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Encyclopedia > Respiratory rate
It has been suggested that this article or section be merged with Minute volume. (Discuss)

The respiration rate is the number of breaths a person takes per minute. The rate is usually measured when a person is at rest and simply involves counting the number of breaths for one minute by counting how many times the chest rises. Respiration rates may increase with fever, illness, and with other medical conditions. When checking respiration, it is important to also note whether a person has any difficulty breathing. Wikipedia does not have an article with this exact name. ... Minute Volume Minute volume is the volume of air which can be inhaled(inhaled minute volume) or exhaled(exhaled minute volume) from a persons lungs in one minute. ... See Fever for the Kylie Minogue album; Fever is also a song by Otis Blackwell. ...


There is only limited research relating to monitoring respiratory rate, and these studies focused on issues such as the inaccuracy of respiratory rate measurement and respiratory rate as a marker for respiratory dysfunction.

Contents


Measurement

Inaccuracies in respiratory measurement have been reported in the literature. One study compared respiratory rate counted using a 15 second count period, to a full minute, and found significant differences in the rates. Respiratory rates measurement in children under five years, for a 30 second or 60 second period, suggesting the 60 seconds resulted in the least variability. Another study found that rapid respiratory rates in babies, counted using a stethoscope, were 20% to 50% higher than those counted from beside the cot without the aid of the stethoscope. Other factors that increase respiratory rate is holding your breath. The longer you hold it for, the respiratory rate increases. Stethoscope The stethoscope (Greek στηθοσκόπιο, of στήθος, stéthos - chest and σκοπή, skopé - examination) is an acoustic medical device for auscultation, i. ...


Diagnostic value

The value of respiratory rate as an indicator of potential respiratory dysfunction has been investigated but findings suggest it is of limited value. One study found that only 33% of people presenting to an emergency department with an oxygen saturation below 90% had an increased respiratory rate. An evaluation of respiratory rate for the differentiation of the severity of illness in babies under 6 months found it not to be very useful. Approximately half of the babies had a respiratory rate above 50 breaths per minute, thereby questioning the value of having a "cut-off" at 50 breaths per minute as the indicator of serious respiratory illness. It has also been reported that factors such as crying, sleeping, agitation and age have a significant influence on the respiratory rate. As a result of these and similar studies the value of respiratory rate as an indicator of serious illness is limited. Oxygen saturation is a relative measure of the amount of oxygen that is dissolved or carried in a given medium. ... Tears trickling down the cheeks Lacrimation is the bodys process of producing tears, which are a liquid to clean and lubricate the eyes. ... In an ideal situation, sleep should be undisturbed and experienced in the same room every night Sleep is the regular state of natural rest observed in all mammals, birds and fish. ...


Normal findings

Normal respiratory rate in a healthy adult is between 12 to 20 breaths per minute. (With such a slow rate, it is best to count the number of breaths over a full minute for accuracy.)


Respiratory rhythm should be regular.


Respiratory depth (as seen in the amplitude or excursion of chest wall movement) should also be the same between breaths.


Regular respiratory rate, rhythm, and depth are interrupted occasionally by a large breath (called a “sigh”) in normal subjects.


Normal respiratory rates, by age:

  • Newborns: Average 44 breaths per minute
  • Infants: 20-40 breaths per minute
  • Preschool children: 20-30 breaths per minute
  • Older children: 16-25 breaths per minute
  • Adults: 14 to 18 breaths per minute
  • Older Adults 19-26 breaths per minute.

Abnormal findings

Hyperventilation/tachypnea

Hyperventilation is breathing more than necessary, while tachypnea is breathing more than normal. (Although there are slight differences between the two terms, they are sometimes used interchangeably.) In medicine, hyperventilation (or hyperpnea) is the state of breathing faster or deeper (hyper) than necessary, and thereby reducing the carbon dioxide concentration of the blood below normal. ... Tachypnea is a medical term for breathing which is more rapid than normal. ...


They are seen in a wide variety of clinical conditions including:

Fever is also the name of an album by Kylie Minogue. ... Congestive heart failure (CHF) (also called congestive cardiac failure and heart failure) is the inability of the heart to pump a sufficient amount of blood throughout the body, or requiring elevated filling pressures in order to pump effectively. ... Pulmonary edema is swelling and/or fluid accumulation in the lungs. ... In medicine, metabolic acidosis is a state in which the blood pH is low (under 7. ... For the album, see Hysteria (album) Hysteria is a diagnostic label applied to a state of mind, one of unmanageable fear or emotional excesses. ... Exertion is a concept describing the use of physical or perceived energy. ... See Fever for the Kylie Minogue album; Fever is also a song by Otis Blackwell. ... Pain is an unpleasant sensation which may be associated with actual or potential tissue damage and which may have physical and emotional components. ... Acute respiratory distress syndrome (ARDS), also known as respiratory distress syndrome (RDS) or adult respiratory distress syndrome (in contrast with IRDS) is a serious reaction to various forms of injuries to the lung. ... Congestive heart failure (CHF) (also called congestive cardiac failure and heart failure) is the inability of the heart to pump a sufficient amount of blood throughout the body, or requiring elevated filling pressures in order to pump effectively. ... This article discusses the medical condition. ... Hyperthyroidism (or overactive thyroid gland) is the clinical syndrome caused by an excess of circulating free thyroxine (T4) or free triiodothyronine (T3), or both. ... Pneumonia is an illness of the lungs and respiratory system in which the microscopic, air-filled sacs (alveoli) responsible for absorbing oxygen from the atmosphere become inflamed and flooded with fluid. ... Abdominal distension (or Distended abdomen) can be a sign of many other conditions, including: diverticulitis lactose intolerance obstructed bowel premenstrual syndrome pregnancy weight gain See also Gastric distension Bloating External links University of Maryland MedlinePlus/NIH Categories: | ... Chronic obstructive pulmonary disease (COPD) is an umbrella term for a group of respiratory tract diseases that are characterised by airflow obstruction or limitation. ... In medicine (pulmonology), a pneumothorax or collapsed lung is a medical emergency caused by the collapse of the lung within the chest cavity. ...

Bradypnea

Bradypnea is an abnormally slow breathing rate. Causes include: Bradypnea refers to an abnormally slow breathing rate. ...

Uremia is a toxic condition resulting from renal failure, when kidney function is compromised and urea, a waste product normally excreted in the urine, is retained in the blood. ... Intracranial pressure, or ICP, is the pressure of the brain, Cerebrospinal fluid (CSF), and the brains blood supply within the intracranial space. ... In chemistry, alcohol is any organic compound in which a hydroxyl group (-OH) is bound to a carbon atom, which in turn is bound to other hydrogen and/or carbon atoms. ... Benzodiazepine tablets The benzodiazepines are a class of drugs with hypnotic, anxiolytic, anticonvulsant, amnestic and muscle relaxant properties. ... Drug use may mean or refer to: Drug abuse Medication Recreational drug use This is a disambiguation page: a list of articles associated with the same title. ... See Morphia for the Dutch metal band. ...

Other abnormalities

Absence of respiration (respiratory rate equals zero) is called apnea. Apnea (British spelling - apnoea) (Greek απνοια, from α-, privative, πνεειν, to breathe) is a technical term for suspension of external breathing. ...


An example of abnormal respiratory rhythm and pattern is Cheyne-Stokes breathing seen in some comatose (unconscious) patients affected by disease of the central nervous system. In Cheyne-Stokes breathing there is a cyclical change in respiratory depth from increase to decrease interrupted by apnea. Cheyne-Stokes respiration is an abnormality of the pattern of breathing. ... A diagram showing the CNS: 1. ...


See also

Dyspnea (Latin dyspnoea, Greek dyspnoia from dyspnoos - short of breath) or shortness of breath (SOB) is perceived difficulty breathing or pain on breathing. ... ...

External links

  • Measurement
  • FPNotebook

  Results from FactBites:
 
Inspection - Abnormal Respiratory Rates And Patterns (1168 words)
Variation in respiratory rates and patterns in children and infants is a normal, healthy response to excitement, emotion or exertion.
Respiratory rate is primarily controlled by the respiratory centers in the pons and medulla.
Although the exam of the respiratory system is important when the chief complaint is an abnormal respiratory rate or pattern, emphasis should also be on the general survey, and gastrointestinal, cardiovascular, and head and neck examinations.
Respiratory rate - Wikipedia, the free encyclopedia (628 words)
Respiratory rates measurement in children under five years, for a 30 second or 60 second period, suggesting the 60 seconds resulted in the least variability.
Another study found that rapid respiratory rates in babies, counted using a stethoscope, were 20% to 50% higher than those counted from beside the cot without the aid of the stethoscope.
An evaluation of respiratory rate for the differentiation of the severity of illness in babies under 6 months found it not to be very useful.
  More results at FactBites »


 

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