CN2317811Y - Automatic synchronous negative-pressure sampling device for biopsy - Google Patents

Abstract

The utility model relates to an automatic synchronous negative-pressure sampling device for biopsy, which mainly installs a press-button on a draw rod sheathed with a draw rod spring so that the draw rod can do telescopic motion on a press-button base, the front end of a piston rod fixed to the press-button base is sheathed with a rubber piston, a needle cylinder is sheathed outside the piston rod, and a needle cylinder fixing claw is arranged outside the needle cylinder. When moving forward under the action of the spring, the draw rod can impact the needle cylinder fixing claw to drive the needle cylinder to move forward so that negative-pressure is generated in the needle cylinder, and the aim of automatic synchronous negative-pressure sampling for biopsy is achieved. The utility model has the advantages of high success ratio of puncture, little complication, constant negative-pressure, easy operation, etc.

Description

Automatic synchronous negative-pressure sampling device for biopsy

This utility model relates to a kind of sampling device for biopsy of automatic synchronous negative-pressure.

Chinese patent (ZL93235456.4) discloses a kind of " novel negative pressure formula percutaneous parenchymal viscera sting device ".Though this device has advantages such as puncture success rate height, complication are few, because this device still needs bimanualness to finish puncture, still have certain inconvenience in the use, and piercing process is that manual inserting needle is operated.

The purpose of this utility model is to provide a kind of puncture success rate height, complication few, can finish the automatic inserting needle of one-handed performance, produce the automatic synchronous negative-pressure sampling device for biopsy of negative pressure synchronously.

This utility model is achieved through the following technical solutions: it is to be made of pull bar holding screw, bracket base, pull bar, button base, button, push-button reset spring, piston rod, pull-rod spring, trocar sheath, syringe, syringe fixed claw, trocar sheath front connector, trocar pull hook and shock-resistant member.The upper end of Tiebar structure is two stocks, the lower end is the hollow circular-tube of band convex edge, respectively have a groove at the middle part of two stocks, two stocks of pull bar are hooked on the bracket base by the pull bar holding screw, the button base is positioned at the below of bracket base, the button base axially on have two symmetrical grooves, two stocks of pull bar drop on respectively in these two grooves, and can in groove, slide up and down, between two grooves, establish a button radially going up of button base, the button below is provided with the push-button reset spring, and button is provided with draw-in groove, and rod outer sleeve has pull-rod spring, behind pulling pull bar compression pull-rod spring, draw-in groove can be stuck in the groove of two pull bars, actuation button, and pull bar can travel forward under the driving of pull-rod spring.Fix a piston rod at the circle centre position of button base, the piston rod front end is with rubber piston, be positioned at pull bar heart piston rod and be with syringe outward, syringe is equipped with the syringe fixed claw outward, be with trocar sheath outside pull-rod spring, quill has two symmetric grooves to the place ahead of tube wall outside, and outer sleeve upper is connected with the button base, the lower end is connected with the trocar sheath front connector, and the hollow internal diameter of trocar sheath front connector is slightly less than the external diameter of syringe fixed claw.After pulling out pull bar and retracting syringe, pressing button can impact the syringe fixed claw when pull bar travels forward, and drives syringe and piston rod and produces relative motion and form negative pressure, and syringe drives the puncture needle quick needle insertion, realizes the purpose of automatic synchronous negative-pressure biopsy sampling.

Adopting this utility model to carry out the aspiration biopsy sampling compares with other sting device, paracentesis and has the following advantages:

(1) processing ease: use this device to carry out percutaneous parenchymal viscera when puncture, only need click button when inserting needle, puncture needle is inserting needle and formation negative pressure automatically synchronously just, aspirate out tissue, operate very simply, understand at a glance, easy to learn, do not need specialized training just can manipulate.

(2) negative pressure is constant: because negative pressure is constant during each suction, so organizing of extracting is complete evenly, and can be because of artificial negative pressure is not too early, late excessively, excessive, too small can the suction, or make that tissue pushes, fracture phenomena.

(3) success rate height: because operational approach is simple, grasp easily, negative pressure is constant, and can avoid because of two people operate cooperation inadequately tacit agreement or one man operation's both hands cooperate the bad failure that causes, further improved the success rate that punctures.

(4) complication is few: when using this device to puncture, owing to adopted No. 16 puncture needles (tradition adopts No. 18 puncture needles), and inserting needle speed fast (only 1/10 second), thus little to tissue injury, further reduced the generation of complication.

In order to make this utility model structure clear more complete, this utility model device is described further below in conjunction with accompanying drawing.

Fig. 1 forms preceding positive sectional structure sketch map for this utility model negative pressure.

Fig. 2 just dissects structural representation for this utility model negative pressure after forming.

Fig. 3 is the side sectional structure sketch map of this utility model negative pressure after forming.

As shown in the figure: this utility model mainly is made of pull bar holding screw 1, bracket base 2, pull bar 3, button base 4, button 5, push-button reset spring 6, piston rod 7, pull-rod spring 8, trocar sheath 9, syringe 10, syringe fixed claw 11, trocar sheath front connector 12, trocar drag hook 13, puncture needle inner core 14, puncture needle 15, the trocar 16, trocar retainingf key 17, shock-resistant member 18.The upper end of pull bar 3 is two stocks 3.1, the lower end is the hollow circular-tube 3.2 of band convex edge 3.4, on two stocks 3.1, respectively have a groove 3.3, two stocks 3.1 of pull bar 3 are hooked on the bracket base 2 by pull bar holding screw 1, button base 4 is positioned at the below of bracket base 2, between button base 4 and bracket base 2, be provided with shock-resistant member 18, button base 4 axially on have two symmetrical grooves, two stocks 3.1 of pull bar 3 drop on respectively in these two grooves, and can in groove, slide up and down, being located axially between two grooves of button base 4, be provided with button 5 and push-button reset spring 6, be provided with draw-in groove 5.1 on button 5, when pulling out pull bar 3, button draw-in groove 5.1 can be stuck in the groove 3.3 of two stocks of pull bar 3.Circle centre position at button base 4 connects a piston rod 7, front end at piston rod 7 is provided with rubber piston 7.1, outside pull bar 3 heart piston rods 7, be with syringe 10, the syringe 10 outer syringe fixed claws 11 that are provided with, outside pull bar 3, be with pull-rod spring 8, the lower end of pull-rod spring 8 is supported on the convex edge 3.4 of pull bar 3, its upper end acts on the bottom of button base 4, outside pull-rod spring 8, be with trocar sheath 9, quill has two symmetric grooves 9.1 on tube wall outside, the upper end of trocar sheath 9 is threaded with button base 4, the lower end is threaded with trocar sheath front connector 12, the hollow internal diameter of trocar sheath front connector 12 is slightly less than the external diameter of syringe fixed claw 11, and trocar pull hook 13 is housed in the trocar sheath front connector 12.

In order to reduce the inserting needle resistance, alleviate patient's misery, do not produce " agnail " phenomenon during puncture, adopt Chinese patent ZL93235456.4 to go up disclosed bimodal outer worn out pricker, adopt unimodal interior worn out pricker and puncture needle inner core to implement puncture as the capable skin penetrating of the trocar.

Using method of the present utility model (is example with the kidney puncture):

(1) prostrate on examining table after the patient urinates, position is rectified, and before two upper limb placed head, epigastrium both sides of the chest side of body underlay was with hard pillow, with the restriction kidney when the puncture to lower slider.

(2) site of puncture routine disinfection, drape position with the B ultrasonic positioning probe, generally get right inferior pole of kidney and puncture.Earlier carry out local anaesthesia, do deep needle track anesthesia with one No. 7 elongated syringe needles then, up to kidney peplos place, kidney surface, measure skin kidney distance, and determine the degree of depth of inserting needle according to the skin kidney distance of verifying at point of puncture skin.

(3) the puncture needle inner core is inserted in the unimodal interior worn out pricker, be connected on the front end of automatic synchronous negative-pressure sampling device for biopsy, pull bar pulled out block, syringe is moved the end to, and with worn out thorn syringe needle in unimodal, insert in the sterilization normal saline, by groove the syringe fixed claw is slowly pushed ahead, normal saline just can suck in the syringe, holds up puncture needle, retract syringe, the air in the syringe of emptying for several times is stand-by repeatedly.

(4) according to the distance of determining inserting needle, trocar retainingf key is fixed on the trocar, the bimodal outer mill trocar is thrust skin together with nook closing member from the point of puncture of B ultrasonic ultrasound guided probe, then under the guiding of B ultrasonic slowly inserting needle to the kidney peplos place, take out nook closing member, change be in negative pressure before forming automatic synchronous negative-pressure sampling device for biopsy and unimodal in worn out pricker (having inserted inner core), make it to coincide, and with the trocar pull hook pulling trocar with the trocar.

(5) patient's right hand is held automatic synchronous negative-pressure sampling device for biopsy, and thumb places the button place, makes patient breathe at dark end inspiratory pause, patient's pressing button, puncture needle thrust kidney rapidly, and moment forms negative pressure synchronously, soon the negtive-pressure implement puncture needle is extracted in the lump together with the trocar, puncture finishes.Self-pressing button puncture needle thrusts kidney to extracting the negtive-pressure implement puncture needle less than 1 second.Pushed 15 minutes the part after going out pin, burns pinprick with 1～2% iodine tincture, fixes with adhesive bandage.

(6) discriminating has or not the method that is drawn into nephridial tissue: when extracting puncture needle, as silent, show and puncture successfully, nephridial tissue has been pumped in puncture needle inner core below, as hear that there is suction air sound at the puncture needle place when going out pin, normal expression is worn sky and is not drawn into the kidney biological tissue, but repeated puncture.

Claims (3)

1. automatic synchronous negative-pressure sampling device for biopsy, it is characterized in that: it is to be made of pull bar holding screw, bracket base, pull bar, button base, button, push-button reset spring, piston rod, pull-rod spring, trocar sheath, syringe, syringe fixed claw, trocar sheath front connector and shock-resistant member.The pull bar upper end is two stocks, the lower end is the hollow circular-tube of band convex edge, on two stocks, respectively have a groove, two stocks of pull bar are hooked on the bracket base by the pull bar holding screw, the button base is positioned at the below of bracket base, the button base axially on have two symmetrical grooves, two stocks of pull bar drop on respectively in these two grooves, and can in groove, slide up and down, between two grooves, establish a button radially going up of knob base, button is provided with draw-in groove, when pulling out pull bar, draw-in groove can be stuck in the groove of two pull bars, fix a piston rod at the circle centre position of button base, the piston rod front end is with rubber piston, outside pull bar heart piston rod, be with syringe, syringe is equipped with the syringe fixed claw outward, at rod outer sleeve pull-rod spring is arranged, outside pull-rod spring, be with trocar sheath, quill has two symmetrical grooves to the place ahead of tube wall outside, outer sleeve upper is connected with the button base, and the lower end is connected with the trocar sheath front connector, and the hollow internal diameter of trocar sheath front connector is slightly less than the external diameter of syringe fixed claw.

2. the synchronous sampling device for biopsy of automatic negative-pressure according to claim 1 is characterized in that: be provided with shock-resistant member between button base and bracket base.

3. the synchronous sampling device for biopsy of automatic negative-pressure according to claim 1 and 2 is characterized in that: trocar drag hook is housed in the trocar sheath front connector.

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