Cardiac data CER analysis

Claim: My respiratory measurements fall within healthy resting ranges, suggesting my lungs are oxygenating my blood normally.\n\nEvidence: My blood-oxygen saturation on the pulse oximeter read 98 percent, inside the normal 95 to 100 percent range. My respiratory rate was 14 breaths per minute, within the typical resting range of 12 to 20 breaths per minute.\n\nReasoning: A saturation of 98 percent means nearly all of the hemoglobin in my blood is bound to oxygen, which happens when air reaches the alveoli and oxygen diffuses across the thin alveolar walls into the capillaries. A rate of 14 breaths per minute shows the brainstem is triggering breaths at a steady pace, moving enough fresh air in and carbon dioxide out to keep that saturation high without the body working harder. Both values being normal indicates that airflow, gas exchange, and the neural drive to breathe are coordinated the way healthy resting physiology predicts.\n\nFactor that could change the readings: If I had cold hands or nail polish on the finger under the sensor, the pulse oximeter could read low even with healthy lungs, because the device measures light passing through the tissue and poor blood flow or a blocking layer distorts that signal. In that case the number would reflect a measurement problem, not my actual respiratory function.