CN213129727U

CN213129727U - Soft drill for removing long-dry bone intramedullary focus

Info

Publication number: CN213129727U
Application number: CN202021135997.9U
Authority: CN
Inventors: 沈作佳
Original assignee: Jiangshan People's Hospital
Current assignee: Jiangshan People's Hospital
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-05-07
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a soft drill for removing focus in long-stem bone marrow. The existing medical cleaning soft drill is difficult to scrape the focus in the enlarged marrow cavity at the end part of the long dry bone. The utility model comprises a soft drill main body, an expansion scraping component and an expansion degree adjusting component; the soft drill main body comprises a drill handle, a connecting part and a flexible shaft which are sequentially and fixedly connected; the expansion scraping assembly is arranged at the end part of the flexible shaft far away from the drill shank; the expansion scraping assembly comprises two fixed rings and a plurality of focus scraping strips; one end of each focus scraping strip is fixed with one fixing ring, and the other end of each focus scraping strip is fixed with the other fixing ring; the two fixed rings are sleeved on the flexible shaft; one of the fixed rings is fixed with the end part of the flexible shaft; the other fixed ring is driven by the expansion degree adjusting component to slide. The utility model discloses can make each focus scrape the strip and crooked the opening after stretching into long dry bone marrow to the realization is clear away the focus in the inside expansion part of long dry bone year inner chamber tip.

Description

Soft drill for removing long-dry bone intramedullary focus

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to soft brill is clear away to focus in long dry bone marrow.

Background

The long dry bone mainly comprises femur, tibiofibula, ulna, and humerus, and when the long dry bone has intramedullary infectious lesion or tumor space occupying lesion, medical staff is required to perform an operation to remove the focus in the long dry bone marrow. Because the long dry bone has the irregular characteristics of narrow middle section marrow cavity, expanded end part marrow cavities at two ends and the like, the existing medical soft cleaning drill is difficult to scrape the focus in the expanded end part marrow cavity of the long dry bone (the narrow middle section marrow cavity limits the diameter of the medical soft cleaning drill), thereby further prolonging the operation time and leading the scraping to be incomplete, and seriously influencing the prognosis condition of a patient.

Disclosure of Invention

The utility model aims to provide a soft drill is clear away to focus in long dry bone marrow.

The utility model comprises a soft drill main body, an expansion scraping component and an expansion degree adjusting component; the soft drill main body comprises a drill handle, a connecting part and a flexible shaft which are sequentially and fixedly connected; the expansion scraping assembly is arranged at the end part of the flexible shaft far away from the drill shank; the expansion scraping assembly comprises two fixed rings and a plurality of focus scraping strips; one end of each focus scraping strip is fixed with one fixing ring, and the other end of each focus scraping strip is fixed with the other fixing ring; the two fixed rings are sleeved on the flexible shaft; one of the fixed rings is fixed with the end part of the flexible shaft; the other fixed ring is driven by the expansion degree adjusting component to slide.

Preferably, the expansion degree adjusting assembly comprises a locking cylinder, a connecting soft cylinder and an elastic sleeve which are sequentially connected, coaxially sleeved on the flexible shaft; the side surface of the locking barrel is provided with a threaded hole. A set screw is screwed in the threaded hole; the elastic sleeve props against the corresponding fixed ring.

Preferably, each focus scraping strip is spirally arranged on the flexible shaft.

Preferably, the soft drill body further comprises a cutting head. The cutting head and the end of the flexible shaft far away from the drill handle.

Preferably, the focus scraping strip is in a slender sheet shape.

Preferably, the flexible shaft is arranged in a hollow mode, and a spiral groove is formed in the outer side face of the flexible shaft.

Preferably, the length of the flexible shaft is larger than that of the cleaned long dry bone.

Preferably, the side part of the drill shank is provided with a plurality of limiting stepped surfaces.

The utility model has the advantages that:

1. the utility model discloses can make each focus scrape the strip and crooked the opening after stretching into long dry bone marrow to the realization is clear away the focus in the inside expansion part of long dry bone year inner chamber tip.

2. The utility model discloses a slip and rotate outside a lock section of thick bamboo, can adjust the crooked degree of each focus scraping strip in the long bone to can use different sizes, different severity patient's long bone.

3. The utility model discloses in use spiral helicine focus to scrape the strip for the length direction and the rotation direction of focus scraping strip are the acute angle, can reduce the focus and scrape the injury of strip to long dry bone marrow inner chamber.

Drawings

Fig. 1 is a schematic structural view of a focus scraping strip of the present invention in embodiment 1 without bending and stretching;

fig. 2 is a schematic structural view of a focus scraping strip of the present invention after bending and stretching;

fig. 3 is a cross-sectional view of embodiment 1 of the present invention;

fig. 4 is a schematic view of the using process of embodiment 1 of the present invention.

Fig. 5 is a schematic structural view of a focus scraping strip of the present invention after being bent and opened according to embodiment 3;

fig. 6 is an end view of an expansion scraping assembly according to embodiment 3 of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1

As shown in fig. 1, 2 and 3, a long-stem intramedullary lesion removing soft drill comprises a soft drill body 1, an expansion scraping component 3 and an expansion degree adjusting component 2. The soft drill body 1 comprises a drill handle 1-1, a connecting part 1-2, a flexible shaft 1-3 and a cutting head 1-4 which are sequentially arranged, fixedly connected. The cutting head 1-4 is in the shape of a drill bit and is mainly used for cutting lesions in the middle medullary cavity. The side part of the drill handle 1-1 is provided with a plurality of limiting step surfaces which are used for being connected with a drill bit mounting port or a hand crank of the medical electric drill. The flexible shaft 1-3 is arranged in a hollow way, and the outer side surface is provided with a spiral groove which can be bent and deformed along the shape in the long stem bone marrow, thereby enhancing the capability of the utility model extending into the long stem bone marrow and avoiding the cutting head 1-4 from causing serious damage to the inner wall of the long stem bone.

The expansion degree adjusting component 2 comprises a locking barrel 2-1, a connecting soft barrel 2-2 and an elastic sleeve 2-3 which are sequentially arranged and connected, coaxially sleeved on the flexible shaft 1-3. The elastic sleeve props against the corresponding fixed ring. The connecting soft cylinder 2-2 and the elastic sleeve 2-3 are made of elastic materials, particularly rubber, so that normal tissues in long-stem bone marrow of a patient are prevented from being damaged in sliding. The side surface of the locking barrel 2-1 is provided with a threaded hole. A set screw is screwed into the threaded hole for locking the position of the expansion degree adjustment assembly 2. During use, the capture cylinder 2-1 is continuously maintained outside of the long shaft bone, facilitating adjustment of the expansion scraping assembly 3.

An expansion scraping assembly 3 is arranged between the cutting head 1-4 and the expansion adjustment assembly 2. The expansion scraping component 3 comprises two fixed rings and eight focus scraping strips 3-1. The focus scraping strip 3-1 is in a slender sheet shape and is made of stainless steel. One end of each of the eight focus scraping strips 3-1 is respectively fixed with eight uniform positions on one of the fixing rings, and the other end of each of the eight focus scraping strips is respectively fixed with eight uniform positions on the other fixing ring. The two fixed rings are sleeved on the flexible shafts 1-3. The two fixing rings are fixed with two ends of the cutting heads 1-4 respectively.

In the initial state, the eight focus scraping strips 3-1 are straight strips, are attached to the flexible shaft 1-3 and are convenient to extend into long dry bone marrow. When a doctor slides the locking cylinder 2-1 towards the cutting head, the elastic sleeve 2-3 is driven to spirally move towards the cutting head 1-4, so that the distance between the elastic sleeve 2-3 and the cutting head 1-4 is reduced, and then the two fixing rings are extruded. When the two fixing rings are close to each other, each focus scraping strip 3-1 is bent and deformed to form a lantern-shaped focus scraping net;

when the soft drill body 1 extends into the long stem bone marrow, the focus scraping strips 3-1 can be extruded to the inner side wall of the long stem bone marrow by bending the focus scraping strips 3-1 outwards; then, the soft drill body 1 is rotated, and the focus scraping strips 3-1 can scrape the focus in the long bone marrow.

The working principle of the utility model is as follows:

when the cleaned long dry bone 4 is kept for treatment, the end part is provided with a hole, and a reinforcing steel bar is arranged in the marrow; when the intramedullary focus is to be removed, the intramedullary steel bars are taken out. The locking barrel is screwed to a position far away from the cutting head, so that each focus scraping strip 3-1 in the expansion scraping component 3 keeps an undeployed straight strip shape and can pass through a narrow middle medullary cavity of the long stem bone 4. Thereafter, the cutting head is inserted into the medullary cavity of the cleaned long dry bone 4;

as shown in fig. 4, a medical electric drill or a hand crank is connected with a drill handle to drive the soft drill main body to rotate, so that the cutting heads 1-4 continue to extend into the medullary cavity of the long dry bone 4; after the expansion scraping component 3 passes through the narrow middle medullary cavity of the long dry bone 4, the medical staff loosens the set screw, slides the locking barrel in the forward direction and screws the set screw again. The elastic sleeve 2-3 is extruded and expanded to the scraping component 3, and each focus scraping strip 3-1 is bent outwards and expanded to be in contact with the side wall of the medullary cavity; the soft drill main body is continuously rotated, and the focus scraping strips 3-1 rotate along with the rotation to scrape the focus in the expanded inner end of the long bone marrow cavity.

After cleaning, the set screw is loosened, and the locking barrel slides forwards to ensure that the focus scraping strips 3-1 reset under the self elasticity, so that medical personnel can take out the soft drill main body conveniently.

Example 2

The present embodiment is different from example 1 in that:

the locking cylinder 2-1 and the flexible shaft 1-3 form a sliding pair (specifically, the sliding pair is formed by a convex block on the inner side wall of the locking cylinder 2-1 and a sliding groove arranged on the side surface of the flexible shaft 1-3); in this embodiment, the expansion scraping assembly 3 does not rotate, and the expansion scraping assembly 3 can be driven more stably.

Example 3

As shown in figures 5 and 6, the eight focus scraping strips 3-1 are all spirally arranged on the flexible shaft 1-3, when the focus is scraped, the length direction and the rotation direction of the focus scraping strips 3-1 form an acute angle instead of a right angle in the embodiment 1, and the damage of the focus scraping strips 3-1 to the long dry bone marrow inner cavity can be reduced.

Claims

1. A soft drill for removing long-stem intramedullary focus comprises a soft drill main body (1); the method is characterized in that: the device also comprises an expansion scraping component (3) and an expansion degree adjusting component (2); the soft drill main body (1) comprises a drill handle (1-1), a connecting part (1-2) and a flexible shaft (1-3) which are sequentially arranged and fixedly connected; the expansion scraping component (3) is arranged at the end part of the flexible shaft (1-3) far away from the drill handle (1-1); the expansion scraping component (3) comprises two fixed rings and a plurality of focus scraping strips (3-1); one end of each focus scraping strip (3-1) is fixed with one of the fixed rings, and the other end is fixed with the other fixed ring; the two fixed rings are sleeved on the flexible shafts (1-3); one of the fixed rings is fixed with the end part of the flexible shaft (1-3); the other fixed ring is driven by the expansion degree adjusting component (2) to slide.

2. The long-stem intramedullary lesion removal burr of claim 1, wherein: the expansion degree adjusting assembly (2) comprises a locking cylinder (2-1), a connecting soft cylinder (2-2) and an elastic sleeve (2-3) which are sequentially arranged and connected, are coaxial and are sleeved on the soft shaft (1-3); a threaded hole is formed in the side surface of the locking barrel (2-1), and a set screw is screwed in the threaded hole; the elastic sleeves (2-3) are propped against the corresponding fixed rings.

3. The long-stem intramedullary lesion removal burr of claim 1, wherein: each focus scraping strip (3-1) is spirally arranged on the flexible shaft (1-3).

4. The long-stem intramedullary lesion removal burr of claim 1, wherein: the soft drill body (1) also comprises a cutting head (1-4); the cutting head (1-4) and the end of the flexible shaft (1-3) far away from the drill handle (1-1).

5. The long-stem intramedullary lesion removal burr of claim 1, wherein: the focus scraping strip (3-1) is in a slender sheet shape.

6. The long-stem intramedullary lesion removal burr of claim 1, wherein: the flexible shaft (1-3) is arranged in a hollow way, and the outer side surface is provided with a spiral groove.

7. The long-stem intramedullary lesion removal burr of claim 1, wherein: the length of the flexible shaft (1-3) is larger than that of the cleaned long dry bone.

8. The long-stem intramedullary lesion removal burr of claim 1, wherein: the side part of the drill shank (1-1) is provided with a plurality of limiting step surfaces.