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407 > Lab "4" (CV Responses) > Flashcards

Lab "4" (CV Responses) Flashcards

1
Q

Name the (8) equipment used

A
  1. Compute
  2. IXTA
  3. USB cable
  4. IXTA power supply
  5. PT-104 Pulse plethysmograph
  6. Stethoscope
  7. BP-220 Non-invasive blood pressure transducer
  8. BT-220 Black tygon tubing with Luer connectors
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2
Q

Where are we inserting the DIN8 connector of the PT-104 pulse plethysmograph

A

In channel A5 input of IXTA

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3
Q

Where are we inserting the BT-220 black tygon tubing with Luer connectors

A

Channel A2 of IXTA

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4
Q

How to calibrate the BP-220 non invasive blood pressure transducer?

A
  1. Lay cuff on table
  2. Record while cuff laying on table for 10s
  3. If Pulse signal small/noisy adjust tension on strap holding pulse plethysmograph to finger
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5
Q

Exercise 1:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: BLOOD PRESSURES FROM LEFT ARM
  2. Aim: Measure SYSTOLIC and DIASTOLIC BP’s in RECLINING subject, and determine if subject hypotensive (low BP), normotensive, hypertensive (high BP)
  3. Approximate time: 15 mins
  4. Summary of steps:
    - Subject REST IN SUPINE position ~5 mins
    - Place BP cuff around UPPER PORTION of LEFT ARM, JUST ABOVE ELBOW. Place PT-104 pulse plethysmograph on volar surface of distal segment of LFFT MIDDLE FINGER/THUMB
    - Begin recording pulse and BP
    - Inflate cuff until FINGER PULSE WAVE DISAPPEARS (DO NOT INFLATE ABOVE 150 mmHg)
    - Once finger pulse wave disappears, release cuff at ~10mmHg/second (release too fast/slow = inaccurate reading). Release pressure until aneroid gauge reads 20 mmHg
    - If listening with stethoscope , “mark” when HEAR Korotkoff sounds and “mark” again when DISAPPEAR
    - Continue rest in supine until exp 2. Flex and extend fingers to encourage blood circulation
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6
Q

Why do the pulse waves disappear?

A

Pulses disappear as the pressures in cuff exceed pressure in artery. As pressure released, pulse wave reappears

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7
Q

How to determine systolic BP from data

A

Place cursor on first smallest wave after pulse wave reappears after cuff pressure released. Value is that in BP channel.

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8
Q

How to determine diastolic BP from data

A

Place cursor on first largest wave after pulse wave reappears after cuff pressure released. Value is that in BP channel.

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9
Q

How to determine Pulse Pressure

A

Diff btwn systolic n diastolic.

- Double cursors on smallest and largest pulse waves. Value is V2-V1

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10
Q

Exercise 2:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: REPEATABILITY OF BLOOD PRESSURE MEASUREMENTS
  2. Aim: To determine REPEATABILITY of BP measurements from UPPER LEFT ARM of same subject.
  3. Approximate time: 10 mins
  4. Summary of steps
    - Subject rest in supine position ~5 mins before BP taken
    - Place BP cuff on upper portion of left arm, just above elbow. Place PT-104 pulse plethysmograph on volar surface of distal segment of left middle finger/thumb
    - Begin recording pulse and BP
    - Inflate cuff until finger pulse wave disappears in Pulse channel. Do not inflate over 150mmHg
    - Once finger pulse disappears, release cuff at rate of 10mmHg/second. Release until aneroid gauge reads 20mmHg
    - If listening w/stethoscope, “mark” when Korotkoff sounds appear and again when disappear
    - Continue to rest in supine btwn ex 2 and 3. Flex and extend fingers to improve blood circulation
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11
Q

Exercise 3:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: BLOOD PRESSURES OF RIGHT ARM
  2. Aim: To measure BP from right arm
  3. Approximate time 15 mins
  4. Summary of steps
    - subject rest in SUPINE ~5mins
    - Place cuff on upper portion of right arm, just above elbow. Place Pt-104 pulse plethysmograph on volar surface of distal segment of middle right finger/thumb
    - Begin recording BP and pulse
    - Inflate cuff until finger pulse wave disappears. Do not inflate over 150mmHg
    - Once finger pulse wave disappears, release cuff pressure at ~10mmHg/second. Release pressure until aneroid gauge reads 20 mmHg
    - If listening w/stethoscope, “mark” when hear Korotkoff sounds and again when they disappear
    - have subject rest in supine btwn exercise 3 and 4. Flex and extend fingers to improve blood circulation
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12
Q

Exercise 4:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: Blood pressures from the forearm
  2. Aim: To examine whether BP dec w/distance from heart
  3. Approximate time: 15 mins
  4. Summary of steps
    - subject REST in SUPINE before (~5mins) and during exercise
    - Place BP cuff on lower portion of right arm. Place PT-104 pulse plethysmograph on volar surface of distal segment of middle right finger/thumb.
    - Begin recording BP and pulse
    - Inflate cuff until finger pulse wave disappears (do not inflate over 150mmHg)
    - Once finger pulse disappears, release cuff pressure at rate of ~10mmHg/second. Release until aneroid gauge reads 20 mmHg.
    - If listening w/stethoscope, “mark” when hear Korotkoff sounds and when dissppear
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13
Q

Exercise 5:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: BPs w/ Diff Arms Positions
  2. Aim: To examine the effects of gravity on BP and peripheral circulation.
  3. Approximate time: 15 mins
  4. Summary of steps
    - Subject SIT and RELAX ~5mins
    - Place cuff on upper portion of LEFT arm, just above elbow.. Place PT104 pulse plethysmograph on volar surface of distal segment of left middle finger/thumb
    - Subjects HAND IN LAP, record BP and pulse as outlined in previous exercise
    - After, subject place RIGHT HAND on TOP OF HEAD. Again, determine BP. Place right hand back.
    - After, subject place LEFT HAND ON TOP OF HEAD. Again, determine BP.
    - Subject sit and relax btwn exercise 5 and 6
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14
Q

Exercise 6:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: BPs from the LEG
  2. Aim: Measure BPs from leg
  3. Approximate time: 30 mins
  4. Summary of steps
    - Subject SIT and RELAX ~5 mins
    - Place cuff on LOWER LEFT LEG, just above ankle. Place PT104 PP on volar surface of distal segment of LEFT TOE.
    - Determine BP from same procedures in Ex 1 as they are sitting w/left foot resting on floor
    - After determine BP of left leg while standing. Make sure big toe not pressed against ground, rest ball of foot on shoe so big toe suspended in air.
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15
Q

Exercise 7:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: Effects of Exercise
  2. Aim: Examine the effects of exercise on BP
  3. Approximate time: 30 mins
  4. Summary of steps:
    - Sit and relax ~5 mins
    - Place cuff around UPPER portion of LEFT ARM, just above elbow. Place PT104 PP on volar surface of distal segment of left middle finger or thumb
    - Determine BP of upper left arm as did in ex 1
    - After, remove cuff and plethysmograph from subject. Leave them connected to IXTA.
    - Subject exercise vigorously to elevate HR ~3mins either rowing, treadmill, cycling
    - Immediately after exercise, subject sit in chair. Reattach pulse plethysmograph and cuff on upper left arm as previously
    - Record BP immediately after exercise
    - After, completely deflate cuff. Monitor HR. Every 30 secs after beginning of recovery, pump cuff and record BP. Continue to record BP until pressures are similar to RESTING PRESSURES (no longer than 4 mins)
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16
Q

Exercise 8:

  1. Title
  2. Aim
  3. Approximate time
  4. Summary of steps
A
  1. Title: EFFECTS OF APNEA
  2. Aim: Examine effects of apnea (holding one’s breath) on BP
  3. Approximate time: 15 mins
  4. Summary of steps
    - Same method in Ex 1 to record BP from upper left arm
    - Then, instruct subject to take DEEP BREATH, hold for as long as possible, then return to breathing normally
    - WHILE subject holding breath, record BP and HR
    - As soon as subject STOPS holding breath, record BP and HR
    - Record BP and HR every 30 secs AFTER subject stops holding breath (for 2 mins, so at 0s, 30s, 60s, 90s, 120s)
17
Q

List the 5 precautions to take with this lab

A
  1. Know what ur doing ahead of time
  2. Don’t leave cuff inflate for prolonged period (>20s)
  3. Flex n extend fingers btwn exp to maintain blood flow
  4. Perform on healthy individuals w/no personal/fam history of CV or respiratory problems
  5. Do not over inflate cuff (<150)

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