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Baseline Data

 

SECTION TWO

Testing and Collection of Baseline Data

This data, collected prior to testing, is extremely valuable when compared to the data collected during testing to enable the evaluator to interpret the results of the evaluation.

  

PRE-TEST DATA

Heart Rate Response Testing

  Reason for performing test:

The physiological basis for monitoring heart rate during the evaluation is to monitor consistency of performance, level of effort, and evaluating the client's response to determined physical demands. Heart rate response comparison is based on the clients’ previously evaluated ability to perform during the three (3) minute step test or other appropriately followed cardiovascular testing protocols.

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Procedure (detail):

The heart rate is monitored continuously during testing by use of a remote heart rate monitor placed on non dominant wrist with transmitter placed around the chest and below the nipple line on men, below breasts on females.

Use of equipment during testing:

Record heart rate response reading achieved at the start and end of each test segment. When performing BABI testing, 30 or 60 second readings are required. Comparison should be made to the predicted maximal heart rate using a standard Karvonen (220 - age) = maximal heart rate x% of max desired. Set monitor alarm at 75% ± 5 beats per minute as a safety guide for the segment of testing.

  Data collection and correlation (what is being measured, observed, and how):

  Expected results or normally viewed patterns:

Heart rate normally increases with effort required to perform activity.

Heart rate and respiration will increase during the first 1-2 minutes of activity until steady state is achieved.

Increases or decreases in heart rate mirror the physical strain experienced subjectively under a standard rate of exercise (Astrand).

Hint:

Monitoring of heart rate can allow easier interpretation of results to produce a more objective F.C.E. report. Linking observed pain behaviors and heart rate to the activities being performed can provide data on the consistency of performance.


Example Client 1:

Objectively, this information indicates that either A) inconsistency in performance may be due to perception of pain not the ability to perform the function or B) lower limb issues may exist.

 

 Example Client 2:

Objectively, this information indicates consistency in performance with minimal pain related dysfunction.

 

Contraindications:

If a resting heart rate is above 100 bpm, attempt to have the client relax and bring the heart rate down. This can be done with client taking slow deep breaths or having the client focus on relaxing thoughts.

Smoking, medications, caffeine, recent viral infections, or fever can artificially increase resting heart rate. In the case of Beta Blocker use, the heart rate may be reduced and should be taken into consideration. But the use of these medications is not a contraindication to performing the evaluation. Remember these clients will have to return to the job on some long term medications including Beta Blockers so performance abilities should be known.

 

References to review:

Borg’s Perceived Exertion and Pain Scales, Gunnar Borg

Perceived Exertion, Noble and Robertson

Guidelines for Exercise Testing and Prescription (ACSM)

Textbook of Work Physiology, Astrand and Rodahl

Moltmer, Holzl, and Strian 'Heart Rate Changes as a Autonomic Component of the Pain Response.’

Kregel, Seals and Callister 'Sympathetic Nervous System Activity During Skin Cooling In Humans; relationship to stimulus intensity and pain sensation.'

Equipment required:

"Polar or Freestyle" Trademarked heart rate monitors

What information needs to be included in report:

 

 

Blood Pressure Testing

Reason for performing test:

Blood pressure is a physiological means of monitoring and preventing clients from exceeding safe physiological limits. Please read contraindications for safe limits during testing. A pressure reading of 145/95 mmHg should be considered significant when monitoring blood pressure during periods throughout the evaluation.

  Procedure (detail):

Taken in seated position after resting for a period of five (5) minutes with elbow slightly flexed and supported on chair arm or pillow.

  1. Place the blood pressure cuff around the dominant arm of the client at heart level. Align the cuff with the brachial artery.
  2. Place stethoscope bell below the (ante) anterior cubital space over the brachial artery.
  3. Quickly pump the cuff up to a pressure of 200 mmHg then slowly release pressure at a rate equal to 2 - 3 mm Hg/sec noting first Korotkoff sound.
  4. Continue to release pressure noting when sound becomes muffled and when sound disappears.
  5. Denote 1st sound as the systolic blood pressure and the last sound as the diastolic blood pressure

  Use of equipment during testing:

Can be performed manually but it is recommended that a digital device be used for simplicity and efficiency. When using a digital device follow manufacturers’ instructions. Avoid movement when device is functioning.

  Data collection and correlation (what is being measured, observed, and how):

 

  Expected results or normally viewed patterns:

With age, remember there is an increase in arterial blood pressure.

Example: 'Riendall 1960' -

A 25 year old records B.P. of 125/75 mmHg during resting.
During exercise (1.5 L/min VO2 ) B.P. was 160/90 mmHg.
A 55 year old records B.P. of 140/85 mmHg resting.
During exercise (1.5 L/min VO2) B.P. was 180/90 mmHg

Hints:

Digital blood pressure monitors are recommended for this evaluation.
Make sure to ask the client if they are currently under hypertensive medication or beta
blocking drugs, as they will significantly affect the accuracy of this portion of the
testing.
If extra B.P. monitoring is required, it is handy to measure B.P. after: Cardiovascular evaluation (Step Test) - during initial phase of the recovery period. After significant increases in subjective pain complaints. Between lifting and carrying. After simulated activities where exertion levels are high, or after every 3 activities.

Contraindications:

Any candidate with a resting systolic pressure.200 mmHg or resting diastolic pressure . 115 mmHg should be cleared by referring doctor prior to testing.

Pressures between 145/95 and 200/115 should be considered on the basis of professional judgement of the evaluator based on individual cases, referral information, available medical information, and client's report.

Classification of Blood Pressure for Adults Age 18 and Older

Systolic (mmHg) Diastolic (mmHg) Category
<130 <85 Normal
130 - 139 85 - 89 High Normal
140 - 159 90 - 99 Mild (stage 1) Hypertension
160 - 179 100 - 109 Moderate (stage 2) Hypertension
180 - 209 110 - 119 Severe (stage 3) Hypertension
>210 >120 Very Severe (stage 4) Hypertension

Table 3 - 4 ACSM's Guidelines For Exercise Testing and Prescription, pg. 33, 5th ed., 1995

  Typical Substitution patterns:

Valsalva Manoeuvre may be a noted occurrence causing sharp increases in blood pressure. The evaluator should monitor clients respiration pattern to make sure the client is not holding his/her breath during activities.


  Equipment required

  What information needs to be included in report:

 

Pain Testing

For the purposes of this manual, a simple linear 0-10 pain scale is used and recorded. More involved processes can be used, however, time and simplicity of use by the client must be considered when examining the whole process. The real usefulness is to provide a means of reporting a rise, fall, or static pain reading in relation to certain activities.

Explain pain graph and establish pre-test pain level.

0 1 2 3 4 5 6 7 8 9 10

 

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It is often difficult for a client demonstrating pain behaviors to give an actual numerical value for pain.

These clients always want to describe the pain in detail - its character, type, behaviour, and position.

Beware that time is of the essence and that pain levels are not as important to you as they may be to the client.

Hint:

Ask for position of pain and number value of pain only.

It may help to ask if the pain has increased, decreased, or is about the same as the previous level.

It may also help to establish that tightness, heaviness, ache, and crampy feelings, are all regarded as pain when assessing pain values.

 

Perceived Exertion

The Modified Rating of Perceived Exertion Scale can be useful when correlating with Pain and heart rate levels (B.A.B.I.) to build up a profile of behaviors during the various components of the test.

This scale is useful as a means of objectively measuring the perceived difficulty of performing the activity as opposed to measuring pain levels.

It is an unusual concept for the client to grasp, but after several activities they will usually nominate the value spontaneously. Using the verbal correlation may also be useful in getting concept across to a client

Hint:

 

Original and Revised Scales for Ratings of Perceived Exertion (RPE)

 

Original Scale Revised Scale
6 No exertion at all 0 Nothing at all
7 Extremely light 0.5 Extremely weak (not noticeable)
8 1 Very weak
9 Very light 2 Weak (light)
10 3 Moderate
11 Light 4
12 5 Strong (heavy)
13 Somewhat hard 6
14 7 Very strong
15 Hard 8
16 9
17 Very hard 10 Extremely strong (almost max)
18  
19 Extremely hard  
20 Maximal exertion  

G. Borg, 1982, Psychophysical judgement and the process of perception, H.G. Geissler and P. Petzold, Berlin: VEB Deutscher Verlag der Wissenschaften, 25-34.

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