Bone marrow aspiration needle

The purpose of the utility model is to provide a puncture needle for bone marrow aspiration with simple structure, easy operation, one-time puncture and immediate completion of marrow extraction, and easy control of aspiration speed and aspiration volume.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is the bone marrow aspiration puncture needle, which is composed of a cylindrical needle, a needle holder, a needle core, a syringe barrel, a syringe piston, and a syringe piston rod. It is installed in the syringe barrel, and the needle core is installed in the cylindrical needle. The needle seat of the needle is installed on the front end seat of the micro{{0}}syringe cylinder, the end of the needle core seat is fixed in the suction port at the end of the micro-syringe cylinder, and is fixed by bonding, and the hollow cavity of the needle core is communicated with the inner cavity of the micro-syringe cylinder, and the The micro-syringe is equipped with a sliding piston. The micro-syringe is a sealed syringe. A syringe barrel is juxtaposedly fixed on the outer wall of the micro-syringe. The upper end of the syringe barrel is provided with a side wall hole, which is connected with the side wall of the upper end of the micro-syringe. The holes are connected. When performing bone marrow puncture, the micro-syringe is pressurized by pulling the piston rod of the syringe, so that the sliding piston is pressed against the bottom of the front end of the micro-syringe. When the puncture is successful, the stable cylindrical needle does not rotate, and the needle core rotates. 90 degrees, so that the elliptical suction hole on the back of the oblique plane of the needle core faces the side of the oblique surface of the cylindrical needle. At this time, the elliptical suction hole can be exposed, and then push the syringe piston rod, the syringe piston moves down , so that negative pressure is formed in the micro-syringe, the sliding piston moves up, and the marrow fluid is immediately drawn into the micro-syringe. The utility model also adopts the following measures to implement that the radius of the syringe barrel is larger than the radius of the micro barrel, so that the suction volume reading can be amplified. For example, when the height of the syringe barrel is 0.1mm and the radius is 30mm, if the If the radius of the syringe is 3mm, the height on the micro-syringe can be enlarged to 10mm, which is convenient to observe the suction volume in time. The front end of the needle core is provided with an end cap, and the middle of the end cap is provided with a vent hole; the hollow cavity of the needle core has a diameter of 1mm, the outer diameter is consistent with the inner diameter of the cylindrical needle, and the wall thickness is 0.3mm. A puncture depth stop ring is also provided to control the puncture depth.

If you have any questions, please contact us. Our company can produce various customized needles, medical needles, puncture needles, hypodermic needles, biopsy needles, vaccine needles, injection needles, syringe needles, veterinary needles, pencil point needle, ovum pick up needles, spinal needles, etc. If you need customized needle products, please contact us. We look forward to your inquiry! The quality of the products manufactured in our factory will surely satisfy you!

Please contact us if you need: zhang@sz-manners.com