The History of Buttonhole Technique

Full text: click here

✅ History of Buttonhole Technique – MCQs

---

1. What is the buttonhole technique in hemodialysis?
A. A method of cannulating an arteriovenous fistula using the same site and angle to create a track
B. A technique to insert a central venous catheter
C. A way to access peritoneal dialysis catheters
D. A method of creating a new fistula
➡️ Answer: A. A method of cannulating an arteriovenous fistula using the same site and angle to create a track

---

2. When was the buttonhole technique first introduced or described?
A. Early 1970s
B. 1950s
C. 1990s
D. 2000s
➡️ Answer: A. Early 1970s

---

3. Who is credited with pioneering or popularizing the buttonhole technique?
A. Dr. Twardowski and colleagues
B. Willem Kolff
C. Belding Scribner
D. John Jacob Abel
➡️ Answer: A. Dr. Twardowski and colleagues

---

4. What was the main motivation behind developing the buttonhole technique?
A. To reduce pain and trauma associated with repeated needle sticks
B. To improve dialyzer efficiency
C. To eliminate the need for fistula creation
D. To reduce infection rates in peritoneal dialysis
➡️ Answer: A. To reduce pain and trauma associated with repeated needle sticks

---

5. The buttonhole technique involves creating a tunnel track by:
A. Repeated cannulation at the exact same site and angle over several sessions
B. Random cannulation at different sites
C. Using large bore needles only
D. Surgical creation of a tunnel under the skin
➡️ Answer: A. Repeated cannulation at the exact same site and angle over several sessions

---

6. What is a commonly reported benefit of the buttonhole technique?
A. Less pain during needle insertion
B. Increased blood flow rates
C. Higher dialysate purity
D. Faster dialysis sessions
➡️ Answer: A. Less pain during needle insertion

---

7. Which complication has been associated with the buttonhole technique compared to the traditional rope-ladder technique?
A. Higher risk of infection or tunnel tract infection
B. Higher rates of thrombosis
C. Lower dialysis adequacy
D. Increased vascular stenosis
➡️ Answer: A. Higher risk of infection or tunnel tract infection

---

8. In which patient population is the buttonhole technique often preferred?
A. Patients with difficult vascular access or painful cannulation
B. All newly created fistulas
C. Peritoneal dialysis patients
D. Patients with central venous catheters
➡️ Answer: A. Patients with difficult vascular access or painful cannulation

---

9. Which of the following is an alternative to the buttonhole technique for AV fistula cannulation?
A. Rope-ladder technique
B. Central venous catheter insertion
C. Peritoneal dialysis catheter placement
D. Surgical fistula ligation
➡️ Answer: A. Rope-ladder technique

---

10. Proper training and hygiene are essential to reduce which risk in buttonhole cannulation?
A. Infection
B. Bleeding
C. Thrombosis
D. Hypotension
➡️ Answer: A. Infection

---

11. The buttonhole technique is also known by what other name?
A. Constant-site cannulation
B. Rope-ladder cannulation
C. Stepladder technique
D. Random-site cannulation
➡️ Answer: A. Constant-site cannulation

---

12. The buttonhole technique was originally developed for patients using which type of vascular access?
A. Arteriovenous fistula (AVF)
B. Central venous catheter (CVC)
C. Arteriovenous graft (AVG)
D. Peritoneal dialysis catheter
➡️ Answer: A. Arteriovenous fistula (AVF)

---

13. How long does it typically take to establish a mature buttonhole track?
A. Approximately 6 to 10 consecutive dialysis sessions
B. Immediately after fistula creation
C. 1 to 2 weeks
D. More than 6 months
➡️ Answer: A. Approximately 6 to 10 consecutive dialysis sessions

---

14. What type of needles are typically used in buttonhole cannulation once the track is established?
A. Blunt needles
B. Sharp needles
C. Large bore needles only
D. Catheters
➡️ Answer: A. Blunt needles

---

15. Which of the following is a contraindication for using the buttonhole technique?
A. Infected or inflamed fistula site
B. Newly created fistula
C. Mature fistula with good blood flow
D. Patients with multiple prior cannulation sites
➡️ Answer: A. Infected or inflamed fistula site

---

16. Studies have suggested that the buttonhole technique may reduce:
A. Cannulation-related aneurysm formation
B. Dialysis adequacy
C. Vascular access thrombosis rates
D. Infection risk compared to rope-ladder technique
➡️ Answer: A. Cannulation-related aneurysm formation

---

17. Which practice is essential to prevent infections in buttonhole cannulation?
A. Strict aseptic technique and scab removal before needle insertion
B. Use of sharp needles every session
C. Changing needle insertion sites daily
D. Avoiding antiseptics
➡️ Answer: A. Strict aseptic technique and scab removal before needle insertion

---

18. What was a driving factor for developing the buttonhole technique in the 1970s?
A. High patient discomfort and damage from repeated needle insertions
B. High cost of dialysis membranes
C. Lack of trained staff
D. Need for faster dialysis sessions
➡️ Answer: A. High patient discomfort and damage from repeated needle insertions

---

19. Which of the following outcomes has been observed with buttonhole cannulation?
A. Reduced pain scores during cannulation
B. Increased incidence of stenosis
C. Decreased fistula blood flow
D. Increased hematoma formation
➡️ Answer: A. Reduced pain scores during cannulation

---

20. What is a common method used to form the buttonhole track?
A. Repeated cannulation with sharp needles at the same site and angle to create a tunnel
B. Surgical creation of a tunnel
C. Use of blunt needles from the first session
D. Random cannulation sites over the fistula
➡️ Answer: A. Repeated cannulation with sharp

21. In which patient group has the buttonhole technique shown the greatest benefit?
A. Patients with difficult or painful cannulation sites
B. Patients with newly created fistulas
C. Patients on peritoneal dialysis
D. Patients with central venous catheters
➡️ Answer: A. Patients with difficult or painful cannulation sites

---

22. What is a key difference in needle use between buttonhole and rope-ladder techniques after track formation?
A. Buttonhole uses blunt needles, rope-ladder uses sharp needles
B. Both use blunt needles
C. Buttonhole uses larger bore needles
D. Rope-ladder uses blunt needles only
➡️ Answer: A. Buttonhole uses blunt needles, rope-ladder uses sharp needles

---

23. How does the buttonhole technique potentially reduce aneurysm formation?
A. By repeatedly cannulating the exact same spot, preventing repeated trauma at multiple sites
B. By increasing blood flow velocity
C. By using smaller needles
D. By avoiding cannulation altogether
➡️ Answer: A. By repeatedly cannulating the exact same spot, preventing repeated trauma at multiple sites

---

24. Which of the following is a significant infection risk factor in buttonhole cannulation?
A. Improper scab removal before needle insertion
B. Use of blunt needles only
C. Rotating cannulation sites daily
D. Use of antiseptic solution
➡️ Answer: A. Improper scab removal before needle insertion

---

25. Buttonhole cannulation was inspired by which principle or concept?
A. Creating a tunnel track similar to a pierced ear or catheter tract
B. Random site rotation
C. Surgical graft placement
D. Use of only large bore needles
➡️ Answer: A. Creating a tunnel track similar to a pierced ear or catheter tract

---

26. What is a commonly reported patient satisfaction benefit of buttonhole cannulation?
A. Decreased pain and anxiety related to needle insertion
B. Increased dialysis time
C. Reduced blood flow rates
D. Need for fewer dialysis sessions
➡️ Answer: A. Decreased pain and anxiety related to needle insertion

---

27. What infection control practice is crucial specifically for buttonhole tracks?
A. Gentle scab removal with sterile technique before needle insertion
B. Use of non-sterile gloves
C. Avoiding cleaning of the site
D. Using sharp needles for all cannulations
➡️ Answer: A. Gentle scab removal with sterile technique before needle insertion

---

28. When buttonhole tracks become infected, what is a common treatment approach?
A. Antibiotics and sometimes surgical excision of the track
B. Increased dialysis frequency
C. Use of larger needles
D. Changing to peritoneal dialysis
➡️ Answer: A. Antibiotics and sometimes surgical excision of the track

---

29. Which statement best describes the impact of the buttonhole technique on vascular access longevity?
A. It may reduce trauma and prolong fistula lifespan but requires careful infection control
B. It shortens fistula lifespan
C. It increases thrombosis rates
D. It has no impact on fistula longevity
➡️ Answer: A. It may reduce trauma and prolong fistula lifespan but requires careful infection control

---

30. Which of the following is a contraindication to starting the buttonhole technique?
A. Presence of fistula infection or abscess
B. Mature fistula with adequate blood flow
C. Painful cannulation with conventional techniques
D. Patient preference for buttonhole
➡️ Answer: A. Presence of fistula infection or abscess

---

31. What type of needle is recommended for use once the buttonhole track is mature?
A. Blunt needle
B. Sharp needle
C. Large bore needle only
D. Intravenous catheter
➡️ Answer: A. Blunt needle

---

32. How often should the buttonhole track be cannulated in order to maintain its integrity?
A. Every dialysis session
B. Every other session
C. Weekly
D. Monthly
➡️ Answer: A. Every dialysis session

---

33. Which of the following complications has been reported more frequently with buttonhole cannulation compared to rope-ladder?
A. Staphylococcus aureus infections
B. Vascular stenosis
C. Aneurysm formation
D. Lower blood flow rates
➡️ Answer: A. Staphylococcus aureus infections

---

34. What is the recommended method to reduce infection risk during buttonhole cannulation?
A. Careful removal of scabs with sterile instruments and antiseptic skin preparation
B. Use of non-sterile gloves to avoid contamination
C. Skipping antiseptic preparation to avoid skin irritation
D. Rotating cannulation sites every session
➡️ Answer: A. Careful removal of scabs with sterile instruments and antiseptic skin preparation

---

35. Which of the following is a potential benefit of buttonhole cannulation?
A. Reduced aneurysm formation
B. Increased bleeding complications
C. Higher infection rates
D. Decreased dialysis adequacy
➡️ Answer: A. Reduced aneurysm formation

---

36. What is the typical duration required to form a mature buttonhole tunnel?
A. 6-10 sessions of repeated cannulation at the same site
B. 1 session
C. 3-4 weeks
D. 3-6 months
➡️ Answer: A. 6-10 sessions of repeated cannulation at the same site

---

37. Buttonhole technique is most suitable for patients with:
A. Established, mature arteriovenous fistulas with challenging cannulation
B. Newly created fistulas
C. Central venous catheters
D. Peritoneal dialysis catheters
➡️ Answer: A. Established, mature arteriovenous fistulas with challenging cannulation

---

38. What is the main reason for infection risk in buttonhole technique?
A. Scab formation over the buttonhole tract harboring bacteria
B. Use of blunt needles
C. Repeated rotation of needle sites
D. Use of sterile technique
➡️ Answer: A. Scab formation over the buttonhole tract harboring bacteria

---

39. The buttonhole technique reduces which patient discomfort compared to the rope-ladder technique?
A. Needle insertion pain
B. Dizziness
C. Hypotension during dialysis
D. Muscle cramps
➡️ Answer: A. Needle insertion pain

---

40. Which of the following is an important training aspect for staff performing buttonhole cannulation?
A. Consistent technique in needle angle and insertion site, plus strict aseptic technique
B. Rotating insertion sites each session
C. Avoiding antiseptics to preserve skin integrity
D. Using sharp needles only
➡️ Answer: A. Consistent technique in needle angle and insertion site, plus strict aseptic technique

---

41. What type of vascular access is the buttonhole technique primarily used for?
A. Arteriovenous fistula (AVF)
B. Central venous catheter (CVC)
C. Peritoneal dialysis catheter
D. Arteriovenous graft (AVG)
➡️ Answer: A. Arteriovenous fistula (AVF)

---

42. Which of the following is a recognized advantage of the buttonhole technique?
A. Less needle-related pain and easier cannulation
B. Decreased risk of vascular access stenosis
C. Reduced need for anticoagulation
D. Shorter dialysis treatment times
➡️ Answer: A. Less needle-related pain and easier cannulation

---

43. Which complication remains a concern and requires careful monitoring in patients using the buttonhole technique?
A. Infection, especially Staphylococcus aureus bacteremia
B. Dialyzer membrane failure
C. Peritoneal leakage
D. Electrolyte imbalance
➡️ Answer: A. Infection, especially Staphylococcus aureus bacteremia

---

44. How can the risk of infection in buttonhole cannulation be minimized?
A. Removing scabs gently with sterile tools and using antiseptic skin preparation
B. Skipping scab removal to avoid trauma
C. Using sharp needles every session
D. Avoiding skin cleaning to preserve natural flora
➡️ Answer: A. Removing scabs gently with sterile tools and using antiseptic skin preparation

---

45. Which clinical scenario is least appropriate for starting buttonhole cannulation?
A. A newly created AV fistula less than 6 weeks old
B. A mature AV fistula with painful cannulation
C. A patient with needle phobia
D. A patient with limited cannulation sites
➡️ Answer: A. A newly created AV fistula less than 6 weeks old

---

46. The buttonhole technique is sometimes compared with which other cannulation method?
A. Rope-ladder technique
B. Central venous catheterization
C. Peritoneal dialysis
D. Arteriovenous graft cannulation
➡️ Answer: A. Rope-ladder technique

---

47. Buttonhole technique reduces trauma to the fistula by:
A. Using the same needle track repeatedly, minimizing vessel wall damage
B. Changing needle insertion sites daily
C. Using larger bore needles
D. Avoiding needle use altogether
➡️ Answer: A. Using the same needle track repeatedly, minimizing vessel wall damage

---

48. What is a common patient complaint that buttonhole cannulation aims to address?
A. Pain during needle insertion
B. Dialysis-related hypotension
C. Electrolyte imbalances
D. Fatigue post dialysis
➡️ Answer: A. Pain during needle insertion

---

49. Which training element is critical for staff performing buttonhole cannulation?
A. Strict aseptic technique and consistent needle placement
B. Use of non-sterile gloves to improve dexterity
C. Rotating sites every session
D. Avoiding antiseptics to reduce skin irritation
➡️ Answer: A. Strict aseptic technique and consistent needle placement

---

50. Which statement about the buttonhole technique is TRUE?
A. It may increase infection risk if strict hygiene is not maintained
B. It completely eliminates risk of infection
C. It is suitable for all dialysis patients immediately after fistula creation
D. It requires changing the cannulation site every dialysis session
➡️ Answer: A. It may increase infection risk if strict hygiene is not maintained

---

Best Access Procedures from the Dialysis Units’ Viewpoint

Full Text:click here

Assessment of the New AVF for Maturity.

Full Text:click here

Assessment of New AVF for Maturity – MCQ

1. What is the recommended minimum duration before a new AVF should be assessed for maturity?
A. 1 week
B. 2 weeks
C. 4-6 weeks
D. 10-12 weeks
Answer: C. 4-6 weeks

---

2. Which of the following is not part of the 'rule of 6's' for AVF maturity?
A. Depth less than 6 mm
B. Diameter more than 6 mm
C. Flow rate more than 600 mL/min
D. Bruit audible for 6 seconds
Answer: D. Bruit audible for 6 seconds

---

3. A mature AVF should have a blood flow rate of at least:
A. 200 mL/min
B. 400 mL/min
C. 600 mL/min
D. 1000 mL/min
Answer: C. 600 mL/min

---

4. Which physical finding suggests an immature AVF?
A. Easily compressible vein
B. Continuous thrill during palpation
C. Collapsed vein on arm elevation
D. Shallow vein less than 6 mm deep
Answer: C. Collapsed vein on arm elevation

---

5. What diagnostic tool is most commonly used to assess AVF maturity?
A. Chest X-ray
B. Doppler ultrasound
C. CT angiogram
D. Venogram
Answer: B. Doppler ultrasound

---

6. The presence of a strong continuous thrill upon palpation indicates:
A. Thrombosis
B. Infection
C. Adequate AVF flow
D. Low blood pressure
Answer: C. Adequate AVF flow

---

7. According to the KDOQI guidelines, how long after AVF creation should it ideally be used for dialysis if mature?
A. Immediately
B. Within 1 week
C. After 2 weeks
D. After 6 weeks
Answer: D. After 6 weeks

---

8. What is the purpose of the “rule of 6’s” in AVF assessment?
A. To diagnose AVF thrombosis
B. To monitor infection
C. To evaluate AVF maturity
D. To plan surgical intervention
Answer: C. To evaluate AVF maturity

---

9. Which of the following is a sign of AVF maturity suitable for cannulation?
A. No palpable thrill
B. Vein depth of 1.5 cm
C. Vein diameter of 7 mm
D. Pulsatile mass over the site
Answer: C. Vein diameter of 7 mm

---

10. Which clinical sign during auscultation indicates an AVF with sufficient flow?
A. Continuous machinery murmur
B. No sound heard
C. Soft bruit only on compression
D. Bruit during both systole and diastole
Answer: D. Bruit during both systole and diastole

---

11. Which of the following is a false statement regarding AVF maturation?
A. Maturation is influenced by the size of the vein and artery
B. Handgrip exercises can promote maturation
C. AVF should ideally be used within 3 days of creation
D. AVF may fail to mature due to venous stenosis
Answer: C. AVF should ideally be used within 3 days of creation

---

12. The rule of 6’s includes all the following EXCEPT:
A. Minimum blood flow of 600 mL/min
B. Vein diameter of at least 6 mm
C. Vein depth of more than 6 cm
D. Length of usable vein > 6 cm
Answer: C. Vein depth of more than 6 cm
(Correct depth is less than 6 mm, not more than 6 cm)

---

13. Which imaging study helps confirm stenosis if an AVF fails to mature?
A. Abdominal ultrasound
B. MRI scan
C. Fistulogram
D. Echocardiogram
Answer: C. Fistulogram

---

14. Which of the following may delay AVF maturation?
A. Handgrip exercises
B. Arterial calcification
C. Normal venous anatomy
D. Daily vein palpation
Answer: B. Arterial calcification

---

15. What is a key reason for routine physical examination of a new AVF?
A. Check blood sugar
B. Detect infection only
C. Evaluate thrill, bruit, and vein characteristics
D. Confirm anticoagulation dose
Answer: C. Evaluate thrill, bruit, and vein characteristics

---

16. What is the typical frequency for monitoring a new AVF during its maturation period?
A. Daily
B. Weekly
C. Every 3 months
D. Only on the first day
Answer: B. Weekly

---

17. A newly created AVF is assessed at 6 weeks and has no thrill or bruit. What is the most likely issue?
A. Hyperkalemia
B. Venous hypertension
C. Thrombosis or occlusion
D. Arterial steal syndrome
Answer: C. Thrombosis or occlusion

---

18. The presence of a continuous thrill upon palpation and a bruit during both systole and diastole is associated with:
A. Infection
B. Adequate AVF flow
C. Inflow stenosis
D. Hematoma
Answer: B. Adequate AVF flow

---

19. What vein depth is generally considered acceptable for successful AVF cannulation?
A. <3 mm
B. <6 mm
C. >10 mm
D. >12 mm
Answer: B. <6 mm

---

20. In a maturing AVF, which of the following helps predict successful use for dialysis?
A. No palpable vein
B. Pulsatile mass
C. Straight segment of vein at least 6 cm
D. Redness and warmth at site
Answer: C. Straight segment of vein at least 6 cm

---

21. A new AVF shows high-pitched bruit with weak thrill. What is the most probable cause?
A. Normal maturation
B. Venous outflow stenosis
C. Hypotension
D. Fistula rupture
Answer: B. Venous outflow stenosis

---

22. Hand exercises post-AVF creation are encouraged to:
A. Prevent infection
B. Reduce swelling
C. Promote venous dilation and maturation
D. Lower blood pressure
Answer: C. Promote venous dilation and maturation

---

23. What should be the ideal time gap between AVF creation and first cannulation attempt?
A. 1-2 days
B. 1 week
C. 4-6 weeks
D. 3 months
Answer: C. 4-6 weeks

---

24. A 6-week-old AVF has good thrill and bruit but a narrow segment of vein. What’s the next best step?
A. Start using for dialysis immediately
B. Apply cold compress
C. Refer for ultrasound mapping
D. Clamp the AVF
Answer: C. Refer for ultrasound mapping

---

25. A mature AVF should have how many cm of accessible straight vein for successful cannulation?
A. 1 cm
B. 3 cm
C. 6 cm
D. 10 cm
Answer: C. 6 cm

---

26. During AVF assessment, which of the following indicates inadequate inflow?
A. Strong continuous thrill
B. High-pitched bruit
C. Weak or absent thrill
D. Soft compressible vein
Answer: C. Weak or absent thrill

---

27. The term “non-maturing fistula” is typically applied when the AVF fails to mature after:
A. 1 week
B. 2 weeks
C. 4 weeks
D. 6 weeks
Answer: D. 6 weeks

---

28. The most common cause of primary AVF failure is:
A. Infection
B. Hematoma
C. Central venous stenosis
D. Juxta-anastomotic stenosis
Answer: D. Juxta-anastomotic stenosis

---

29. Which of the following is NOT part of a physical examination of AVF maturity?
A. Palpation of thrill
B. Auscultation of bruit
C. Monitoring blood pressure
D. Assessment of vein diameter and depth
Answer: C. Monitoring blood pressure

---

30. A newly formed AVF with swelling, redness, and tenderness at the site may indicate:
A. Normal postoperative change
B. Infection or hematoma
C. Proper AVF dilation
D. High fistula flow
Answer: B. Infection or hematoma

---

31. Doppler ultrasound shows AVF flow at 350 mL/min, vein diameter 4 mm, and depth 10 mm. What does this indicate?
A. Fistula ready for use
B. Fistula is mature
C. Fistula is immature
D. Normal result
Answer: C. Fistula is immature

---

32. During assessment, a long segment of the vein collapses with arm elevation. This suggests:
A. Normal AVF
B. Venous stenosis
C. Patent outflow
D. Arterial steal
Answer: B. Venous stenosis

---

33. In clinical practice, how often should physical exams of a new AVF be conducted before first use?
A. Only on day 1
B. Weekly until use
C. Monthly
D. Only when symptoms arise
Answer: B. Weekly until use

---

34. Which of the following is LEAST useful in evaluating AVF maturity?
A. Vein compressibility
B. Doppler flow measurement
C. Skin pigmentation over site
D. Palpation of thrill
Answer: C. Skin pigmentation over site

---

35. What is the key factor in determining whether a new AVF can be successfully used for two-needle cannulation?
A. Flow rate only
B. Bruit alone
C. Vein size, depth, and accessible length
D. Patient’s age
Answer: C. Vein size, depth, and accessible length

---

36. A new AVF is difficult to visualize and cannulate due to depth. What is the most appropriate management?
A. Apply cold packs
B. Immediate use for dialysis
C. Surgical superficialization
D. Start heparin infusion
Answer: C. Surgical superficialization

---

37. The term "primary failure" of AVF refers to:
A. Fistula infection
B. Thrombosis after 6 months
C. Failure to mature adequately for use
D. Stenosis due to repeated cannulation
Answer: C. Failure to mature adequately for use

---

38. What is the minimum vein diameter required for an AVF to be considered mature?
A. 2 mm
B. 4 mm
C. 6 mm
D. 10 mm
Answer: C. 6 mm

---

39. Which intervention is often performed when an AVF fails to mature due to a stenotic segment?
A. Antibiotic infusion
B. Balloon angioplasty
C. Vein ligation
D. Compression therapy
Answer: B. Balloon angioplasty

---

40. The absence of bruit and thrill on physical examination of a new AVF most likely indicates:
A. High flow AVF
B. Hyperfunctioning AVF
C. AVF occlusion or thrombosis
D. Venous spasm
Answer: C. AVF occlusion or thrombosis

---

41. Which of the following is the most sensitive imaging method for evaluating AVF blood flow and vessel size?
A. CT angiogram
B. Chest X-ray
C. Doppler ultrasound
D. MRI
Answer: C. Doppler ultrasound

---

42. Why is it important to assess the straight segment length of the vein in AVF evaluation?
A. Prevent thrombosis
B. Determine needle placement zone
C. Avoid infection
D. Reduce blood pressure
Answer: B. Determine needle placement zone

---

43. What is the ideal depth from the skin surface for a mature AVF vein to allow successful cannulation?
A. Less than 6 mm
B. More than 8 mm
C. 1–2 cm
D. 3–4 cm
Answer: A. Less than 6 mm

---

44. Which patient factor may delay or impair AVF maturation?
A. Young age
B. Diabetes mellitus
C. Handgrip exercises
D. High protein diet
Answer: B. Diabetes mellitus

---

45. A bruit that disappears suddenly from a previously mature AVF suggests:
A. Normal function
B. Venous hypertension
C. Acute thrombosis
D. Low flow AVF
Answer: C. Acute thrombosis

---

46. What is the most common reason for an AVF to fail to mature within the expected time frame?
A. Patient non-compliance
B. Early cannulation
C. Venous stenosis near the anastomosis
D. High calcium levels
Answer: C. Venous stenosis near the anastomosis

---

47. A mature AVF should support a dialysis blood flow rate of at least:
A. 200 mL/min
B. 400 mL/min
C. 500 mL/min
D. 600 mL/min
Answer: D. 600 mL/min

---

48. A weak, discontinuous thrill in a new AVF may be a sign of:
A. Proper function
B. Outflow obstruction
C. Hypotension
D. Normal adaptation
Answer: B. Outflow obstruction

---

49. Why should tourniquet use be minimized during AVF maturation?
A. It causes infection
B. It impairs arterial inflow and causes vein trauma
C. It dilates the fistula too much
D. It falsely increases bruit sounds
Answer: B. It impairs arterial inflow and causes vein trauma

---

50. A well-functioning AVF should exhibit which characteristic on auscultation?
A. No sound
B. Bruit only during systole
C. Bruit during both systole and diastole
D. Bruit only when compressed
Answer: C. Bruit during both systole and diastole

---

51. Before using a new AVF for dialysis, the vein should ideally be:
A. Sclerosed and deep
B. Soft, compressible, and superficial
C. Narrow and non-pulsatile
D. Indurated and firm
Answer: B. Soft, compressible, and superficial

---

52. A bruit that is high-pitched and localized near the anastomosis likely indicates:
A. Hyperfunctioning AVF
B. Normal maturity
C. Stenosis at the anastomotic site
D. Low blood flow
Answer: C. Stenosis at the anastomotic site

---

53. What is the primary goal of pre-cannulation assessment of AVF?
A. Prevent bleeding
B. Assess infection
C. Confirm functional maturity for successful dialysis
D. Evaluate for AV graft need
Answer: C. Confirm functional maturity for successful dialysis

---

54. Which of the following may enhance AVF maturation post-surgery?
A. Arm immobilization
B. Isometric handgrip exercises
C. High-protein diet
D. Smoking
Answer: B. Isometric handgrip exercises

---

55. When assessing an AVF for the first time after surgery, what is the most important early sign of patency?
A. Audible bruit only
B. Palpable thrill immediately post-op
C. High blood pressure
D. Skin color changes
Answer: B. Palpable thrill immediately post-op

---

56. Which of the following findings during AVF assessment would most likely require surgical or interventional correction?
A. Soft thrill and continuous bruit
B. Vein diameter of 7 mm
C. Flow rate of 300 mL/min at 6 weeks
D. Palpable, superficial vein
Answer: C. Flow rate of 300 mL/min at 6 weeks

---

57. A newly created AVF is not maturing and the patient has central venous stenosis. What is a common clinical finding?
A. Warmth over the site
B. Enlarged collateral veins in the upper chest
C. Bounding pulse in the radial artery
D. Pale hand on AVF side
Answer: B. Enlarged collateral veins in the upper chest

---

58. What is the recommended follow-up action if an AVF fails to mature by 6 weeks?
A. Continue monitoring until 3 months
B. Begin dialysis through the AVF
C. Refer for imaging (e.g., Doppler) and possible angioplasty
D. Apply hot packs daily
Answer: C. Refer for imaging (e.g., Doppler) and possible angioplasty

---

59. An AVF with no thrill but an audible bruit most likely indicates:
A. High flow AVF
B. Maturation complete
C. Thrombosed fistula
D. Partial outflow obstruction
Answer: D. Partial outflow obstruction

---

60. When planning for dialysis initiation, what is the primary criterion to determine if the AVF is ready for use?
A. Time since creation
B. Size of the incision scar
C. Palpable thrill and adequate vein length
D. Bruit during systole only
Answer: C. Palpable thrill and adequate vein length

---

61. Why is it important to assess both bruit and thrill in AVF evaluation?
A. To monitor infection
B. They confirm the presence and adequacy of blood flow
C. They help reduce blood pressure
D. They assess the patient’s pain level
Answer: B. They confirm the presence and adequacy of blood flow

---

62. In clinical practice, what does a “short segment” AVF refer to?
A. A fistula that is less than 1 week old
B. Vein segment < 6 cm suitable for cannulation
C. Narrow artery
D. AVF with two anastomoses
Answer: B. Vein segment < 6 cm suitable for cannulation

---

63. Which patient factor has the strongest association with poor AVF maturation?
A. Female gender
B. History of stroke
C. Obesity
D. Diabetes and peripheral vascular disease
Answer: D. Diabetes and peripheral vascular disease

---

64. What is the best non-invasive method to evaluate an AVF that fails clinical maturation assessment?
A. MRI
B. Venogram
C. Doppler ultrasound
D. Chest X-ray
Answer: C. Doppler ultrasound

---

65. When assessing a mature AVF, which parameter is NOT a part of the standard “rule of 6's”?
A. Vein depth < 6 mm
B. Vein diameter ≥ 6 mm
C. Straight vein segment ≥ 6 cm
D. Access pressure < 60 mmHg
Answer: D. Access pressure < 60 mmHg

---

66. What is the most appropriate next step when an AVF has adequate thrill and bruit but insufficient vein dilation?
A. Start using it for dialysis
B. Ligate the AVF
C. Refer for balloon angioplasty
D. Apply ice packs
Answer: C. Refer for balloon angioplasty

---

67. Which of the following is considered a functional AVF?
A. One that produces bruit only
B. One that has been surgically created
C. One that can be successfully cannulated with two needles for adequate dialysis
D. One with an incision wound healing well
Answer: C. One that can be successfully cannulated with two needles for adequate dialysis

---

68. A thrill is best assessed using which technique?
A. Stethoscope over AVF
B. Gentle palpation with fingers over the vein
C. Applying a BP cuff
D. Using a tourniquet
Answer: B. Gentle palpation with fingers over the vein

---

69. The absence of bruit in a previously functioning AVF is most likely due to:
A. Vasodilation
B. Hematoma
C. AVF thrombosis
D. Excessive flow
Answer: C. AVF thrombosis

---

70. In physical examination of a new AVF, the term “augmentation test” refers to:
A. Elevating the arm to observe venous collapse
B. Compressing outflow and observing increased thrill
C. Using ultrasound to measure vein size
D. Checking for arm circumference
Answer: B. Compressing outflow and observing increased thrill

---

71. What is the significance of a strong pulsatile AVF with no thrill?
A. It is normal
B. Indicates venous hypertension or outflow stenosis
C. Ready for dialysis
D. Suggests high cardiac output
Answer: B. Indicates venous hypertension or outflow stenosis

---

72. Which physical finding is most suggestive of early AVF stenosis?
A. Strong continuous thrill
B. High-pitched bruit localized to a single area
C. Deep, compressible vein
D. Soft bruit over full length of vein
Answer: B. High-pitched bruit localized to a single area

---

73. In assessing AVF maturity, the straight segment should be free of curves and branches for at least:
A. 3 cm
B. 5 cm
C. 6 cm
D. 10 cm
Answer: C. 6 cm

---

74. What is the best indicator that an AVF can consistently provide adequate dialysis?
A. Presence of surgical scar
B. Use of ultrasound alone
C. Successful two-needle cannulation with prescribed blood flow
D. Vein that “pops up” when arm is raised
Answer: C. Successful two-needle cannulation with prescribed blood flow

---

75. A non-maturing AVF that shows narrowing at the anastomosis on Doppler should be:
A. Observed for another month
B. Used with a single needle
C. Considered for surgical revision or angioplasty
D. Tied off and removed
Answer: C. Considered for surgical revision or angioplasty

 

76. A patient’s AVF has a vein diameter of 7 mm, depth of 4 mm, and flow of 700 mL/min. What does this indicate?

A. Immature fistula
B. Ready for first cannulation
C. Fistula thrombosis
D. Inflow stenosis
Answer: B. Ready for first cannulation

---

77. Which feature would most likely delay cannulation despite acceptable AVF blood flow?
A. Soft thrill
B. Vein depth of 12 mm
C. Bruit on auscultation
D. Straight segment of 7 cm
Answer: B. Vein depth of 12 mm

---

78. A 6-week-old AVF has a continuous thrill but no visible vein. What is the most appropriate next step?
A. Use tourniquet and attempt cannulation
B. Proceed to dialysis with single-needle cannulation
C. Refer for ultrasound to assess depth
D. Ligation of fistula
Answer: C. Refer for ultrasound to assess depth

---

79. During assessment, you find a mature AVF with 6 mm vein, shallow depth, but only 400 mL/min flow. What is the likely status?
A. Ready for full use
B. Still maturing
C. High-risk of infection
D. Should be abandoned
Answer: B. Still maturing

---

80. A dialysis nurse reports difficulty with two-needle cannulation despite AVF thrill and bruit. What is the likely cause?
A. Arterial aneurysm
B. Central venous stenosis
C. Short cannulation zone or deep vein
D. Infection
Answer: C. Short cannulation zone or deep vein

---

81. What tool helps best in mapping out a superficial segment for cannulation?
A. Tourniquet
B. Ultrasound
C. Stethoscope
D. BP cuff
Answer: B. Ultrasound

---

82. If a thrill is only felt during systole, the likely AVF issue is:
A. Complete thrombosis
B. Normal function
C. Inflow stenosis
D. Outflow stenosis
Answer: D. Outflow stenosis

---

83. Which of the following would not indicate a mature AVF?
A. 6 cm straight segment
B. 6 mm vein diameter
C. 3 cm depth from skin
D. 700 mL/min flow rate
Answer: C. 3 cm depth from skin

---

84. What is the clinical purpose of using the “augmentation test” during AVF assessment?
A. Confirm patency of AV graft
B. Identify arterial steal
C. Detect inflow problems
D. Identify infection
Answer: C. Detect inflow problems

---

85. An AVF with a flat bruit and no thrill on palpation is most likely:
A. Mature and functional
B. Ready for cannulation
C. Thrombosed or severely stenosed
D. Hyperfunctioning
Answer: C. Thrombosed or severely stenosed

---

86. After 6 weeks, an AVF has excellent thrill and bruit but cannulation repeatedly infiltrates. What is the likely issue?
A. Deep vein
B. High flow
C. Arterial steal
D. Maturation complete
Answer: A. Deep vein

---

87. A newly matured AVF shows 6 mm vein diameter, 5 mm depth, and 800 mL/min flow, but bruising after every cannulation. What might be the cause?
A. Early use
B. Incorrect needle angle or technique
C. Low AVF pressure
D. Infection
Answer: B. Incorrect needle angle or technique

---

88. A patient with a maturing AVF has difficulty doing handgrip exercises. What is an alternative recommendation?
A. Avoid using the arm
B. Isometric ball squeeze exercises
C. Blood pressure cuff inflation
D. Passive elevation
Answer: B. Isometric ball squeeze exercises

---

89. Which of the following signs suggests inflow stenosis rather than outflow stenosis?
A. Thrill present only during diastole
B. High-pitched localized bruit
C. Weak or absent thrill even on augmentation
D. Vein collapses with elevation
Answer: C. Weak or absent thrill even on augmentation

---

90. A maturing AVF with strong thrill and bruit but short usable vein (<3 cm) should be:
A. Used immediately
B. Declared mature
C. Evaluated for surgical revision
D. Ignored
Answer: C. Evaluated for surgical revision

---

91. What is the importance of mapping veins preoperatively for AVF creation?
A. Predict the duration of dialysis
B. Ensure vein diameter and patency are suitable
C. Identify AVF thrill early
D. Improve infection control
Answer: B. Ensure vein diameter and patency are suitable

---

92. A sudden loss of bruit and thrill in a previously functional AVF most likely indicates:
A. Successful maturation
B. Fistula collapse
C. Infection
D. Acute thrombosis
Answer: D. Acute thrombosis

---

93. In assessing AVF cannulation readiness, why is depth from the skin important?
A. Deeper veins are stronger
B. Shallow veins resist flow
C. Deeper veins are harder to cannulate and increase infiltration risk
D. It predicts infection risk
Answer: C. Deeper veins are harder to cannulate and increase infiltration risk

---

94. What is the recommended action if an AVF flow is <500 mL/min after 6 weeks?
A. Proceed with use
B. Start anticoagulants
C. Refer for ultrasound and consider angioplasty
D. Bandage the arm
Answer: C. Refer for ultrasound and consider angioplasty

---

95. Which sign indicates high flow AVF, potentially leading to cardiac strain?
A. Systolic-only bruit
B. Continuous low-pitched bruit
C. Bounding pulse, strong thrill, and venous hypertension
D. Deep narrow vein
Answer: C. Bounding pulse, strong thrill, and venous hypertension

---

96. Which of the following findings is least useful when determining AVF readiness for dialysis?
A. Vein diameter
B. Depth from skin
C. Skin color over the AVF
D. Flow rate
Answer: C. Skin color over the AVF

---

97. A bruit is heard only during systole. This is a classic sign of:
A. Maturation complete
B. Inflow stenosis
C. Normal variant
D. Arterial aneurysm
Answer: B. Inflow stenosis

---

98. An AVF with 6 mm diameter, 4 mm depth, but curved tortuous segments is considered:
A. Ready for two-needle use
B. At risk of infiltration; needs further evaluation
C. Functionally mature
D. A sign of thrombosis
Answer: B. At risk of infiltration; needs further evaluation

---

99. You are unable to palpate a thrill during AVF exam, but the patient is hypotensive. What should you do first?
A. Document as thrombosed
B. Wait for the next shift
C. Reassess after stabilizing blood pressure
D. Initiate heparin
Answer: C. Reassess after stabilizing blood pressure

---

100. The most reliable combination of signs indicating AVF maturity includes:
A. Bruit and elevated WBC
B. Vein length and edema
C. Vein diameter ≥ 6 mm, depth ≤ 6 mm, flow ≥ 600 mL/min
D. Patient-reported thrill only
Answer: C. Vein diameter ≥ 6 mm, depth ≤ 6 mm, flow ≥ 600 mL/min

---