Recently, a woman in Hunan suffered from sudden outbreak of myocarditis and her life was in critical condition. During the rescue, doctors found that the long nail art on her ten fingers was obstructing the operation of the oximeter. After urgently removing the nail art, re monitoring blood oxygen indicators, and adjusting the treatment plan, the woman was finally saved from life-threatening situations. Related topic # Women's sudden cardiac arrest due to inability to detect blood oxygen levels in nail art # Appears on the hot search list, sparking discussions among netizens on why nail art affects rescue efforts? What 'health alerts' can our nails issue? This article explains why nail art can cause the blood oxygen meter to malfunction. Blood oxygen is usually measured by a finger clip oximeter, which uses red and infrared light to penetrate the nail (toe) to monitor the patient's blood oxygen saturation. Nail art may cause invalid measurement results. Nail polish may form a physical barrier. Nail polish and decorations applied to the nail can form a physical barrier, hindering the instrument's light from penetrating the nail bed and interacting with hemoglobin in the blood, resulting in weakened or distorted blood oxygen meter signals, making it difficult to obtain accurate readings. Nail polish interferes with light absorption of dark color nail polish will absorb a lot of light emitted by the blood oximeter, which is like putting a layer of dark color filter on the front of the instrument, resulting in weak or even distorted light signals received by the instrument, and unable to accurately calculate the light absorption ratio. Small particles in transparent or light colored nail polish will also scatter light, thus affecting the measurement accuracy. In addition to measuring blood oxygen through the nails, capillary filling time (CRT) can also be monitored as an important indicator for evaluating peripheral circulation. During the examination, the doctor lightly presses the patient's nail bed until it turns white and then releases it to record the time it takes for the nail bed to return to pink in order to determine whether the patient's peripheral circulation is normal. Tips for seeking medical attention: Try not to do nail art before seeking medical treatment, or use a removable nail to read the health indicators on the nail. Nail is a window reflecting the overall health status of the body. Abnormal color or shape of the nail may be due to the body's alarm. Clubby fingers or toes may thicken and swell at the end of the finger or toe, and the nail (toe) should be arched and raised from the root to the end. Be alert to cardiovascular or respiratory system diseases. Pale nails on the nail bed as a whole may be due to anemia or malnutrition Manifestations of health issues It is recommended to pay attention to blood routine indicators such as blue and purple nail beds. When patients have problems with heart function, it may lead to insufficient oxygen content in the blood, resulting in a purple appearance of the nails. The horizontal depression of the nails, also known as the "Bo's line", may be caused by recent experiences of high fever, severe infection, severe malnutrition, or mental stress. By measuring the distance from the groove to the nail root, the time of disease occurrence can be roughly estimated (the average monthly growth of nails is about 3 millimeters). A small nail detail may hide a "distress signal" from the body. Pay attention to the "health alert" on the nails to protect life and health from details