WO2005027795A1

WO2005027795A1 - Instrument for taking and applying human scalp grafts, comprising interchangeable square-tipped needles

Info

Publication number: WO2005027795A1
Application number: PCT/MX2003/000078
Authority: WO
Inventors: Ramón Javier NAVARRO CEBALLOS
Original assignee: Navarro Ceballos Ramon Javier
Priority date: 2003-09-23
Filing date: 2003-09-23
Publication date: 2005-03-31
Also published as: AU2003272144A1

Abstract

The invention relates to a device which is used to cut, sample, take, remove, transport and conserve grafts, to prepare the receptor site and to inject minigrafts, using a single piece of equipment once and with one hand. The inventive device is portable, malleable, convenient and light. In addition, the low-cost device can be washed and sharpened and requires little maintenance. The device can be used to take a greater percentage of scalp minigrafts without damaging same, enabling the growth, development and maturation of said follicles until the final hair is obtained. At present, several surgeons and specialists are required in the operating theatre (more than 7) during surgery for an extended period of 8 hours or more in order for a maximum of 2,000 minigrafts to be attached. However, with the invention, only 2 people are required in order to operate on the patient, using a single gun or 2 devices simultaneously, thereby reducing the time/labour cost without damaging the donor areas. The device comprises an instrument which is made from medical grade steel and which can resterilised an infinite number of times without being damaged.

Description

INSTRUMENT FOR THE TAKING AND APPLICATION OF HUMAN SKIN GRAFTED WITH INTERCHANGEABLE NEEDLES OF SQUARE TIP.

FIELD OF THE INVENTION Its application is mainly in the Field of Surgery

Reconstructive and Human Dermatology. BACKGROUND OF THE INVENTION After making a thorough review of the patents published from 1969 to date both in Europe; America; Asia; and Oceania.

We find the patents described below without including those that are currently under study and are being published. Our device simplifies the process; Well, at the same time that it takes the grafts of 1 to 5 hairs per implant; The transports inserts them without injuring the follicles and without damaging the donor area. Making the cost cheaper;

Diminishing the relevant personnel and making the procedure simpler and simpler. Being eminently mechanical and pneumatic. Next, each of the patents that are most similar to the present application and their differences are described.

U. S. PatentNo. 5, 693, 064 date: Dec. 2/1997

Author: Arnold.

A dermal punch; That only takes and cuts the scalp but if it transports them, it does not sow them.

U. S. Patent No. 2003/0040766 To Date: Feb. 27, 2003

Author: Werner.

A very interesting pistol that only implants multiple hair grafts;

But do not take them your design is quite complicated. WO 02/096321 To date: May 28, 2002

Author: Lee Hoon Bum.

International patent classification: A 61 F 2/10

Another interesting patent that consists of a cartridge with springs without pneumatic suction that is capable of taking a single hair through a sliding cylinder that is projected with a piston. Powered by spring the disadvantage with respect to the current patent is that it does not have a trap and a sower or guide on the site to be implanted, in addition to only capturing a bit.

US Patent number 5417, 683 date: May 23/1995 Author: Shiao. Very curious syringe with multiple needles a plunger and springs that can implant several hair follicles at the same time but the difference with our patent is that it does not take them only applies them.

U.S. Patent number: 5, 873, 888 date: Feb 23/1999 Author: Constanzo.

It consists of a pistol with a plunger and a cartridge.

The tip has a scalpel blade (Scalpelo) that allows sowing.

The difference with our patent is that it does not take them from the donor site but must be prepared in advance. U.S. Patent number: 5, 984, 936 Nov. 16, 1999

Author: Mangubat.

This is a cut and processor device for small scalp grafts but does not transport them and does not implant them at the same time with respect to our patent under study. U.S. Patent 6120, 521 Sept. 19, 2000

Dilator and implant of scalp.

Author: Casparian.

It consists of 2 parts, a body that takes the grafts and another part that implants them. The author has another patent but has abandoned them. The difference with the current patent under study is that it is of 2 parts. It complicates its handling and cost.

U.S. Patent No. 5895, 403 date: April 20, 1999

Cutting Surgical Tool

Author: Collinsworth. It is a tool; Cylinder; Staggered and tunneled in its axis for the evacuation of the grafts by superior way. The difference with the present study is that it apparently takes them but does not implant them.

U.S. Patent No. 4, 476, 864 date: Oct / 16/1984

Multiple combination punches for hair transplant. Author: Tezel.

This is a light instrument; Laptop; With just the manual force you can take 1 or several bites from the donor site. Through cutting metal cylinders. The difference with the current patent under study is that it apparently only takes them but does not plant them in the receiving bed. U.S. Patent Nos. 5, 982, 279/5, 782, 851/5, 817, 120

Author: Rassman.

Instrument To implant hair.

Instrument To Transplant Hair.

Hair Implant Instrument. This author produces 3 very interesting designs. The first: It consists of taking several strips of scalp and cut them until you reach several uni or tri follicular grafts manually.

Then place the grafts on top of each other in a cartridge connected to an instrument to implant them in the donor area; Constantly feeding the cartridge with grafts. It uses the air suction to pass the grafts from the cartridge to the injector.

The second: It also requires the previous manufacture of the grafts to constantly feed the cartridge and the injector.

That is, you have to load the gun and cartridge with hairs. The third patent is only to place and implant the grafts previously cut and loaded in the gun and the cartridge.

The difference of these patents with ours is obvious; Do not take them directly but you have to cut them one by one and load them as long as in our current patent under study. It is not necessary to make these previous cuts, but this one does them once and for all.

U.S. Patent No. 6059, 807 May 9/2000

U.S. Patent No. 5827, 297 Oc 1/1998

U.S. Patent No. 5667, 661 Sep.2 / 1997

Author: Boudjema. These patents are quite interesting consist: The first one in:

A cylindrical instrument where a needle goes to carry 1 capillary (follicular) hair graft inside another needle. And inside the needle goes a cylinder that generates the vacuum when changing the graft inside the needle by 2 positions communicated by a small hole this procedure is only for one follicle compared with the present patent application under study; It is quite slow (one by one) tedious and only implants do not take them as in the current study.

The second patent of the same author; It is a needle that has inside a cylinder which rotates and rotates inside the needle and cuts at its distal end. Apply suction at its proximal end, to be able to extract said hair graft. This patent is the most similar to the present application under study. As for the mechanics; And idea of all studied.

It differs from the present study application in many parts and reasons.

First: Sola takes a small diameter graft. With the consequent slowness and boredom.

Second: We believe that the suction is insufficient to completely detach the follicle.

Third: We think it can damage the follicle.

Fourth: Lacks introducer; Injector or guide to enter it in the receiving area. Fifth: You work blindly since being the device so small it is difficult to guess the path of the follicles. The third patent of the same author is quite useful to cut and take the grafts of donor areas since it cuts them into strips that are easily adapted later; But with respect to our present application under study. It does not implant them or transport them.

Recent bibliographic reference: Barrera Alfonso, MD. Advances in Aesthetic Hair Restoration Aesth. Surg. Jour. 2003; 23: 259 - 264 CURRENT STATUS OF THE TECHNIQUE The current state of the various techniques for transplantation of human hair are reduced to taking a strip of scalp from the occipital area; Cut it in bevel in multiple mini-grafts of 1 to 3 follicles for each mini-graft and implant them manually in the donor area. They can not be placed or implanted beyond 2,000 to 2,500 self-grafts due to the fatigue factor; For which it is required 2 surgeons who take the graft (strip) and close the wound two others that cut into multiple fragments the strip of scalp.

Two others who implant these materials plus a circulating nurse plus the anesthetist: Minimum 8 people occupied during 8 hours of work to solve the problem in 2 or 3 sessions of 8 hours c / session. In contrast, this application under study only requires 2 people in the room; The surgeon and the assistant; Can be placed up to 300 grafts per session of 2.5 hours but with the use of 2 guns simultaneously could be placed up to 600 implants per session and solve the total problem in 4 or 5 more sessions, shorter time and lower cost. BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows the apparatus with the tail collapsed in a left side view. Figure 2 shows left side with collapsible tail. Figure 3 shows the right side of the apparatus. Figure 4 shows the top of the apparatus.

Figure 5 view of a longitudinal cross section with collapsed tail. Figure 6 same cut but with collapsible tail. Figure 7 view of a square tip needle with grafts inside. Figure 8 longitudinal top view with lancets projecting out of the tip of the needle. DESCRIPTION OF THE INVENTION Figure 1 shows the apparatus with the collapsible tail in a left side view has at the tip an interchangeable needle (B) of medical grade steel with the square tip sharpened and biblised (A) can be 14th thickest or 16th least thick in the first case. The light from the needle can capture 3 to 5 full hair follicles. In case 2 ^or can be captured from 1 to 3 hairs with their follicles. On each side of the needles are attached two lancets or T-shirts (D) joined at the top by a secondary trolley (C) that slides these t-shirts outside the tip of the needles and join 1 cm. from the tip of the needle. When this is introduced to the scalp and helps to detach the bite of its insertion or internal base without damaging the hair follicles that is to say they act as very fine forceps that take or capture the bite; These t-shirts are separated when they are out of the tissues by the needle and join within the cranial tissue. They are made of very resistant tempered medical grade steel with sharp tips and claws (see figure 8) inter combined at both ends. The secondary cart system (C) is a cart of approximately 0.5 m. x 1 cm with 4 holes. In the upper one, the pusher wire (N) of the secondary trolley (C) is welded to the middle one, the needle goes through it (B) and the rods (E) that hold both t-shirts (D) are attached to the pavilion. the needle (B) is fastened; Fixed and connected to the main body of the device by the metal clip (K) that connects the tip of the body (H) with the needle (B.) Using a screw (J) (see figure 3) the body of the device measures approximately. 5.08 cm. of diameter x 3 to 5 cm. long has 5 main parts:

Antebody (I) that measures approximately 5.08 cm. of diameter x 3.5 cm. approximately body (H) handle (W) tail (T) and tip (inside the pin's pavilion.) The whole body is hollow to have a vacuum chamber (Y) see. (Figures 5 and 6) and also between the body and the forebody can be divided into 2 parts by a thread that has an "o" ring (5ζ) to look for vacuum in the chamber and for cleaning and maintenance purposes. The antecuerpo has a hollow metal handle (W) attached to its side for two purposes. First for better grip; Prehension and maneuverability, Second so that in the future it can be added inside; Cables; Tubes-Micro chips and switches.

Always on the right side of the forefoot there is a groove (L) where the primary cart (LL) slides quadrangular with 2 perforations 1 along its body so that the pusher wire (N) of cart 2 slides ^or being imprisoned by the screw (M) that at the same time that fixes the primary cart and the wire serves as a button. The secondary cart pusher (C) said side of the forebody has a U-shaped blade (P) in the lower third from the distal end of the forearm fixed to said end by means of 2 screws (O) and whose main mission is to avoid that the primary cart of its channel comes out serving him as stop. Always in the same figure 1 on its right side. There is another element in the form of horn or "T" hollow (Q) that has 2 ends by its base is screwed to the forebody and communicates with the empty chamber of the body (Z) (see figure 5 and 6) and by the horns the thick (R) is connected to the hose or suction tube and the thin one (S) is plugged by the thumb of the operator to increase the vacuum in the chamber. When the appliance is in operation. Always in Figure 1 the tail of the device (T) measuring 3.5 cm is observed. Approximately approximately 1.5 inches in diameter and having a tube measuring approximately 4 cm as a cap (U) or telescopic tubular T-shirt. long x 5.08 cm. diameter; Hollow inside with a longitudinal channel on its left side that measures about a window of approximately 3.5 cm. long x 4 mm. Wide. It has at its distal end of the tail and window a screw (G) that serves as a stop to the cap so that it does not leave the tail when it is telescoped. The function of this cap is to bring the main pusher (F), which runs longitudinally through the whole apparatus in the center as a main axis, to its roof or upper extremity. Said axis is a wire of a size somewhat smaller than 16 or 14 respectively, it has at its distal end welded the telescopic cap (U) and at its front or lower end a plastic (F ") that prevents the graft taken by the needle locked between the light of the needle and the pusher and on the other hand that allows the passage of air in both directions and finally that can slip inside the light of the needle without locking and also prevent the grafts from passing into the chamber empty. {That is to say it also serves as a stop.) At the medial end (upper third) of the pusher (F) there is another seal "o" ring (F '), generating greater suction capacity towards the tip of the needle. to figure 2 this is a right side view of the apparatus with the telescope cap on the tail where no new elements appear, the rest of the components have already been widely described in the previous figure.

With respect to figure 3 this view is a view of the left side where no new elements are visible except for the needle clamp screw (J) with the forefoot.

With respect to figure 4 this is a top view.

Where there are no new elements but it gives a new perspective of the previously described elements in general.

With respect to figure 5 this is a longitudinal cross section to try to capture the inner mechanism and its movement that has been neatly described in figure 1 paragraph 20 to 30. It also carries the communication (Z) of the hollow T (Q) with the hollow ante-body I with the body (Y.) With respect to figure 6 this is another cross section of the apparatus with the telescoping cap and the tip of the pusher (F ") retracted towards the needle canopy (B) and the communication (Z) of the hollow T with the ante-body and hollow inner chamber (Y) figure 7 shows a caliber needle 16 but it can be 14, but with the square tip and bi-bevelled with a cutting edge for the punch, and several bites in its interior, with respect to figure 8.- This shows all the characteristics described above is only put to illustrate the mode of action of the lances or captive side shirts (D.)

The mechanism and function of the appliance whose application is present; It consists of the following; Since the current state of the art worldwide consists of cutting strips of scalp. Either with scalpel or laser from the back of the head; Close the wound and cut the grafts into multiple fragments and reinsert them back into the physical receiving areas; Through magnifiers and very fine instruments; Our application in study takes; Secciona- corta- transporta- places and inserts said grafts in place by a single equipment; By a single person; Without damaging the follicles or the donor area.

As follows: Under local and regional anesthesia of the patient. This anesthesia of the areas to be treated lasts approximately 2 hours. The tip of the device needle is inserted into the donor areas of the neck with an angle of 45 ° with respect to the head, trying to follow the path of the hair follicles. The needle, as it is sharp, is inserted into the scalp up to 1 cm. without reaching the bone because previously this area dilated (swollen) up to 3 cm. for the use of the subcutaneous anesthetic liquid. The needle is not inserted beyond 1 cm. because the side T-shirts (D) serve as a stop in their union with the cart 2 ^or (C) even though the hair grafts remain inside the light of the caliber of the needle; But these hairs and follicles inside the light of the needle are cut off; Sectioned but still attached to its bed therefore, if at this time the needle were removed the hairs would not leave the receiving bed because they are still connected, but if they would come out of the needle. Unless we applied a force of attraction to the needle by suction; Even so, the suction is not enough to detach them, so the side T-shirts (D) come into action, which, when they go beyond the tip of the needle into the cephalic tissue, practically release the hair follicles from their base intact and complete. As if they were micro clips. This would be equivalent to an injection, so there is no trace left in the donor area. And not it requires stitches or requires the patient to take analgesics later.

The graft captured by the punch of the needle is captured in the intraguja lumen; It is carried or transported to the frontal receptor areas and by means of a previous incision with the No. li scalpel or the same instrument practices a punch or perforation in each of the receptor areas. This incision is extended to the deep tissues following the path of the hair follicles by means of the guides that are the t-shirts that are introduced below the frontal skin plus or minus 1 cm. opening space for sowing the grafts in a suitable place. When removing the side shirts; It comes almost simultaneously the tip of the pusher (F) carrying the grafts to deposit in its new bed this can be done every 5 millimeters a graft of another. And in another session. Since the grafts are well integrated; Fill or fill more distances up to 4 and 5 millimeters apart between each graft. The square tip of the needles takes square grafts which allows that in the normal healing process the grafts are not constricted or asphyxiated since it is well known that the cicatricial contracture when it is round; Squeezes and hangs the implanted neo implants avoiding this problem for square punching with hair follicular grafts. The process can be done with 2 pistols maybe three, and the head can carry a double mechanism of 2 or more needles to further streamline the process.

In short, the apparatus whose current request is in the present study; It not only simplifies a whole process but saves personnel; Weather; Costs and less discomfort for patients with satisfactory results in the growth and development of transplanted hair follicles. In addition, they can fit up to 3 snacks on each needle (Fig. 7)

Claims

CLAIMS I have described my invention widely as a novelty and therefore claim as my exclusive property contained in the following clauses. An apparatus for the taking; capture; section; aspiration; detachment; transport; sowing and fixation of human scalp grafts. Characterized by:

1.- The important thing is a cutting needle that has 2 sliding side shirts. A secondary sliding trolley that carries lancets or T-shirts.

A hollow suction T where on the one hand it is connected to the vacuum; Another arm of the T connects to the suction chamber and the other arm of the T remains open or closed at the user's disposal to fractionate the grafts. (That is, a three-way key.)

A means to move and slide the carts I ^o and 2 ^o . A screw to slide both carts. A cart I ^or metal. To push the cart 2 ^o . Handle to hold the device firmly. A sliding channel. A vacuum chamber.

A longitudinal central plunger to push the grafts. A needle holder

2. An apparatus such as the one claimed in claim clause 1 where there are 2 lancets or side vests that fulfill several functions a) serve as a stop to the penetration greater than 1 cm. on the scalp b) delicate clamp to detach the grafts from its bed c) asymmetry of these tips so that they remain closed off the needle and open next to the needle serve these lancets to seed the grafts in the recipient skin.

3. An apparatus as claimed in any of the previous clauses where the longitudinal plunger has a tip that performs several functions a) serves as a stop so that the grafts do not pass into the empty chamber b) do not lock the grafts between it and the intraguja light c) allow the passage of air. Through slots in its periphery.

4.- A needle with a square tip that is both cut and cut; Section and penetrate. It prevents, by its square design, the subsequent normal cicatricial constriction of round grafts.

5. An apparatus such as the one referred to in any of clauses 1 to 3, where the suction T suction on the one hand is connected to the vacuum; other The arm of the T connects to the suction chamber and the other arm of the T remains open or closed at the user's disposal to fractionate the grafts.

6. An apparatus as referred to in clauses 1 to 3 and 5. Where said carts serve the function of pushing the lancets and withdraw them with a single finger. Beyond the tip of the needle.

7.- Apparatus such as the one referred to in clause 1, characterized in that it has 2 sliding shirts.

8. An apparatus as the one referred to in any of claims 1, 2, 3, 5,

6, or 7 using square-tipped biscuit needles.