Brief Answer:
440L per min

Detailed Answer:
Thank you for asking!
Seek this plotted curve. A per your height of 5 ft 6 inches equivalent 165 cm. your peak flow rate for age of 25 should be 440L/min.
Follow this link
http://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/Normal_values_for_peak_expiratory_flow_-_EU_scale.png/525px-Normal_values_for_peak_expiratory_flow_-_EU_scale.png

it is interpreted in 3 zones. Peak flow readings are often classified into 3 zones of measurement according to the XXXXXXX Lung Association
1)Green Zone     80 to 100 percent of the usual or normal peak flow readings are clear.A peak flow reading in the green zone indicates that the asthma is under good control.

2)Yellow Zone     50 to 79 percent of the usual or normal peak flow readings     Indicates caution. It may mean respiratory airways are narrowing and additional medication may be required.

3)Red Zone     Less than 50 percent of the usual or normal peak flow readings     Indicates a medical emergency. Severe airway narrowing may be occurring and immediate action needs to be taken. This would usually involve contacting a doctor or hospital.

Allow me to educate you on PEFR a little.

Peak expiratory flow rate (PEFR) is the maximum flow rate generated during a forceful exhalation, starting from full lung inflation. Peak flow rate primarily reflects large airway flow and depends on the voluntary effort and muscular strength of the patient.

Maximal airflow occurs during the effort-dependent portion of the expiratory maneuver, so low values may be caused by a less than maximal effort rather than by airway obstruction. Nevertheless, the ease of measuring peak flow rate with an inexpensive small portable device has made it popular as a means of following the degree of airway obstruction in patients with asthma and other pulmonary conditions.

Forced expiratory volume over 1 second (FEV1) is a dynamic measure of flow used in formal spirometry. It represents a truer indication of airway obstruction than does peak flow rate. Although peak flow rate usually correlates well with FEV1, this correlation decreases in patients with asthma as airflow diminishes.

Peak flow rate monitoring can be accurately performed by most patients older than 5 years (see the video below). It is most commonly measured by a portable flow gauge device (peak flow meter; but may also be obtained by a transducer that converts flow to electric output during spirometry (pneumotachometer)
The most frequent use of peak flow rate measurement is in home monitoring of asthma, where it can be beneficial in patients for both short- and long-term monitoring. When properly performed and interpreted, peak flow rate measurement can provide the patient and the clinician with objective data upon which to base therapeutic decisions.

There are conflicting data regarding the efficacy of peak flow rate monitoring for improving asthma outcome. Most studies have shown a benefit when peak flow rate monitoring is linked to a comprehensive program, combined with symptom diaries and patient education.

However, a recent meta-analysis found peak flow rate monitoring to be equivalent to symptom-based asthma action plans. Another study suggested that with symptom-based monitoring, some patients underestimate the severity of their condition and use medication inappropriately.

In 2007, an expert panel of the National Asthma Education and Prevention Program recommended periodic assessment of pulmonary function by spirometry or peak flow rate monitoring. If peak flow rate monitoring is used, a written asthma action plan should use the patient’s personal best peak flow, rather than published norms, as a reference value.

The panel recommended consideration of long-term daily peak flow rate monitoring or home peak flow rate assessment during exacerbations for patients with the following:

Moderate or severe persistent asthma
History of severe exacerbations
Poor perception of airflow obstruction and worsening asthma
Preference for peak flow rate monitoring rather than the use of a symptom-based asthma action plan
In managing chronic asthma, long-term daily peak flow rate monitoring may assist with the following measures:

Detecting early changes in asthma that may require therapy
Evaluating responsiveness to changes in therapy
Giving a quantitative measurement of improvement
Identifying temporal relationships between environmental and occupational exposures and bronchospasm
The use of peak flow rate during acute asthma exacerbations is controversial. The 2007 Expert Panel report suggested that measuring peak flow rate in acute asthma episodes helps to determine the severity of exacerbations and assists in guiding therapeutic decisions in the home, school, practitioner’s office, and emergency department.However, Eid et al have reported that peak flow rate measurement is unreliable for the classification of asthma severity.

Compliance with peak flow rate monitoring is limited by the difficulty that patients and their caregivers often have with keeping records. In one study of inner city children, monitoring decreased 30% over the course of 3 weeks. Kamps et al noted that children have poor compliance with recording peak flow rate measurements in symptom diaries. Peak flow rate measurement may be of lower utility in younger children.and elderly patients, but it has been shown to be of greater benefit in children who are poor or are members of minority groups.

Compliance with monitoring is also low for adults. In a study of adults, adherence was greatly improved by using an electronic device.

Compliance with peak flow rate monitoring is also limited by the lack of ability, on the part of most clinicians, to interpret the data in a meaningful way. Numerous scales and charts are available, but many of them are difficult to interpret.

Key Considerations
Since peak flow rate measurement depends significantly on patient effort and technique, clear instructions, demonstrations, and frequent review of technique are essential. Due to diurnal variation, peak flow rate should be measured at the same time every day. Peak flow rate declines linearly throughout gestation in pregnancy, especially when it is measured in the supine position.

Personal best peak flow rate measurements reach a plateau of 95% predicted levels 3 weeks after the initiation of inhaled corticosteroid therapy. The predicted peak flow rate values for XXXXXXX XXXXXXX and Hispanic patients are 10% lower than reflected in most tables. Accuracy of peak flow meters may decrease over time.

Indications
Indications for peak flow rate measurement are as follows:

Monitoring of asthma
Monitoring effects of ozone and other air pollutants on respiratory function
Monitoring of chronic obstructive pulmonary disease
A recent study indicated some usefulness of peak flow rate measurements in patients with COPD for daily monitoring. Another study used peak flow as a predictor of demise from COPD.

Providing feedback on predicted peak flow rates may improve both perception of respiratory compromise and adherence to controller medications in urban ethnic minority children.
I hope it helps. Stay in touch with your pulmonologist and don't forget to close the discussion please.
May the odds be ever in your favour.
S Khan

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Brief Answer:
PEFR fine and needs symptomatic treatment,

Detailed Answer:
Thank you for getting back to me!
Had you mentioned the symptoms earlier i would have spared you the details of PEFR. Now that you mentioned cold and chest pains on deep breaths, so that is very common in that scenario and indicate some respiratory tract infection and as it involves pleural membranes their pain is felt in the chest muscles like a spasm. and all it needs is some good medicines like antibiotics and decongestants and expectorants.
Your PEFR is perfectly fine and there is nothing to worry about.Just get to a pulmonologist and let him treat your symptoms . You will be good as new sooner than you think.
Take care and close the discussion please.
Regards
S Khan

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