Portable pulse oximeter

The utility model discloses a portable pulse oximeter in the technical field of pulse measurement equipment, which comprises a casing, a first T-shaped groove is arranged in the center of the top of the casing, a protective sleeve with a U-shaped vertical section is sleeved on the outer wall of the casing, a drying piece is arranged in the center of the bottom of the casing, and a movable rod is movably inserted into the top of a fixed rod. The anti-skidding sleeve is arranged, so that the hand-holding carrying comfort of a user is improved, the probability that the hand slips and falls off and is broken is reduced, the protective sleeve is arranged, and when the anti-skidding sleeve falls off or is impacted during carrying, the anti-skidding sleeve is not prone to slipping off, so that the anti-skidding sleeve is convenient to use. The inner rubber layer and the outer rubber layer are well buffered, meanwhile, the buffer performance is improved through the elastic filler layer, the sponge layer is arranged t