WO2013112038A1

WO2013112038A1 - Syringe-type surgical clamp

Info

Publication number: WO2013112038A1
Application number: PCT/MX2013/000004
Authority: WO
Inventors: Arnoldo GUZMAN SANCHEZ; Eduardo RODRIGUEZ DE ANDA
Original assignee: Guzman Sanchez Arnoldo
Priority date: 2012-01-10
Filing date: 2013-01-07
Publication date: 2013-08-01
Also published as: MX2012000530A

Abstract

The invention relates to a syringe-type hermetic occlusion surgical clamp for the cervix, intended for use in cases of placenta praevia, said clamp being formed by two occlusion segments, two semi-cylindrical pull elements and a frame formed by a main part and a secondary part. The main part is a hollow cylindrical element having a conical section at one of the ends thereof, inside which two semi-conical sections are coupled. This coupling allows the occlusion segments to be moved toward or away from one another. The secondary part is a hollow cylindrical element having one closed end and one open end. The thickness of the cylinder is reduced inside the open end and this area of reduced thickness is coupled to the area of the circumference of the main part that has a reduced cross-section.

Description

SURGICAL CLAMP, SYRINGE TYPE

TECHNICAL FIELD The present invention relates to an occlusion syringe-type clamp that is used surgically to hermetically close the cervix; It is a mechanical device that hermetically closes the duct of the cervix, and does not allow blood to flow through the duct during the operation of a patient with a bleeding placenta previa.

BACKGROUND

There is no specific tool to achieve airtight closure of the cervix canal, when an operation is performed by placenta previa.

Although there are some surgical forceps, called Pozzi as shown in figure 1, or those of Museux (see figure 2), or that of Allis (see figure 3) and also that of Lahey (see figure 4); but these tweezers do not fulfill the purpose of producing a hermetic occlusion to which we have referred, and also the design of the referred tweezers causes damage to both the vaginal tissue and the cervix; especially; It is very difficult with these tweezers to fully cover the neck of the womb, and press enough to occlude it. On the contrary, the invention that we propose achieves airtight occlusion of the canal of the cervix, and its design does not produce any lesion both in the vagina, and in the cervix. This invention also has the appropriate dimensions for the space it occupies in the vaginal canal and its surroundings.

Since we have used the occlusive clamp, we have no longer had any bleeding through the duct of the cervix. Problem to solve:

Reduce maternal death due to bleeding.

The World Health Organization, points to maternal bleeding as the leading cause of maternal death in Latin America, which is a tragedy. The fifth objective of the World Health Organization states, "We must reduce maternal death", an objective that must be addressed.

Way to solve the problem:

The problem of bleeding to which we refer, we have solved it using the surgical syringe-type forceps that are hermetic occlusion of the neck of the female womb, proposed by the present invention, for cases of placenta previa.

By achieving the hermetic occlusion of the canal of the womb, through the use of our syringe-type clamp, it is possible to prevent the blood flow that flows through the duct of the womb neck; This blood originates from a small portion of the placenta that is detached from the inner face of the womb.

When the hermetic occlusion of the cervix duct is achieved, we manage to stop the blood flow at this level; What happens is that blood accumulates between the occluded part and the site that generates the bleeding that comes from the place of insertion of the placenta that has partially detached. The above mechanism balances the blood outlet pressure of the placenta with the pressure that is generated due to the accumulation of blood in the space between the site of the occlusion of the clamp and the blood outlet. This means that no more blood flows to the aforementioned space. The experience with the performance of 66 surgeries in which the clamp proposed by the present invention was applied, demonstrates the usefulness of this tool depending on the fact that there has been no bleeding through the duct of the cervix.

DETAILED DESCRIPTION

The present invention proposes a hermetic occlusion forceps of the female matrix neck for cases of placenta previa, it is an essentially cylindrical device. It consists of three mutually assembled main parts, which are the following:

1. - Occlusive segments, see figure 5.

2. - Semi traction cylinders, see figure 6.

3. - Armor, see figure 7.

1.- Occlusive segments, see figure 5: They are two elements responsible for compressing the neck of the female matrix to occlude it. These occlusive segments, figure 5, are initially separated by the action of an expander spring, (5.1). The compressive ends of the occlusive segments, figure 5, open sufficiently to trap the cervix. At the opposite end, each occlusive segment, figure 5, has a semi-conical section (5.2) and in addition each semi-conical segment (5.2) has a semi-cylindrical (5.3) drilled, which overlap each other and join with a bolt (5.4) to the semi traction cylinders, see figure 6; the bolt (5.4) serves as the axis of rotation of both occlusive segments, figure 5. In addition both occlusive segments, figure 5, have a toothed section with pointed termination, which when approaching does not make end-to-end contact, but alternates the positions of the teeth of the occlusive segment, figure 5, upper with respect to the teeth of the occlusive segment, figure 5, lower. The endings of the teeth can have different shapes. Also the expander spring (5.1) is allowed to be replaced by any other element that causes the separation of the occlusive segments, Figure 5.

Also the semiconic sections (5.2) of the occlusive segments, figure 5, are allowed to be in any other way. In the same way, the overlapping of the semi-cylindrical sections (5.3) of each occlusive segment, figure 5, are allowed to have different forms of assembly.

In addition, the bolt (5.4) connecting the occlusive segments, Figure 5, is allowed to be replaced by any other element that fulfills the same functions.

2.- Semi Traction Cylinders, see figure 6: These semi cylinders are two, and each half cylinder has two flat surfaces oriented at 90 ° with respect to each other. One of the flat surfaces is approximately one third of the total length of each traction half cylinder. This flat surface has two slopes (steps); first slope (6.1) and second slope (6.2). The approximation of the first two slopes (6.1) allows a space between these first two slopes, which is generated by approaching the two largest flat surfaces (6.3) of the semi cylinders. This space allows the housing of the semi-cylinders (5.3) of the occlusive segments.

In both second slopes (6.2) there is a medium threaded hole (6.4), to which the clamping cylinder (6.5) is screwed.

Both traction half cylinders, figure 6, are attached to the semi cylinders (5.3) of the occlusive segments, figure 5, by means of the bolt (5.4).

On each flat major surface (6.3), at the opposite ends of the first slopes and second slopes, a hole is machined on the two major flat surfaces (6.3). In these holes a spring (6.9) is placed that separates both semi traction cylinders, figure 6. On the outside of one of the traction semi-cylinders, figure 6, a series of grooves (6.6) are machined that engage with the clamp (segment) of attachment (7.1) of the reinforcement, figure 7.

Adjacent to the series of grooves (6.6), a threaded terminal bore (6.7) is machined, to which the release cylinder (6.8) is screwed.

Also the spring (6.9) is allowed to be replaced by any other element that causes the separation of the traction half cylinders, figure 6.

In addition, the clamping cylinders (6.5) are allowed other ergonomic shapes.

Likewise, semi-traction cylinders are allowed to be replaced by any other traction element or system.

Also, the series of grooves (6.6) and of the attachment (segment) of clamping (7.1), are allowed to be changed by any other geometric shape that fulfills the same purpose.

In the same way, the different elements of the tweezers can have an anti-skid finish. 3.- Armor, see figure 7. This structure corresponds to the cover of the surgical clamp, syringe type, hermetic occlusion; which is formed of two parts: 1.- the main part (7.2) and 2.- the secondary part (7.3).

The main part (7.2) is an essentially cylindrical element, hollow all along its longitudinal axis that covers from the semi-conical sections (5.2) of the occlusive segments, figure 5, to the intermediate part of the groove series (6.6 ). At one end of the armor it has a conical section (7.4); in whose inner part the semi-conical sections (5.2) of the occlusive segments are coupled, figure 5. This coupling makes it possible to separate or approximate the occlusive segments, figure 5. After the conical section (7.4), it has machined, diametrically opposed, two elliptical grooves (7.5) that allow the passage of the clamping cylinders (6.5).

At the end of the main part (7.2), a reduction of the circumference (7.6) is machined. In this reduced section of the circumference (7.6), there is the bolt of the reinforcement (7.7), which serves to couple the main part (7.2) with the secondary part (7.3) of the reinforcement.

In a portion of the terminal part of the reduced section of the circumference (7.6), the attachment appendage (segment) (7.1) was machined.

The secondary part (7.3) is a hollow cylindrical element with one closed end (7.8) and the other open end (7.9). In the inner part of the open end (7.9), it has a reduction in the thickness of the cylinder that engages with the reduced section of the circumference (7.6), of the main part (7.2).

Also, on the surface of this same end, an "L" shaped slot (7.10) is machined, which is coupled to the armature bolt (7.7). Likewise, the reinforcement bolt (7.7) and the "L" shaped groove (7.10) can be configured in any other way that allows the assembly of the main part (7.2) with the secondary part (7.3) of the armor.

In addition, a smaller elliptical groove (7.11) has been machined that allows the passage of the release cylinder (6.8). The assembly of the total number of the parts that constitute the surgical clamp, syringe type, hermetic occlusion of the cervix, is presented in Figure 8.

Integral mechanism of why the occlusive segments, figure 5, are closed (or separated) to achieve hermetic occlusion of the cervix:

The closure of the occlusive segments, figure 5, which initially must be separated, occurs when a movement similar to that of a syringe is performed manually, where the syringe plunger is inserted progressively into the cylindrical part of the syringe, see figure 9 (a). With this movement, the clamping cylinders (6.5) are pulled causing progressive approximation of the occlusive segments, figure 5, see figure 9 (a), (b) and (c); in these figures the clamps (8) and the position of the hand (9) are shown. To separate the occlusive segments, figure 5, the release cylinder (6.8) is pressed.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1, Pozzi clamp:

Part (1): Tip of the clamp; characterized by having two sharp elements (one in each arm). Part (2): Spindle axis; which allows the opening or closing of the arms of the clamps. Part (3): Clamping rings and control of the opening or closing of the clamp arms. Part (4): Clamping grooves and pressure adjustment of the clamp tip.

Figure 2, Museux clamp:

Part (1): Tip of the clamp; characterized by having two sharp elements in each of the arms. Part (2): Spindle axis; which allows the opening or closing of the arms of the clamps. Part (3): Clamping rings and control of the opening or closing of the clamp arms. Part (4): Clamping grooves and pressure adjustment of the clamp tip.

Figure 3, Allis clamp:

Part (1): Tip of the clamp; characterized by having small grooves in each of the arms. Part (2): Spindle axis; which allows the opening or closing of the arms of the clamps. Part (3): Clamping rings and control of the opening or closing of the clamp arms. Part (4): Clamping grooves and pressure adjustment of the clamp tip.

Figure 4, Lahey clamp: Part (1): Tip of the clamp; characterized by having three sharp elements in each of the arms. Part (2): Spindle axis; which allows the opening or closing of the arms of the clamps. Part (3): Clamping rings and control of the opening or closing of the clamp arms. Part (4): Clamping grooves and pressure adjustment of the clamp tip.

Figure 5, Occlusive Segments.

Figure 6, Semi Traction Cylinders.

Figure 7, Armor.

Figure 8, Assembly of the total number of parts.

Figure 9. Manual positioning for closing occlusive segments.

The claims that are claimed below are based on the fact that the problem of bleeding from placenta previa is a serious complication that occurs during a cesarean section, which we are offering with our device an alternative solution that we have experience in the Civil Hospital Fray Antonio Alcalde, from Guadalajara Jalisco.

The review of experiences prior to ours does not show that there are devices that solve this problem.

Claims

CLAIMS Having described my invention, as before, I consider the content of the following claims as a novelty and claim of my property.

1 .- A surgical clamp, syringe type, hermetic occlusion of the neck of the female womb in cases of placenta previa, comprising;

Occlusive segments, which includes an expander spring, (5.1); at one end of each occlusive segment it has a semi-conical section (5.2) and in addition each section has a semi-drilled cylinder (5.3), which overlaps each other, and is connected with a bolt (5.4) to the traction half cylinders; Semi traction cylinders; they are two, and each one has two flat surfaces oriented at 90 ° to each other. One of the flat surfaces, of each semi cylinder, has two slopes (steps); a first slope (6.1) and a second slope (6.2). Approaching the two second slopes (6.2) generates a space between the first slopes; in the second slopes (6.2) there is a medium threaded hole (6.4), to which the clamping cylinder (6.5) is screwed; both semi traction cylinders are joined to the semi cylinders (5.3) of the occlusive segments, by means of the bolt (5.4); on the flat major surface (6.3), located at the opposite end of the first and second slopes of each traction semi-cylinder, it has a hole, on the two major flat surfaces (6.3), between these holes a spring is placed (6.9 ) that separates both semi traction cylinders; on the outside of one of the traction semi-cylinders, it has a series of grooves (6.6) that engage with the attachment (segment) of attachment (7.1) of the armature; adjacent to the series of grooves (6.6), it has a threaded terminal bore (6.7), to which the release cylinder (6.8) is screwed;

An Armor, which corresponds to the surgical clamp cover, which is formed of two parts: 1 .- the main part (7.2) and 2.- the secondary part (7.3); the main part (7.2) is a cylinder, hollow in its longitudinal axis, which covers from the semi-conical sections (5.2) of the occlusive segments, up to the middle part of the groove series (6.6), at one end has a conical section (7.4); in whose inner part the semi-conical sections (5.2) of the occlusive segments are coupled. This coupling makes possible the separation or approximation of the occlusive segments, the reinforcement also has two elliptical grooves (7.5) that allow the passage of the clamping cylinders (6.5); likewise, the reinforcement has a reduction in the circumference (7.6) where the reinforcement bolt (7.7) is located, which serves to couple the main part (7.2) with the secondary part (7.3) of the reinforcement; in a portion of the terminal part of the reduced section of the circumference (7.6), it has the attachment (segment) of clamping (7.1); The secondary part (7.3) is a hollow cylindrical element with one closed end (7.8) and the other open end (7.9). In the inner part of the open end (7.9), it has a reduction in the thickness of the cylinder that is coupled with the reduced section of the circumference (7.6), of the main part (7.2); Also, it has an "L" shaped groove (7.10), which is coupled to the armature bolt (7.7); In addition, it has a smaller elliptical groove (7.1 1) that allows the passage of the release cylinder (6.8).

2 - The surgical clamp, syringe type, hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to claim 1, which is further characterized in that the clamping cylinders (6.5) are allowed other ergonomic shapes.

3. - The surgical clamp, syringe type, hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to claim 1, which is further characterized by the fact that the expander spring (5.1) and / or the spring (6.9 ) are allowed to be replaced by any other element that causes the separation of the occlusive segments, and the semi-cylinders, respectively.

4. - The surgical clamp, syringe type, of hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to claim 1, further characterized in that the semi-conical sections (5.2) of the occlusive segments are allowed to be in any other way.

5. The surgical clamp, syringe type, hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to claim 1, which is further characterized in that the overlapping of the semi-cylindrical sections (5.3) of each occlusion segment , are allowed to have different forms of assembly.

6. The surgical clamp, syringe type, hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to claim 1, which is further characterized in that the bolt (5.4) that joins the occlusion segments is allowed to be replaced by any other element that fulfills the same functions.

7. - The surgical clamp, syringe type, hermetic occlusion of the neck of the female womb in cases of placenta previa, according to claim 1, is further characterized in that the armature bolt (7.7) and the groove in the form of "L "(7.10), can be configured in any other way that allows the assembly of the main part (7.2) with the secondary part (7.3) of the reinforcement.

8. - The surgical syringe-type forceps with hermetic occlusion of the neck of the female womb in cases of placenta previa, according to claim 1, is further characterized in that each of the constituent parts of the occlusion clamp has the possibility of being changed by other morphologies that allow it to fulfill the functions of the surgical clamp, syringe type, hermetic occlusion.

9. - The surgical clamp, syringe type, hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to claim 1, which is further characterized in that the traction semi-cylinders are allowed to be replaced by any other element or traction system

10. - The surgical clamp, syringe type, of hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to the claim, which is further characterized in that both occlusive segments have a serrated section with pointed termination, which when approaching they do not make end-to-end contact, but alternate the positions of the teeth of the upper occlusive segment with respect to the teeth of the lower occlusive segment; furthermore said tooth endings may have other configurations than the tip end.

11. - The surgical clamp, syringe type, of hermetic occlusion of the neck of the female matrix in cases of placenta previa, according to claim 1, which is further characterized in that, the different elements of the clamps can have an anti-skid finish.

12. - The surgical clamp, syringe type, hermetic occlusion of the neck of the female womb in cases of placenta previa, according to claim 1, which is further characterized in that the series of grooves (6.6) and of the attachment (segment) of support (7.1), are allowed to be changed by any other geometric shape that meets the same purpose.