Patent Description:
In a surgery, such as an implantable surgery, during the patient's operation, firstly, the doctor needs to determine a target position of the patient's brain by a three-dimensional stereotactic device. According to the target position, the doctor opens a small hole on the patient's skull, and inserts a brain electrode cable into the target of the brain through the cranial hole. The doctor tests the implanted target with a test stimulator. If the stimulation treatment effect is ideal, the brain electrode cable is reliably fixed on the skull with a fixing device.

In the existing art, for example, in the US patent No. <CIT>, the fixing device for fixing the brain electrode cable usually includes a cranial ring and a cranial cover, after the brain electrode cable is inserted into the cranial ring, the cranial cover covers the cranial ring and closes the cranial ring. The brain electrode cable is clamped between the cranial cover and the cranial ring, and the brain electrode cable is fixed on the skull by the friction between the brain electrode cable and the cranial ring as well as the cranial cover.

However, during the operation, when the trocar is inserted and after the trocar is removed, since the brain electrode cable is not fixed, after taking out the guide wire in the cable, the doctor presses the cable on the cranial ring with the cranial cover directly. In this case, the cable is easily to be deviated and changed in a depth position, which makes the insertion position of the electrode deviate from the target and makes the operation complicated, resulting in unsatisfactory treatment effect. Moreover, since a layer of the cranial cover is added to the scalp of the patient, the height of the whole fixing device is too high, which is easy to cause discomfort and unsightly appearance of the patient.

Therefore, it is urgent to develop an auxiliary tool for surgical assistance to achieve the auxiliary fixing, especially the brain electrode fixing. The tool includes a cranial plug, which enables the electrode cable to be reliably fixed on the cranial ring in a horizontal plane, is convenient for accurately and reliably inserting the cranial plug into the hole of the cranial ring, facilitates the doctor use under different conditions, and improves the convenience of the doctor's operation.

Further relevant technologies are discussed in the patent application publications: <CIT>, <CIT>, <CIT>, and <CIT>.

The purpose of the present disclosure is to provide an auxiliary tool for surgery as defined in the attached independent claim, which assists the doctor in reliably fixing a cranial plug in a cranial ring during the operation process, so as to achieve the convenient insertion and the effective compression. Further improvements are provided in the dependent claims.

To achieve the purpose of the present disclosure, the present invention provides an auxiliary tool for surgery as defined in claim <NUM>.

As a further improvement of the present disclosure, the first mounting part includes a first boss and at least one first protruding point disposed on the first boss.

As a further improvement of the present disclosure, the second mounting part includes a second boss and a third boss structure disposed on the second boss, or the second mounting part includes a second boss and at least one second protruding point.

As a further improvement of the present disclosure, the surgical device has at least one hole matched with the at least one first protruding point of the mounting part.

As a further improvement of the present disclosure, a deformation space is provided between the first leg pair.

As a further improvement of the present disclosure, a length of the first leg pair is larger than a length of the second leg pair.

As a further improvement of the present disclosure, the first leg pair or the second leg pair further includes a friction structure.

As a further improvement of the present disclosure, the friction structure is a structure having multiple convex ribs or multiple point-shaped protruding structures.

As a further improvement of the present disclosure, the manufacturing material of the auxiliary tool for surgery with the above structure is engineering plastic or elastic metal material.

The auxiliary tool for surgery in the present disclosure assists the doctor in reliably fixing the cranial plug in the cranial ring during the operation process, which achieves the effective placement, fixation and compression, so that the electrode cable is firmly and accurately positioned at a designated target position, and the phenomenon of target deviation in the operation process of sealing the cranial ring is avoided, the operation process is reduced, and the whole surgery is convenient for operation.

The present disclosure will be described below in detail with reference to the specific embodiments illustrated in the accompanying drawings. However, these embodiments are not intended to limit the present disclosure. Any changes in structures, methods or functions made by those skilled in the art based on these embodiments are within the scope of the present disclosure.

Referring to <FIG>, an auxiliary tool for surgery <NUM> includes an auxiliary tool main body part <NUM>, and a first leg pair <NUM> located on the auxiliary tool main body part. A tail end of the first leg pair <NUM> is connected to the auxiliary tool main body part <NUM>, a first mounting part <NUM> is formed at a front end of the first leg pair <NUM>, and the first mounting part <NUM> cooperates with an upper surface of a cranial foramen plug <NUM> for inserting the cranial foramen plug <NUM> into a hole of a cranial ring (not shown in the figure).

The first mounting part <NUM> includes a first boss <NUM> and at least one protruding point <NUM> disposed on the first boss <NUM>. The boss <NUM> is cylindrical, and the diameter of the boss <NUM> is approximately same as the diameter of the cranial foramen plug <NUM>. In this embodiment, four protruding points <NUM> are uniformly distributed on a circular bottom surface of the boss <NUM>, and are configured to match with four grooves on an upper surface of the cranial foramen plug <NUM> so as to facilitate the doctor accessing to the cranial foramen plug <NUM>. Apparently, in other embodiments, the cranial foramen plug <NUM> may be matched in other ways, such as changing the shape and the number of protruding points <NUM>, as in the embodiment shown in <FIG>, the number of protruding points <NUM> is two.

As shown in <FIG>, a plane where the first boss <NUM> of the first mounting part <NUM> has an inclination angle θ with respect to an extension plane where the auxiliary tool main body part <NUM> is located, and a range of the inclination angle θ may be set to be <NUM>°≤θ≤<NUM>°. The inclination angle θ is set to facilitate applying a force to the first mounting part <NUM> when holding the auxiliary tool main body part <NUM>. Preferably, the range of the inclination angle θ may be set to <NUM>°≤θ≤<NUM>°, and a more preferable range of the inclination angle θ is <NUM>° ≤ θ ≤ <NUM>°, <NUM>° ≤ θ ≤ <NUM>°. The inclination angle θ in the embodiment as shown in the figure is <NUM>°. According to different force-applying habits of users, the inclination angle θ may also preferably be <NUM>° ≤ θ ≤ <NUM>°, <NUM>° ≤ θ ≤ <NUM>° or the like.

The auxiliary tool <NUM> also includes a second leg pair <NUM> located on the auxiliary tool main body part <NUM>, a tail end of the second leg pair <NUM> is connected to the auxiliary tool main body part <NUM>, and a front end of the second leg pair <NUM> extends outward so as to form a second mounting part <NUM>. The second mounting part <NUM> includes a second boss <NUM>, and a third boss <NUM> disposed on the second boss <NUM>. The diameter of the third boss <NUM> is slightly smaller than the diameter of the cranial foramen plug <NUM>. The length of the first leg pair <NUM> is larger than the length of the second leg pair <NUM> of the auxiliary tool for surgery.

As described above, a plane where the second boss <NUM> of the second mounting part <NUM> is located and an extension plane where the auxiliary tool main body part <NUM> is located also have an inclination angle, and the inclination angle may be set with reference to the inclination angle θ between the plane where the first boss <NUM> is located and the extension plane where the auxiliary tool main body part <NUM> is located, which will not be described here.

The first leg pair and/or the second leg pair further include a friction structure <NUM>. The friction structure <NUM> is a structure having multiple convex ribs or multiple point-shaped protruding structures.

The manufacturing material of the auxiliary tool for surgery in the present disclosure is engineering plastic or elastic metal material.

The use of the auxiliary tool for surgery during the operation process of the doctor will be described below in detail, especially the process of installing a cranial foramen electrode lock and an electrode by using the auxiliary tool for surgery.

First, the doctor first inserts the cranial ring into a cranial opening of the patient, and after the cooperation is firm, the doctor inserts the trocar in place. In this case, the trocar is fixed with a special clamp, and then a nerve stimulation electrode cable is inserted into a pre-calculated depth from an inner hole of the trocar. After the doctor completes the adjustment test, firstly, the doctor pinches two legs of the first leg pair of the auxiliary tool for surgery to insert four (exemplarily shown as four) protruding points <NUM> on the boss <NUM> into four corresponding grooves on the upper surface of the cranial plug <NUM>, so that the cranial plug <NUM> is connected to the first mounting part <NUM>. Since the auxiliary tool for surgery in the present disclosure is made of the engineering plastic or the elastic metal material, the doctor controls the opening of a side groove on the cranial plug <NUM> through the pinching force applied to the two leg of the first leg pair by the hand, and then clamps the trocar containing the electrode cable in an aligned position inside the cranial plug <NUM> and the auxiliary tool for surgery <NUM>, and clamps the auxiliary tool for surgery by the hand and presses the auxiliary tool for surgery down forcefully so that the cranial plug <NUM> and the cranial ring are cooperated in place, and the cranial ring is closed by the cranial plug <NUM>. The doctor may then further clamp one end of the auxiliary tool for surgery with the third boss <NUM> by the hand and press down the one end with the third boss <NUM> forcefully so that the cranial plug <NUM> fully cooperates with the cranial ring.

Next, the doctor continues to clamp one end of the auxiliary tool for surgery with the third boss <NUM> by the hand and press down the one end with the third boss <NUM> forcefully so that the cranial plug <NUM> and the cranial ring <NUM> keeps cooperating with each other in place, and then takes out the trocar in an axial direction of the trocar, avoiding the plane deviation or the axial deviation caused by the friction between the trocar and the cranial foramen plug <NUM>. When the trocar is removed from the cranial foramen plug <NUM>, the brain electrode lead cable can effectively maintain at this position since the brain electrode lead cable is tightly fixed by the cranial foramen plug <NUM> having elasticity.

Compared with the existing art, the doctor can quickly and conveniently insert and reliably fix the cranial foramen plug in the cranial ring by using this dedicate fixation auxiliary device in a relatively limited space. In addition, after the trocar is taken away and the guide wire in the cable is taken out, a stimulation cable is also clamped tightly by the cranial plug to prevent the cable from being displaced in horizontal and vertical directions, which is convenient for operation.

Claim 1:
An auxiliary tool for surgery (<NUM>), comprising: an auxiliary tool main body part (<NUM>), a first leg pair (<NUM>), and a second leg pair (<NUM>), wherein the first leg pair (<NUM>) and the second leg pair (<NUM>) are located on the auxiliary tool main body part (<NUM>),
wherein a tail end of the first leg pair (<NUM>) is connected to one end of the auxiliary tool main body part (<NUM>), a first mounting part (<NUM>) is formed at a front end of the first leg pair (<NUM>), and the first mounting part (<NUM>) is configured to clamp and press a surgical device to place the surgical device in a predetermined position; and
a tail end of the second leg pair (<NUM>) is connected to another end of the auxiliary tool main body part (<NUM>) which is opposite to the one end of the auxiliary tool main body part (<NUM>), characterised in that a front end of the second leg pair (<NUM>) extends outward so as to form a second mounting part (<NUM>).