JPS63251Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial use) This invention relates to a brain spatula used during brain surgery.

(Prior art) During brain surgery, one end 2 of the brain blade _A0 is fixed to a fixing device 1, and the other end 3 is
It is used to maintain the retracted membrane of the brain in an incised state, or it is inserted into the cerebral sulcus and used to scrape out the brain in order to expose the affected part of the brain. Usually, both ends are rounded, as shown in Figure 3 A, but the width is rounded.
n ₂ and thickness m ₂ are the same over the entire length, and it is quite stiff, so it requires considerable force to bend. For this reason, as shown in Figure 3 B, some
On one end side A ₁ of the brain blade main body D, where both the thickness m ₁ and the width n ₁ are constant, only the width n ₁ is directed toward the tip C′,
A progressively narrower set of proposals has been proposed.

(Problem to be solved by the invention) However, when the brain vera A ₀ is used to place the brain membrane in an incised state as shown in Fig. 4, the conventional structure does not pose much of a problem. However, if you want to insert the brain spatula into the brain sulcus and plow through the brain to expose the affected part of the brain, you should curve or bend the tip of the brain spatula A ₀ to make it convenient for cutting through the brain. In such cases, the tapered brain vera A
It can be inserted into small gaps and makes it easy to see deep parts of the brain.
Although it is convenient in that the tip is relatively easy to bend, in order to make it suitable for precision surgery in brain surgery, which has made remarkable progress recently, it is necessary to bend the tip of the brain without damaging the affected blood vessels or aneurysms. There are many cases where the brain must be slightly bent to accommodate the surgery, and for this purpose the tip of the brain bellows must be extremely soft. In view of the above facts, the purpose of this invention is to provide a brain veneer suitable for brain surgery.

(Means for Solving the Problems) The brain spatula according to this invention has a brain spatula main body D having a constant thickness m ₁ and a width n ₁ at one end side A ₁ , and a tip C where only the width n ₁ is fixed. In the brain bellow A, which gradually narrows toward the tip C', the thickness _m1 is the same as that of the brain bellow main body D up to the range B halfway toward the tip C', and up to the remaining tip C'. In the range C, the width n and the thickness m gradually become smaller.

(Example) The configuration of an example of the Brain Vera A according to this invention is as follows:
To explain in detail based on FIG. 1, on one end side A ₁ of the brain bellows main body D, where both the thickness m ₁ and the width n ₁ are constant,
In brain bellow A where only the width n ₁ gradually narrows toward the tip C', the thickness m 1 is the width m ₁ of the brain bellow body up to the range B (brain sulcus insertion part) on the way to the tip C'. It is the same as D, and the remaining range up to the tip C' (extraction area near the affected area) C has a width n and a thickness m.
It is also designed to gradually become smaller.

Note that the lengths of the ranges B and C mentioned above shall be determined appropriately depending on the location of the surgery.

(Function) This embodiment has the configuration described above, and the area C is used as an exclusion area near the affected area, and both the width n and the thickness m of this area are made smaller toward the tip. The flexibility increases as you move towards the end of the brain, making it extremely soft.As shown in Figure 2, it can be easily bent or bent to a small extent at the surgeon's will in order to expose and hold a small affected area within the brain. It can be bent, the spatula does not obstruct the view during surgery, and the tip range C is extremely soft, so there is no damage to the affected area, and the insertion point is sharper toward the tip. Following part B, there is an exclusion part C near the affected area, so it can be inserted deep into the brain, and blood vessels and aneurysms can be excluded very easily.

In addition, in this embodiment, the other end A ₂ of the brain vera A
Since the central body D and the thickness m ₁ are the same,
Like a conventional brain scraper, it can also be used to hold a retracted brain wound by being held in a brain scraper holder 1, for example as shown in FIG _.
Since _n1 is gradually reduced, it can also be used as a cerebral sulcus insertion site.

In addition, as another example of gradually reducing the thickness m as well as the width n in order to make the range C of the tip (exclusion area near the affected area) extremely soft, as shown in FIG. Thickness is reduced stepwise from m ₁ to m ₃ , and the outer part is made of a synthetic rubber material E having elasticity, such as silicone rubber (which exhibits elasticity in the range of -50 to 250°C, but has a thin metal plate part F in the core). (the thickness is gradually reduced toward the tip C').

[Effect of idea]

Since this device has the above-mentioned structure and function, it is possible to expose a small affected area in brain surgery, or easily bend or curve the exclusion part C near the affected area that is touched there at the surgeon's will. , Since the part C is located at the tip of the cerebral sulcus insertion part B whose width n gradually narrows, it can be inserted deeply into the cerebral sulcus, and when scraping the brain to expose a small affected area, it does not obstruct the surgeon's view.
In addition, the surgery can be easily performed on small parts of the brain without damaging the deep parts of the brain.

[Brief explanation of drawings]

Fig. 1A is a plan view of one embodiment of the brain blade according to this invention, Fig. 1B is a longitudinal sectional front view taken along the Ro-Ro line of Fig. 1A, and Fig. 1C is another embodiment. Figure 2 is an explanatory diagram of the state of use, Figure 3 A is a perspective view of a conventional parallel-width type brain blade, Figure 3 B is a perspective view of a tapered type brain blade, and Figure 3 B is a perspective view of a tapered type brain blade. Figure 4 shows explanatory diagrams of the usage conditions, A ₁ is the brain bella main body D
One end side, B is the range of the insertion part of the cerebral sulcus, C is the range of the excluded part near the affected area, C' is one end, _n1 is the width of the brain bellow body, _m1 is the thickness of the brain bellow body, n is The width of the affected area exclusion portion, m, indicates the thickness of the affected area exclusion portion, respectively.

Claims (1)

[Scope of utility model registration request] Brain bellow body D whose thickness m ₁ and width n ₁ are both constant
On one end side _A1 , only the width _n1 is directed toward the tip C',
In the brain vera A, which is gradually narrowing, the tip
The thickness _m1 up to range B on the way to C' is the same as that of the head body D, and the thickness m of the remaining range C up to the tip C' gradually becomes smaller as well as the width n. Brain wrasse characterized by being.