Blood vessel finder

Abstract

The invention relates to a blood vessel finder, which comprises a light supply apparatus, an imaging device, a processing device and a displaying device, wherein the light supply apparatus comprises a narrow-band LED (Light Emitting Diode) light source module formed by a narrow-band LED light source containing a plurality of different centre wavelengths; the imaging device comprises an image sensor, and the surface of a photosensitive element of the image sensor is covered with an array type multi-channel narrow-band filter layer; and the displaying device comprises a display. The blood vessel finder of the invention has the advantages that 1, the disadvantage of an infrared imaging technique that the infrared light has relative blurring effect and high light scattering effect in other tissue blood vessels is overcome, the blood vessels in a deeper position can be penetrated, the positions of fine and difficultly detected shallow vein blood vessels can be found accurately and in time,and the blood vessel finder has small size and low cost; and 2, noise signals irrelevant to blood vessel images are eliminated, the signal to noise ratio is increased, the visual contrast and the contrast ratio between the blood vessels to be measured and the surrounding tissues are improved, the contrast ratio and the objective accuracy of blood vessel images are improved greatly, and the targetblood vessel can be found more accurately and sensitively.

Description

technical field [0001] The invention relates to a blood vessel finder, in particular to a multispectral superficial vein blood vessel finder. Background technique [0002] Intravenous injection is the most basic and frequent medical treatment in clinical practice, and medical staff need to perform a large number of acupuncture operations. At present, medical personnel take punctures under direct vision to inject drugs, provide infusions, and insert catheters to patients. The medical staff must first locate the blood vessel to be punctured. If the blood vessel on the patient’s body surface is thick and well filled, the operator can directly locate the blood vessel puncture point with the naked eye, and the puncture is easy to succeed; Due to poor filling of blood vessels on the body surface, thin blood vessels, and thick subcutaneous fat (such as the elderly, infirm, children, obese people, etc.), the operator cannot directly see the blood vessels to be punctured. Skilled op...

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