CN112190818A

CN112190818A - Can avoid heterotypic PICC pipe of pipe to put into frame

Info

Publication number: CN112190818A
Application number: CN202011082035.6A
Authority: CN
Inventors: 于涛
Original assignee: Individual
Current assignee: Shaanxi Musenze Medical Equipment Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-01-08
Anticipated expiration: 2040-10-12
Also published as: CN112190818B

Abstract

The invention provides a PICC catheter placement frame capable of avoiding catheter dislocation, which relates to the technical field of medical instruments and aims to solve the problems that in the placement process of a PICC catheter, as the PICC catheter is further coated with a layer of shell, the PICC catheter needs to be peeled off in advance, and after peeling off, the risk is increased for the infection of the PICC catheter; the arm sleeve is formed by buckling an upper part and a lower part in a symmetrical structure; and the left end of the upper end of the arm sleeve is vertically upwards fixedly provided with a fixing frame which is symmetrical left and right. In the invention, because the edge of the outer end of the shielding plate is bent downwards, the lower end of the attaching plate is flush with the inner wall of the arm sleeve, and the attaching degree of the pipe inlet can be ensured.

Description

Can avoid heterotypic PICC pipe of pipe to put into frame

Technical Field

The invention relates to the technical field of medical instruments, in particular to a PICC catheter implantation frame capable of avoiding catheter dislocation.

Background

Peripherally inserted central venous catheter (PICC) is a deep venous catheter technique which is introduced from peripheral veins and the tail end of the PICC is positioned in a central vein, is suitable for middle-long-term venous transfusion, tumor chemotherapy, parenteral nutrition and transfusion of elderly patients, and provides middle-long-term venous transfusion treatment for the patients, so that the PICC catheter is kept in the bodies of the patients for a long time, and usually needs 7 days to 1 year. Is an intravenous infusion tool which is necessary to be used when patients clinically use chemotherapy drugs and irritant drugs.

The PICC catheter is mostly placed from the upper limb vein of a patient, the tip of the PICC catheter is positioned in the superior vena cava of the patient after the placement, the prior catheter placement frame is mostly a PICC catheter placement frame capable of avoiding catheter dislocation as in patent application CN201820395052.7, and comprises an arm supporting plate and a wrist supporting frame, wherein the arm supporting plate is connected with an implantation bed through a connecting device, the implantation bed is a sickbed for the patient to lie, the wrist supporting frame is arranged on the outer side of the arm supporting plate, an angle scale line is arranged on the top surface of the arm supporting plate, and a rotary hole and a positioning hole for connecting the wrist supporting frame are arranged on the outer side of the arm supporting plate, in the PICC catheter placement process, the included angle between the arm and the trunk of the patient is kept within the range of 95-105 degrees, in the angle range, the included angle between the subclavian vein and the superior vena cava of the patient is an obtuse angle, so that the, and the angle is the acute angle between internal jugular vein and the subclavian vein this moment, can effectually avoid the PICC pipe to get into the internal jugular vein to avoid the pipe dystopy.

The PICC pipe is putting into the in-process, because PICC pipe outside still the pot head has the one deck casing, need peel off in advance, and also increased the risk for the infection of PICC pipe after peeling off, in addition, the PICC pipe is getting into internal back, deep overlength or take place the dystopy and will all bring huge misery for the patient, deep overlength is because the PICC pipe is difficult to the accurate measurement length, and the laminating of income body department and patient's arm is inseparable also will lead to the dystopy problem to appear.

Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a PICC catheter insertion frame capable of avoiding catheter dislocation is provided, so as to achieve the purpose of higher practical value.

Disclosure of Invention

In order to solve the technical problems, the invention provides a PICC catheter implanting frame capable of avoiding catheter dislocation, which aims to solve the problems that in the process of implanting the PICC catheter, because a shell is further coated outside the PICC catheter, the PICC catheter needs to be peeled off in advance, and the risk is increased for the infection of the PICC catheter after peeling off, in addition, after the PICC catheter enters the body, the great pain is brought to a patient due to deep overlong or dislocation, and the problem of dislocation is caused due to the fact that the PICC catheter is difficult to measure the length accurately and the implanted part is not tightly attached to the arm of the patient.

The invention can avoid the purpose and the effect of a PICC catheter implantation frame with catheter dislocation, and is achieved by the following specific technical means:

a PICC catheter implantation frame capable of avoiding catheter dislocation comprises an arm sleeve; the arm sleeve is formed by buckling an upper part and a lower part in a symmetrical structure; the left end of the upper end of the arm sleeve is vertically and upwards fixedly provided with a left and right symmetrical fixing frame; rectangular suspensions are respectively and fixedly arranged on the left side wall and the right side wall of the fixing frame in a vertical mode; a pipe feeding mechanism is vertically and fixedly installed at the inner end of the suspension, a non-return mechanism is fixedly installed at the joint of the lower end of the pipe feeding mechanism and the suspension, and a driven mechanism is vertically and rotatably installed on the suspension outside the pipe feeding mechanism; two pressing mechanisms which are symmetrical up and down are vertically arranged on the driven mechanism, and the outer ends of the pressing mechanisms are inserted into the side wall of the outer end of the suspension in a sliding manner; the middle part of the fixing frame horizontally passes through the guide pipe.

Furthermore, the arm sleeve comprises air holes, the arm sleeve is of a structure like a Chinese character 'ji', the arm sleeve is sleeved on the arm of a patient, and the arc wall of the side wall of the front end of the arm sleeve is transversely provided with strip-shaped air holes with uniform intervals.

Further, the mount includes shield, skinning knife and attaching plate, the middle part of mount left end lateral wall and right-hand member lateral wall leans on the punishment of going up do not perpendicular fixed mounting have the shield, the outer end edge department kickdown of shield, the perpendicular peeling knife of point cone of forward fixed mounting of front end lateral wall lower extreme department of mount, the through-hole that can supply the pipe inner tube to slide to pass is vertically seted up at the middle part of skinning knife, with the attaching plate of skinning knife corresponding position department fixed mounting nose form on the lateral wall of mount rear end, the lower extreme of its attaching plate is level mutually with the inner wall of arm cover.

Furthermore, the suspension comprises a stroke hole, outward strip-shaped stroke holes are transversely formed in the positions, corresponding to the driven mechanism, of the top plate and the bottom plate of the suspension, and the driven mechanism is vertically installed between the upper stroke hole and the lower stroke hole.

Furthermore, advance the pipe mechanism and include buncher, advance tub wheel and ring lining, advance the partial fixed mounting that the upper end of pipe mechanism is located on the suspension roof and have vertical buncher, the lower extreme of its buncher rotates through the shaft coupling and connects the pivot of vertical arranging in between the suspension, the middle part fixed mounting of its pivot has advances the tub wheel, its thickness that advances the tub wheel is unanimous with the internal diameter of pipe, advance on the top plane of tub wheel and the bottom plane line position punishment that is close to the outer ring limit do not fixed mounting have the ring lining of slope.

Furthermore, the driven mechanism comprises a driven wheel and a dial, the middle of the driven mechanism is fixedly provided with the driven wheel, the driven wheel corresponds to the pipe feeding wheel in position, a vertical anti-skidding groove is formed in the outer wall of the driven wheel, the dial is arranged on the top plane of the driven wheel along the annular edge, and the dial and the pipe feeding wheel extrude and penetrate through a half of protective sleeves of the guide pipe.

Furthermore, hold-down mechanism is including compressing tightly post, pressure spring, meter circle ware and scale needle, hold-down mechanism's outer end lateral wall middle part vertical fixation installs and compresses tightly the post, and the outer end that compresses tightly the post then slidable mounting on the outer end lateral wall of suspension, compresses tightly the cover on the post and is equipped with pressure spring, and is special, fixed mounting has the meter circle ware on the hold-down mechanism's of upper end front end lateral wall, and the lower extreme of its meter circle ware is tangent with the top plane from the driving wheel, then vertical fixation installs the scale needle on hold-down mechanism's the inner lateral wall.

Furthermore, non return mechanism is including rotating driver plate, non return tooth and ratchet tooth, non return mechanism's middle part is provided with the rotation driver plate, and its rotation driver plate is connected with the pivot lower extreme stationary phase that advances the pipe mechanism, rotates the non return tooth that installs crescent through the round pin axle rotation on the driver plate, and non return mechanism's main part is then fixed in on the suspension bottom plate top plane, and sets up the ratchet tooth of arranging clockwise that suits with non return tooth on non return mechanism's the middle part rampart.

Compared with the prior art, the invention has the following beneficial effects:

because the outer end edge department of shield is downbent, can shield the adjustment structure of below, avoid taking place the touching problem in the use, the vertical fixed mounting forward of front end lateral wall lower extreme department of mount has the skinning knife of point taper shape, the through-hole that can supply the pipe inner tube to slide to pass is vertically seted up at skinning knife's middle part, can carry out the casing again at the in-process that the pipe got into and get rid of, the chance of infection has been reduced, and still advance the pipe through the casing guide pipe of being peeled off, the laminating board of nose form is fixedly mounted with skinning knife corresponding position department on the lateral wall of mount rear end, the lower extreme of its laminating board is leveled mutually with the inner wall of arm cover, can guarantee the laminating degree of advancing pipe department.

Because the lower extreme of buncher rotates the pivot of connecting vertically arranging in between the suspension through the shaft coupling, the middle part fixed mounting of its pivot has into tub wheel, its thickness that advances tub wheel is unanimous with the internal diameter of pipe, advance on the top plane of tub wheel and the bottom plane position punishment that goes near outer annular edge do not fixed mounting have the ring lining of slope, rotation through buncher, make into tub wheel rotatory, thereby mutually support with follower, make the casing of pipe stimulate backward under the extruded state, force the pipe advance the pipe under advancing tub wheel's rotation, the winding casing can be restrainted to the ring lining, avoid droing.

Because the middle part of the driven mechanism is fixedly provided with a driven wheel, the driven wheel corresponds to the position of the pipe feeding wheel, the outer wall of the driven wheel is provided with a vertical anti-skid groove, the top plane of the driven wheel is provided with a dial scale along the annular edge, the dial scale and the pipe feeding wheel extrude and penetrate through a half of protective sleeve of the guide pipe, the driven wheel can be matched with the pipe feeding wheel to extrude and advance the shell of the guide pipe, thereby completing the action of pipe feeding, the dial scale and the ring counter are matched with each other, the length of the pipe feeding can be accurately calculated, thereby avoiding the guide pipe from being inserted too deeply or too shallowly, the middle part of the side wall of the outer end of the pressing mechanism is vertically and fixedly provided with a pressing column, the outer end of the pressing column is slidably arranged on the side wall of the outer end of the suspension, the pressing column is sleeved with a pressing spring, particularly, the side wall of the, the vertical fixed mounting is provided with the scale needle on the inner end side wall of the pressing mechanism, and the pressing mechanism can press the driven mechanism in a self-adaptive mode, so that the ring counter can be always in a working state, omission is avoided, and the measuring accuracy is guaranteed.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic view of the left front upper axial view of the present invention.

Fig. 2 is a schematic diagram of an enlarged portion a of fig. 1 according to the present invention.

Fig. 3 is a rear right lower axial view schematic diagram of the present invention.

Fig. 4 is a schematic front view of the present invention.

Fig. 5 is an axial view of the present invention.

Fig. 6 is an axial view of the shield and cuff portion of the present invention.

Fig. 7 is a schematic axial view of the suspension inner pipe feeding mechanism of the invention in a disassembled state.

Fig. 8 is a schematic diagram of the enlarged portion B of fig. 7 according to the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. an arm sleeve; 101. air holes are formed; 2. a fixed mount; 201. a shield plate; 202. a skinning knife; 203. attaching a plate; 3. a suspension; 301. a travel hole; 4. a pipe feeding mechanism; 401. a speed-regulating motor; 402. a pipe feeding wheel; 403. a ring lining; 5. a driven mechanism; 501. a driven wheel; 502. a dial scale; 6. a hold-down mechanism; 601. a compression post; 602. a compression spring; 603. a lap counter; 604. a scale needle; 7. a non-return mechanism; 701. rotating the drive plate; 702. a non-return tooth; 703. ratchet teeth; 8. a conduit.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 8:

the invention provides a PICC catheter implantation frame capable of avoiding catheter dislocation, which comprises an arm sleeve 1; the arm sleeve 1 is formed by buckling an upper part and a lower part in a symmetrical structure; the left end of the upper end of the arm sleeve 1 is vertically and upwards fixedly provided with a fixed frame 2 which is symmetrical left and right; the fixing frame 2 comprises a shielding plate 201, a peeling knife 202 and a jointing plate 203, the shielding plate 201 is vertically and fixedly arranged at the middle upper part of the left end side wall and the right end side wall of the fixing frame 2 respectively, the edge of the outer end of the shielding plate 201 is bent downwards, the lower adjusting structure can be shielded to avoid the touch problem in the using process, the lower end of the side wall of the front end of the fixing frame 2 is vertically and forwardly fixedly provided with the peeling knife 202 in the shape of a taper, the middle part of the peeling knife 202 is longitudinally provided with a through hole for the inner pipe of the catheter 8 to slide through, the shell can be removed in the entering process of the catheter 8, the infection chance is reduced, and can also be guided by the peeled shell to enter the catheter 8, a nose-shaped jointing plate 203 is fixedly arranged on the side wall of the rear end of the fixed frame 2 corresponding to the peeling knife 202, the lower end of the attaching plate 203 is flush with the inner wall of the arm sleeve 1, so that the attaching degree of the pipe inlet part can be ensured; a cuboid-shaped suspension 3 is respectively and vertically and fixedly arranged on the left side wall and the right side wall of the fixed frame 2; a pipe feeding mechanism 4 is vertically and fixedly installed at the inner end of the suspension 3, a non-return mechanism 7 is fixedly installed at the joint of the lower end of the pipe feeding mechanism 4 and the suspension 3, and a driven mechanism 5 is vertically and rotatably installed on the suspension 3 outside the pipe feeding mechanism 4; the pipe feeding mechanism 4 comprises a speed regulating motor 401, a pipe feeding wheel 402 and a ring lining 403, wherein the part of the upper end of the pipe feeding mechanism 4, which is positioned on the top plate of the suspension 3, is fixedly provided with a vertical speed regulating motor 401, the lower end of the speed regulating motor 401 is rotatably connected with a rotating shaft vertically arranged between the suspensions 3 through a coupler, the middle part of the rotating shaft is fixedly provided with the pipe feeding wheel 402, the thickness of the pipe feeding wheel 402 is consistent with the inner diameter of the conduit 8, the positions of the top plane and the bottom plane of the pipe feeding wheel 402, which are close to the outer ring edge, are respectively and fixedly provided with the inclined ring lining 403, the pipe feeding wheel 402 rotates through the rotation of the speed regulating motor 401, so that the pipe feeding wheel 402 is matched with the driven mechanism 5, the shell of the conduit 8 is pulled backwards in a squeezed state, the conduit 8 is forced to be fed under the rotation of the pipe feeding wheel 402, and the ring; two pressing mechanisms 6 which are symmetrical up and down are vertically arranged on the driven mechanism 5, and the outer ends of the pressing mechanisms 6 are inserted into the side wall of the outer end of the suspension 3 in a sliding manner; the middle part of the fixing frame 2 horizontally passes through the conduit 8.

Wherein, arm cover 1 includes bleeder vent 101, and arm cover 1 is "nearly" word column structure, and the ring overlaps on patient's arm, transversely sets up the even strip bleeder vent 101 in interval on the lateral wall cambered surface wall of arm cover 1 front end, can paste to fix on patient's arm, avoids taking place the dystopy problem, and the comfort level can be guaranteed to bleeder vent 101 moreover.

Wherein, suspension 3 includes stroke hole 301, and outside strip stroke hole 301 has all transversely been seted up with the corresponding position department of follower 5 on the roof of suspension 3 and the bottom plate, and follower 5 is then vertical to be installed between two upper and lower stroke holes 301, provides the activity space for hold-down mechanism 6.

Wherein, follower 5 includes from driving wheel 501 and calibrated scale 502, follower 501 is fixed to the middle part of follower 5, it corresponds with advancing tub of wheel 402 position from driving wheel 501, and seted up vertical antiskid groove on the outer wall of driven wheel 501, and the top plane of driven wheel 501 is provided with calibrated scale 502 along the surrounding edge, calibrated scale 502 and advancing tub of wheel 402 extrusion are passed and are had half protective sheath of pipe 8, it can mutually support with advancing tub of wheel 402 to make the casing extrusion of pipe 8 advance from driving wheel 501, thereby accomplish the action of advancing the pipe, and calibrated scale 502 and lap counter 603 mutually support, can the accurate length of calculating advancing the pipe, thereby can avoid pipe 8 to insert too deeply or too shallowly.

Wherein, hold-down mechanism 6 is including compressing tightly post 601, pressure spring 602, count circle ware 603 and scale needle 604, hold-down mechanism 6's outer end lateral wall middle part vertical fixed mounting has compressing tightly post 601, and the outer end that compresses tightly post 601 then slidable mounting on the outer end lateral wall of suspension 3, compress tightly the cover and be equipped with pressure spring 602 on the post 601, it is special, fixed mounting has count circle ware 603 on the hold-down mechanism 6's of upper end front end lateral wall, the lower extreme of its count circle ware 603 is tangent with the top plane from driving wheel 501, then vertical fixed mounting has scale needle 604 on the inner lateral wall of hold-down mechanism 6, accessible hold-down mechanism 6 oppresses driven mechanism 5 self-adaptation, make count circle ware 603 can be in operating condition all the time, avoid omitting, guarantee measuring accuracy.

Wherein, non return mechanism 7 is including rotating the driver plate 701, non return tooth 702 and ratchet tooth 703, non return mechanism 7's middle part is provided with rotates the driver plate 701, it rotates the driver plate 701 and advances the pivot lower extreme stationary phase of pipe mechanism 4 to be connected, rotate the driver plate 701 and go up and install the non return tooth 702 of crescent through the round pin axle rotation, non return mechanism 7's main part is then fixed in on the plane of suspension 3 bottom plate top, and set up the ratchet tooth 703 of arranging clockwise that suits with non return tooth 702 on non return mechanism 7's the middle part rampart, can avoid pipe 8 to advance the pipe in-process and reset, and mutually support with buncher 401, can realize slowly evenly advancing the pipe, reduce patient's misery.

The specific use mode and function of the embodiment are as follows:

in the using process, the arm sleeve 1 is in a structure like a Chinese character 'ji', the arm sleeve is sleeved on the arm of a patient, the arc wall of the side wall of the front end of the arm sleeve 1 is transversely provided with strip-shaped air holes 101 with uniform intervals, the air holes can be attached and fixed on the arm of the patient, the problem of ectopic position is avoided, the air holes 101 can ensure the comfort level, the middle part of the dermatome 202 is longitudinally provided with through holes for the inner tube of the catheter 8 to slide through, the shell can be removed in the entering process of the catheter 8, the infection chance is reduced, the catheter 8 can be guided to enter the tube by the stripped shell, the position corresponding to the dermatome 202 on the side wall of the rear end of the fixed frame 2 is fixedly provided with a nose-shaped attaching plate 203, the lower end of the attaching plate 203 is level with the inner wall of the arm sleeve 1, the attaching degree of the tube can be ensured, the tube entering wheel 402 rotates by the rotation of the speed regulating motor 401, and is, the shell of the conduit 8 is pulled backwards in a squeezed state to force the conduit 8 to enter the pipe under the rotation of the pipe inlet wheel 402, the ring lining 403 can be bound to the wound shell to avoid falling off, the middle part of the driven mechanism 5 is fixedly provided with the driven wheel 501, the driven wheel 501 corresponds to the pipe inlet wheel 402 in position, the outer wall of the driven wheel 501 is provided with a vertical anti-slip groove, the top plane of the driven wheel 501 is provided with a dial 502 along the ring edge, the dial 502 and the pipe inlet wheel 402 are squeezed to penetrate through a half of the protective sleeve of the conduit 8, the driven wheel 501 can be mutually matched with the pipe inlet wheel 402 to squeeze the shell of the conduit 8 to advance, so that the pipe inlet action is completed, the dial 502 is mutually matched with the ring counter 603, the length of the conduit can be accurately calculated, so that the conduit 8 can be prevented from being inserted too deeply or too shallowly, and the driven mechanism 5 can be self-adaptively, make the meter circle ware 603 can be in operating condition all the time, avoid omitting, guarantee the accuracy of measurement, finally, the middle part of non return mechanism 7 is provided with rotates the driver plate 701, it rotates the driver plate 701 and is connected with the pivot lower extreme stationary phase of advancing pipe mechanism 4, rotate the non return tooth 702 that installs the crescent through the round pin axle rotation on the driver plate 701, the main part of non return mechanism 7 then is fixed in on the 3 bottom plate top planes of suspension, and set up the tooth ratchet 703 of arranging clockwise that suits with non return tooth 702 on the middle part rampart of non return mechanism 7, can avoid pipe 8 to advance the pipe in-process and reset, and mutually support with buncher 401, can realize slowly evenly advancing the pipe, reduce patient's misery.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a can avoid heterotypic PICC pipe of pipe to put into frame which characterized in that: comprises an arm sleeve (1); the arm sleeve (1) is formed by buckling an upper part and a lower part in a symmetrical structure; a left end of the upper end of the arm sleeve (1) is vertically and upwards fixedly provided with a left and right symmetrical fixing frame (2); a cuboid-shaped suspension (3) is respectively and fixedly arranged on the left side wall and the right side wall of the fixed frame (2) in a vertical mode; a pipe feeding mechanism (4) is vertically and fixedly installed at the inner end of the suspension (3), a non-return mechanism (7) is fixedly installed at the joint of the lower end of the pipe feeding mechanism (4) and the suspension (3), and a driven mechanism (5) is vertically and rotatably installed on the suspension (3) on the outer side of the pipe feeding mechanism (4); the pipe feeding mechanism (4) comprises a speed regulating motor (401) and a pipe feeding wheel (402), a vertical speed regulating motor (401) is fixedly installed on a part, located on a top plate of the suspension (3), of the upper end of the pipe feeding mechanism (4), the lower end of the speed regulating motor (401) is rotatably connected with a rotating shaft vertically arranged between the suspensions (3) through a coupling, the pipe feeding wheel (402) is fixedly installed in the middle of the rotating shaft, and the thickness of the pipe feeding wheel (402) is consistent with the inner diameter of the guide pipe (8); two pressing mechanisms (6) which are symmetrical up and down are vertically arranged on the driven mechanism (5), and the outer ends of the pressing mechanisms (6) are inserted into the side wall of the outer end of the suspension (3) in a sliding manner; the middle part of the fixing frame (2) horizontally penetrates through the guide pipe (8).

2. The PICC catheter insertion hub capable of avoiding catheter misplacement of claim 1, wherein: the arm sleeve (1) comprises air holes (101), the arm sleeve (1) is of a structure like a Chinese character 'ji', the arm sleeve is sleeved on the arm of a patient, and the side wall arc surface wall of the front end of the arm sleeve (1) is transversely provided with strip-shaped air holes (101) with uniform intervals.

3. The PICC catheter insertion hub capable of avoiding catheter misplacement of claim 1, wherein: mount (2) include shield (201), skinning knife (202) and attaching plate (203), the middle part of mount (2) left end lateral wall and right-hand member lateral wall leans on the punishment to do not perpendicular fixed mounting have shield (201), the outer end edge department kickdown of shield (201), the skinning knife (202) of point cone shape are fixed mounting forward perpendicularly to the front end lateral wall lower extreme department of mount (2), the through-hole that can supply pipe (8) inner tube to slide to pass is vertically seted up at the middle part of skinning knife (202), position department fixed mounting corresponding with skinning knife (202) on mount (2) rear end lateral wall has attaching plate (203) of nose form, the lower extreme of its attaching plate (203) is level with the inner wall of arm cover (1) mutually.

4. The PICC catheter insertion hub capable of avoiding catheter misplacement of claim 1, wherein: the suspension (3) comprises a stroke hole (301), outward strip-shaped stroke holes (301) are transversely formed in positions, corresponding to the driven mechanism (5), on a top plate and a bottom plate of the suspension (3), and the driven mechanism (5) is vertically installed between the upper stroke hole and the lower stroke hole (301).

5. The PICC catheter insertion hub capable of avoiding catheter misplacement of claim 1, wherein: the pipe feeding mechanism (4) further comprises ring liners (403), and inclined ring liners (403) are fixedly mounted at positions, close to the outer ring edges, of the top plane and the bottom plane of the pipe feeding wheel (402) respectively.

6. The PICC catheter insertion hub capable of avoiding catheter misplacement of claim 1, wherein: driven mechanism (5) are including following driving wheel (501) and calibrated scale (502), the middle part fixed mounting of driven mechanism (5) has from driving wheel (501), and it is corresponding with advancing tub wheel (402) position from driving wheel (501), and has seted up vertical antiskid groove on the outer wall from driving wheel (501), and the top plane line of following driving wheel (501) is provided with calibrated scale (502) along the surrounding edge, and calibrated scale (502) and advance tub wheel (402) extrusion are passed and are had half protective sheath of pipe (8).

7. The PICC catheter insertion hub capable of avoiding catheter misplacement of claim 1, wherein: hold-down mechanism (6) are including compressing tightly post (601), pressure spring (602), meter circle ware (603) and scale needle (604), the perpendicular fixed mounting in outer end lateral wall middle part of hold-down mechanism (6) has compressing tightly post (601), and the outer end that compresses tightly post (601) then slidable mounting on the outer end lateral wall of suspension (3), it is equipped with pressure spring (602) to compress tightly the cover on post (601), and is very much, fixed mounting has meter circle ware (603) on the hold-down mechanism (6) of upper end on the front end lateral wall, and the lower extreme of its meter circle ware (603) is tangent with the top plane from driving wheel (501), then perpendicular fixed mounting has scale needle (604) on the inner lateral wall of hold-down mechanism (6).

8. The PICC catheter insertion hub capable of avoiding catheter misplacement of claim 1, wherein: non return mechanism (7) are including rotating driver plate (701), non return tooth (702) and ratchet tooth (703), the middle part of non return mechanism (7) is provided with rotates driver plate (701), and it rotates driver plate (701) and advances the pivot lower extreme stationary phase of pipe mechanism (4) to be connected, rotates driver plate (701) and goes up and rotate non return tooth (702) of installing the crescent through the round pin axle, and the main part of non return mechanism (7) is then fixed in on suspension (3) bottom plate top plane, and sets up ratchet tooth (703) of arranging clockwise that suit with non return tooth (702) on the middle part rampart of non return mechanism (7).