The use and regulation of pulse oximeters (information for healthcare professionals)

AI Summary

The UK Medicines and Healthcare products Regulatory Agency (MHRA) has issued guidance regarding the use and accuracy of pulse oximeters. While these devices are essential for non-invasive blood-oxygen monitoring, various factors can influence their precision. A significant point of focus is that patients with darker skin pigmentation may receive slightly overestimated oxygen saturation readings compared to those with lighter skin. Other accuracy-impacting factors include low blood circulation, movement, nail polish, henna, tattoos, and improper probe placement. Under the regulatory framework of the UK Medical Device Regulations 2002, all pulse oximeters must meet strict safety standards, such as BS EN ISO 80601-2-61:2019, and carry valid UKCA or CE marks. Manufacturers are required to report serious incidents to the MHRA to ensure ongoing safety monitoring. Required actions for clinicians include prioritizing relative changes in oxygen levels over absolute values, ensuring proper device fit, and accounting for skin tone variations during interpretation. For the general public, the MHRA advises against home use unless supervised by a healthcare professional. All users are encouraged to report device performance issues or adverse incidents through the Yellow Card scheme or local reporting systems. The guidance emphasizes that while oximetry is not perfectly precise, it remains a vital tool for tracking clinical trends when used correctly.