Pulse Oximetry is a simple non-invasive method of monitoring the percentage of haemoglobin, which is saturated with oxygen. The pulse oximeter consists of a probe attached to the patients finger or ear lobe, which is linked to a computerised unit. The unit displays the percentage of Hb saturated with oxygen together with an audible signal for each pulse beat and a calculated heart rate. An oximeter detects hypoxia before the patient becomes clinically cyanosed.

Pulse oximetry is a non-invasive method of measuring hemoglobin saturation. Being non-invasive, it does not require a blood sample to obtain a result. It uses spectrophotometry to measure hemoglobin saturation. It uses two wave lengths of light, one red and one infrared. Pulse oximeters use two light emitting diodes to transmit light through a capillary bed to a silicone photodiode detector.

Pulse Oximetry Device is a medical device that indirectly measures the oxygen saturation of a patient's blood (as opposed to measuring oxygen saturation directly through a blood sample) and changes in blood volume in the skin, producing a photoplethysmograph. It is attached to a medical monitor to see a patient's oxygenation at all times. Most monitors also display the heart rate. Portable, battery operated pulse oximeters are also available for home blood oxygen monitoring. A blood-oxygen monitor displays the percentage of arterial hemoglobin in the oxyhemoglobin configuration. Acceptable normal ranges are from 95 to 100 percent, although values down to 90% are common. For a patient breathing room air, at not far above sea level, an estimate of arterial pO2 can be made from the blood-oxygen monitor SpO2 reading. A pulse oximeter is a particularly convenient non-invasive measurement instrument and has a pair of small light-emitting diodes (LEDs) facing a photodiode through a translucent part of the patient's body, usually a fingertip or an earlobe. One LED is red, with wavelength of 660 nm, and the other is infrared, 905, 910, or 940 nm. Absorption at these wavelengths differs significantly between oxyhemoglobin and its deoxygenated form, therefore from the ratio of the absorption of the red and infrared light the oxy/deoxyhemoglobin ratio can be calculated. The absorbance of oxyhemoglobin and deoxyhemoglobin is the same (isosbestic point) for the wavelengths of 590 and 805 nm.

Pulsed lavage system provides irrigation to remove bacteria in a complex musculoskeletal wound. It is used by physicians to cleanse the surgical site during total joint arthroplasty. It uses a separate suction lumen to reduce clogging and an ergonomic handle design to minimize hand fatigue.

Pulse meter is used to measure the blood flow rate in the finger or earlobe by shining light into the skin and sensing changes in light density in the photoelectric sensor; the pulsemeter then calculates and display the rate in bpm.