• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

There are many measurements available to monitor changes in breathing capacity. One of the simplest measurements used by doctors and patients would be the peak flow meter

Extracts from this document...


Mohammed Almuaathen                                                                        17th of October 2005

Peak flow measurement


There are many measurements available to monitor changes in breathing capacity. One of the simplest measurements used by doctors and patients would be the peak flow meter. A peak flow meter is a “portable instrument that detects minute decreases in air flow, used by people with asthma to monitor small changes in breathing capacity[1]. The peak flow meter has two parts, a mouth piece and a meter measured in litres per minute (L/min). This type of measurement is used for diagnosis and self-management; it is very cheap and easy to manage by the patient. But unfortunately it is not very accurate as the meter only measures in every 10 L/min. There will be a greater inaccuracy to smokers since they have greater damage in there bronchioles. A peak flow meter will help the patient to tell what is going on in his airways rather than guessing the way a patient feels, also it will help whether the patient needs to change his treatment.

Asthma is a “medical condition which makes breathing difficult by causing by causing the air passages to become narrow or blocked[2].

...read more.


  1. Check the pointer is at zero and stand in a comfortable, upright position.
  2. Hold the peak flow meter level and keep fingers away from the pointer.
  3. Firstly take deep breath and then close lips firmly around the mouth piece. After that blow very hard onto the mouth piece.
  4. Look at the point and record the reading.
  5. Reset the pointer back to zero. Repeat this method three times and record the highest readings.


My three peak flow results are 500 L/min, 520 L/min and 500 L/min.

I have produced a histogram to show the distribution of the PEF of the whole class for males and females:

PEF (L/min)










PEF (L/min)












...read more.



In general peak flow meter reading will vary according to age, height, gender and also it varies from person to person, as seen from the results,it is difficult to say exactly what a persons best peak flow should be. I conclude from results that males in my group have greater vital capacity than females. I was also aware that in my group, ages do vary from someone who is 30yrs and another who is 18yrs. This is one of the reasons why the histogram graph has large distribution between both genders.

I believe, from what I was given, that the results I obtained are fairly accurate and it helps professionals to conclude whether a patient has air inflammation or not. Also helps the doctor to give the right treatments to the patient.


  • http://dictionary.reference.com
  • http://www.answers.com

[1] http://dictionary.reference.com/search?q=peak+flow+meter&r=66

[2] http://dictionary.cambridge.org/define.asp?key=4498&dict=CALD

[3] http://www.answers.com/bronchodilator&r=67

[4] http://www.answers.com/prednisolone&r=67

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Probability & Statistics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Probability & Statistics essays

  1. Marked by a teacher

    The heights of 16-18 year old young adults varies between males and females. My ...

    5 star(s)

    This represents that males are taller than females. Conclusion When I relate my evidence that I have obtained from doing confidence intervals and working out the mean and variance values of both populations to my hypothesis, the distribution of the heights of males is bigger than the heights of females.

  2. &amp;quot;The lengths of lines are easier to guess than angles. Also, that year 11's ...

    This person didn't really have a lot of error when estimating the line, they estimated only 0.4cm above the actual length but then estimated 57� above the actual angle size, which again indicates that there is no correlation, showing that this person was not too bad at estimating the line length, but were quite bad at estimating angles.

  1. Identifying Relationships -Introduction to Statistical Inference.

    If, on the other hand, the means are different then you cannot do a direct comparison of standard deviations. To compare variability of the two groups, you compute a statistic called the Coefficient of Variation that expresses the standard deviation as a percentage of the mean allowing comparisons to be made between the various groups.

  2. Development of Quantitative and Qualitative measures of Human Impact on Wimbledon Common.

    Although plants in a dense population become larger with age and as the population decreases due to mortality the law implies that the total plant weight will increase because mean plant weight is increasing faster than density is falling. This phenomenon is known as self-thinning.

  1. Investigation into the length of time which men and women can hold their breath ...

    There are many ways in which I could represent the data. One way is to draw a box and whisker diagram and make comparisons from that. Another way would be to draw a histogram of the sample, which would help me to look at the distribution of the data in the sample.

  2. Estimating the length of a line and the size of an angle.

    In addition the person answering the questions can receive help if he or she does not understand the question. Evan though quota sampling has its advantages it can easily be distorted than stratified sampling. So in my opinion I think that stratified sampling would be a better sampling method than quota sampling would be.

  1. &amp;quot;Males in the 11-18years age range will guess the angles and lengths better than ...

    Gender Age Angle est (deg) Length est (cm) 70 f 61 30 4 74 f 56 40 3 75 f 55 40 5.1 77 f 54 37 5 79 f 51 30 3.5 80 f 50 40 3 83 f 49 45 5 84 f 49 45 3.5 85 f 48 43 3.3 87 f

  2. Reaction Times

    My groups were decided as: - Reaction (cm's) 0-5 extremely fast 5-10 fairly fast 10-20 average 20-25 slow 25-30 Very slow The results for boys were as follows- Reaction Tally Frequency Cumulative Frequency 0 < r < 5 0 0 5 < r < 10 12 12 10 < r

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work