CN103007416A - Percutaneous renal puncture expansion tube with changeable front end shape - Google Patents

Abstract

The invention discloses a percutaneous renal puncture expansion tube with a changeable front end shape. The percutaneous renal puncture expansion tube is sheathed on an expander through a sheath and the expander is sheathed on an inner core in a movable fit way. The front end of the expander is of the shape of a cone which is obtained by folding a cylinder or is of the shape of a cone consisting of arch-surface triangles which are obtained through cutting, have equal sides and have circular-arc-shaped bases. The length of the expander is equal to the length of the inner core. The sheath is shorter than the expander. Scale marks and a male thread which is equilong and is twisted with a female thread in an inner core nut. In a static state, an expander handle is overlapped with a sheath handle; and in use, the inner core nut is rotated, the female thread in the inner core nut is twisted with the male thread on the expander, and the conical front end of the expander is gradually expanded to become cylindrical under the forwards pushing force of the inner core. The sheath is guided to reach an accurate position, the pains of a patient are reduced, the damages to surrounding tissues are reduced and the puncture success rate is improved.

Description

A kind of percutaneous renal puncture convergent divergent channel of front end shape variable

Technical field

The invention belongs to medical mechanical domain, especially relate to a kind of percutaneous renal puncture convergent divergent channel of front end shape variable.

Technical background

Percutaneous renal puncture is that Urology Surgery is widely used, and very important treatment means it be the basis of percutaneous kidney minimally-invasive treatment renal calculus, to use special-purpose puncture instrument, under the location and guiding of B ultrasonic or X-ray, the doctor is in strict accordance with standard operating procedure, exactly with the cylindric epitheca of diameter grade, insert the homonymy renal pelvis through lower back skin, thereby set up renal pelvis and external treatment passage, want successfully epitheca to be entered renal pelvis through the lower back placed, making tissue injury very little, is extremely difficult.Therefore, the success of percutaneous renal puncture not only needs the puncture technical ability of doctor's climax, and need to relate to good a complete set of puncture instrument.

The operating procedure of tradition percutaneous renal puncture apparatus is as follows:

1.B overdetermination position: B ultrasonic localised puncture point, puncture direction and paracentesis depth;

2. puncture: the point of puncture incision of skin, with the elongated metallic sheath bobbin by inner core, according to point of puncture and the direction puncture that B ultrasonic is determined, reach the determined degree of depth after, extract inner core, the urine outflow is arranged, then puncture successfully;

3. insert seal wire: after puncturing successfully, the thin wire guide of front end softness along the trocar, is entered renal pelvis, enter the long 5-7cm of the Length Ratio trocar, then the trocar is extracted;

4. passage expansion: with the tapered hollow dilator of front end, the determined degree of depth of B ultrasonic in seal wire inserts renal pelvis is first with the thin dilator of diameter, progressively use the thick dilator of diameter instead, the dilator that last root diameter is thick, its overcoat have a cylindrical shape epitheca, and its Length Ratio is short expansionary phase.

5. extract the thick dilator of last root diameter: after last root dilator is expanded successfully, next will extract dilator exactly, and stay epitheca in passage.

Traditional puncture operation usually in the end one is walked out of existing failure, reason is: the Length Ratio dilator of epitheca is short, on one side dilator is pulled out backward, on one side when epitheca inserted forward, the degree of depth is difficult to control, on the other hand, because the front end of epitheca is circular, with the dilator front end again not at same plane, epitheca is during to interpolation, the edge of epitheca can damage surrounding tissue or damage nephridial tissue, causes passage hemorrhage, is difficult to carry out next step treatment and operation.

Summary of the invention

The purpose of this invention is to provide a kind of front end shape variable percutaneous renal puncture extension tube, the shape of convergent divergent channel front end becomes cylindrical shape by taper shape, easily and accurately guides epitheca to push ahead the arrival accurate location before convergent divergent channel is extracted.

A kind of front end shape variable percutaneous renal puncture convergent divergent channel of the present invention, it is characterized in that convergent divergent channel by cylindric outer sheath on cylindric dilator, cylindric dilator is enclosed within on the hollow cylinder inner core movingly and consists of; It is characterized in that the dilator front end is that the cylindrical shape folding is processed into the taper shape that taper shape or the cylindrical shape cutting arch face triangle that to be processed into three to six isosceles, bases be circular arc consists of; The interior diameter and the inner core overall diameter that it is characterized in that dilator are movingly, and the interior diameter of dilator overall diameter and epitheca is movingly; The handle end that it is characterized in that dilator is processed with the 2cm external screw thread, and the dilator handle front end is fixed with scale mark, and the length of dilator front end is 2cm; The equal in length that it is characterized in that inner core and dilator, the end of inner core is fixed with nut, and the isometric twist of external screw thread of 2cm female thread and dilator end is arranged in the nut; It is characterized in that the Length Ratio dilator handle of epitheca to the short 2cm of the distance of its front end, when static, the epitheca handle overlaps with dilator handle; It is characterized in that material adopts harder metal material or plastic-steel, lucite, resin material.

When static, outer sheath is on dilator, dilator is enclosed within on the inner core, and all be movingly, the epitheca handle overlaps with dilator handle, and the dilator front end is exposed at outside the epitheca front end, and the front end of inner core is apart from dilator your 2cm that moves the capital to another place, the terminal nut of inner core and dilator external screw thread are contact conditions, and scale mark is blocked by epitheca.

During use, the strength of pushing ahead because rotating the heart nut, the front end of inner core begins to promote dilator front end (taper shape) and struts gradually and become cylindrical shape, until the front end of the front end of inner core and dilator is on same " zero " plane, female thread in the inner core nut is screwed in twist on the dilator external screw thread fully, then the inner core nut contacts with dilator handle, then be advanced into 2cm scale mark place on the dilator with epitheca handle forward end direction, at this moment, epitheca front end, dilator front end and inner core front end are on same " zero " plane.At last dilator and inner core are together extracted out, stayed epitheca in passage, whole operation is finished.

Advantage of the present invention is that the front end shape of dilator becomes cylindrical shape by taper shape, can be before dilator and inner core be extracted, easily and accurately guide epitheca to push ahead accurate location, alleviate patient's misery, minimizing is to the damage of nephridial tissue on every side, reduce hemorrhagely, improve the success rate of clinical percutaneous renal puncture, obtain beyond thought effect through on probation.

Description of drawings

Fig. 1 is the structural representation of a kind of front end shape variable percutaneous renal puncture convergent divergent channel of the present invention.

Fig. 2 is that the inner core of a kind of front end shape variable percutaneous renal puncture convergent divergent channel of the present invention is with the complete softened state schematic diagram of dilator front end.

Fig. 3 is that the epitheca of a kind of front end shape variable percutaneous renal puncture convergent divergent channel of the present invention is pushed ahead 2cm, epitheca front end, dilator front end and the inner core front end schematic diagram when same " zero " flat state.

Fig. 4 be a kind of front end shape variable percutaneous renal puncture convergent divergent channel of the present invention dilator be the cone-shaped nose main body enlarged diagram that the arch face triangle of circular arc consists of by three isosceles, base.

Fig. 5 be a kind of front end shape variable of the present invention the percutaneous renal puncture convergent divergent channel static map.

The explanation of labelling in the accompanying drawing:

1---dilator, 2---the dilator front end, 3---the dilator external screw thread, 4---dilator handle, 5---inner core, 6---the inner core nut, 7---female thread, 8---epitheca, 9---the epitheca handle, 10---scale mark.

The specific embodiment

The invention will be further described below in conjunction with accompanying drawing:

When static, dilator (1) is enclosed within on the inner core (5), and epitheca (8) is enclosed within on the dilator (1), all belongs to movingly; Female thread (7) in the nut (6) on the inner core (5) is in contact condition with dilator (1) external screw thread (3), the front end of inner core (5) has the 2cm distance apart from dilator (1) front end (2), the handle (4) of dilator (1) is in coincidence status with the handle (9) of epitheca (8), and the scale mark (10) on the dilator (1) is blocked by epitheca (8).

During use, because dilator (1) is movingly with inner core (5) and epitheca (8), so when inner core nut (6) rotates, female thread (7) is pushed ahead with the effect promotion inner core (5) of dilator external screw thread (3) twist power, dilator front end (2) is strutted gradually, know until inner core nut (6) contacts with dilator handle (4), at this moment, inner core (5) advances forward 2cm in dilator (1), inner core (5) front end and dilator front end (2) are in same " zero " plane; Use epitheca (9) to push ahead until expose till the 2cm scale mark (10) on the dilator (1), at this moment, epitheca (8) front end and dilator front end (2) and inner core (5) front end three are in same " zero " plane again; At last, dilator (1) and inner core (5) are extracted, kept somewhere epitheca (8) in puncture channel, as the passage for the treatment of.

Should be noted that at last; above content is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; the simple modification that those of ordinary skill in the art carries out technical scheme of the present invention or be equal to replacement does not all break away from essence and the scope of technical solution of the present invention.

Claims (6)

1. the percutaneous renal puncture convergent divergent channel of a front end shape variable, it is characterized in that: the puncture convergent divergent channel is enclosed within on the cylindric dilator (1) by cylindric epitheca (8), and cylindric dilator (1) is enclosed within on the hollow cylinder inner core (5) and consists of movingly.

2. a kind of front end shape variable percutaneous renal puncture convergent divergent channel according to claim 1 is characterized in that: the front end (2) of puncture convergent divergent channel is the taper shape that the taper shape that is processed into of folding or the cutting arch face triangle that to be processed into three to six isosceles, bases be circular arc consists of.

3. a kind of front end shape variable percutaneous renal puncture convergent divergent channel according to claim 1, it is characterized in that: the interior diameter of puncture dilator (1) and the overall diameter of inner core (5) movingly and equal in length, the interior diameter of the overall diameter of dilator (1) and epitheca (8) is movingly.

4. a kind of front end shape variable percutaneous renal puncture convergent divergent channel according to claim 1, it is characterized in that: dilator handle (4) to dilator (1) end is processed with 2cm external screw thread (3), the front end of dilator (2) has been located fixedly scale mark (10), and the length of dilator front end (2) is 2cm.

5. a kind of front end shape variable percutaneous renal puncture convergent divergent channel according to claim 1, it is characterized in that: inner core (5) end is fixed with inner core nut (6), and 2cm female thread (7) and the isometric twist of dilator external screw thread (3) are arranged in the inner core nut (6).

6. a kind of front end shape variable percutaneous renal puncture convergent divergent channel according to claim 1, it is characterized in that: the Length Ratio dilator handle (4) of epitheca (8) is to the short 2cm of length of dilator front end (2), and epitheca handle (9) coincides together with dilator handle (4) when static.

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