaterals
How to Examine AVF?
How to Examine AVF?
Inflow
Outflow
Feel to detect outflow or inflow problem
1. AVF Pulse Character
2. AVF Thrill
3. Pulse Augmentation Test
4. Sequential occlusion test
5. Access vs Non Access Limb
How to Examine AVF?
Inflow
Outflow
Feel to detect outflow or inflow problem
1. AVF Pulse Character
2. AVF Thrill
3. Pulse Augmentation Test
4. Sequential occlusion test
5. Access vs Non Access Limb
Palpation
1-AVF Pulse Character
Palpation
1-AVF Pulse Character
Outflow Stenosis
Hyperpulsatile, Water-hammer
Palpation
1-AVF Pulse Character
Outflow Stenosis Inflow Stenosis
Hypopulsatile, Feeble, FlatHyperpulsatile, Water-hammer
Palpation
2-AVF Thrill
Normally:
Continues Thrill
Palpation
2-AVF Thrill
Abnormally: Discontinues Thrill (Systolic only)
Outflow Stenosis
Strong, Localized
Normally:
Continues Thrill
Palpation
2-AVF Thrill
Outflow Stenosis
Strong, Localized Weak, not localized
Inflow Stenosis
Abnormally: Discontinues Thrill (Systolic only)
Normally:
Continues Thrill
Palpation
2-AVF Thrill
Examine thrill from anastomosis
all way to chest wall
Outflow Stenosis
Strong, Localized Weak, not localized
Inflow Stenosis
Abnormally: Discontinues Thrill (Systolic only)
Normally:
Continues Thrill
How to Examine AVF?
Inflow
Outflow
Feel to detect outflow or inflow problem
1. AVF Pulse Character
2. AVF Thrill
3. Pulse Augmentation Test
4. Sequential occlusion test
5. Access vs Non Access Limb
How to Examine AVF?
Inflow
Outflow
Feel to detect outflow or inflow problem
1. AVF Pulse Character
2. AVF Thrill
3. Pulse Augmentation Test
4. Sequential occlusion test
5. Access vs Non Access Limb
Palpation
3-Pulse Augmentation Test
Palpation
3-Pulse Augmentation Test
Normally: Pulse augmentation,
Absence of Thrill
Palpation
3-Pulse Augmentation Test
Normally: Pulse augmentation,
Absence of Thrill
No Pulse augmentation
Palpation
3-Pulse Augmentation Test
No Pulse augmentation,
No thrill
= Inflow stenosis
No Pulse augmentation
Palpation
3-Pulse Augmentation Test
No Pulse augmentation,
No thrill
= Inflow stenosis
No Pulse augmentation,
Normal thrill
= Accessory Vein(s)
No Pulse augmentation
Palpation
3-Pulse Augmentation Test
No Pulse augmentation,
No thrill
= Inflow stenosis
No Pulse augmentation,
Normal thrill
= Accessory Vein(s)
Sequential occlusion test
No Pulse augmentation
Palpation
4-Sequential occlusion test
To detect the level of
accessory veins
Still No Pulse augmentation,
Normal thrill
Augmentation, No thrill = Level of
accessory vein detected
How to Examine AVF?
Inflow
Outflow
Feel to detect outflow or inflow problem
1. AVF Pulse Character
2. AVF Thrill
3. Pulse Augmentation Test
4. Sequential occlusion test
5. Access vs Non Access Limb
How to Examine AVF?
Inflow
Outflow
Feel to detect outflow or inflow problem
1. AVF Pulse Character
2. AVF Thrill
3. Pulse Augmentation Test
4. Sequential occlusion test
5. Access vs Non Access Limb
Palpation
5-Access vs Non Access Limb
Test Suspected Abnormality
Temperature
Warm + swelling = infection
Cold = Steal syndrome
Grip strength
Steal syndromeRange of motion
Sensory loss
How to Examine AVF?
How to Examine AVF?
Auscultation
1-Bruit
Normally:
Continues Thrill
Auscultation
1-Bruit
Abnormally: Discontinues Thrill (Systolic only)
Outflow Stenosis
High Pitched, Loud
Normally:
Continues Thrill
Auscultation
1-Bruit
Continues Thrill
Discontinues Thrill (Systolic only)
Outflow Stenosis Inflow Stenosis
High Pitched, Loud Low Pitched, Quiet
Abnormally: Discontinues Thrill (Systolic only)
Normally:
Continues Thrill
Auscultation
1-Bruit
Continues Thrill
Discontinues Thrill (Systolic only)
Outflow Stenosis Inflow Stenosis
High Pitched, Loud Low Pitched, Quiet
Auscultate AVF from anastomosis
all way to chest wall
Abnormally: Discontinues Thrill (Systolic only)
Normally:
Continues Thrill
Auscultation
2-Heart
For early detection of newly formed
murmurs
(?? infective endocarditis)
Gawad
Thank You

How to examine AVF in 10 minutes - Dr. Gawad