The carbon monoxide monitor is not only used in smoking cessation clinics for smoking intervention testing but may also be used in the Emergency Room as a carbon monoxide breath test for carbon monoxide poisoning. When a patient is admitted to the Emergency Room in a dazed, incoherent, or unconscious state, a carbon monoxide monitor could be used to perform an immediate non invasive carbon monoxide test. The carbon monoxide breath test will give the same results as a carboxyhemoglobin blood test.

A Carbon monoxide monitor can give immediate results of carbon monoxide poisoning from a single exhale of breath from the patient without having to wait for lab results. The carbon monoxide monitor is an important device in the diagnosis of smoke inhalation, faulty furnaces, or any other type of environmental carbon monoxide poisoning. The carbon monoxide monitor is a simple screening for carbon monoxide testing. The breath carbon monoxide monitor has been shown to be an effective tool in predicting smoking habits.

The Smokerlyser is a battery powered Breath Carbon Monoxide Monitor that has been designed to be used with people who want to stop smoking. The Smokerlyser is designed as a simple screening test for cigarette consumption. Giving an instant indication of CO levels in PPM.

The Smokerlyser helps the smoker to quit by providing visible proof of damaging CO levels and charting the progress during the cessation therapy.

Some of the features are:
  • Motivates smokers to quit
  • Easy to read displays - LCD / LED / Bar Graph
  • Readings in ppmCO and %COHb
  • Auto-Zero and breath-hold countdown timer
  • Easy to use and calibrate (by non-technical personnel)
  • Uses inexpensive disposable mouthpieces
  • Supported by a wide range of quit smoking resources/programmes

The smokerlyser measures the Carbon Monoxide in the breath simply by blowing into the monitor, using the hygienic disposable mouthpieces. The mouthpiece connects to a T-piece, which can also be replaced when required. A reading of CO, in ppm and %COHb, is shown within seconds on the display. When charting a smokers progress the display gives an instant visual indication of how well they are doing.

The display also shows user text messages to aid in the operation and maintenance of the instrument.



The units are easy to use and only requires a calibration check once every 6 months, which is easy to achieve with a calibration kit. The LCD provides text messages to guide the user through the calibration procedure. No specialist technical knowledge or skills are required.

The CO monitor has been shown to be an immediate,non-invasive, simple and effective test of confirming a patient's smoking status. It works well in most settings, although adjustments must be made in the interpretation of results. The best cut-off breath CO level for the determination of smoking status is 5 ppm as it gives the best sensitivity and specificity. As there is a clustering of CO levels in individuals who smoked within the last five hours, this cut-off level may be a useful adjunct in detecting smoking status in individuals who have smoked within the last five hours. However, it is lower than the usual 6 to 10 ppm, as recommended by some studies. Middleton and Morice reported a cut-off level of 6 ppm in 94% of smokers and 96% of non-smokers in a respiratory outpatient clinic. Jarvis and Crowley demonstrated that a cut-off breath CO level of greater than 8 ppm is strongly associated with self- reports on smoking, while Tonnesen and Jorenby used 10 ppm as a cut-off.



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