Fixator for bar of pectus excavatum repair operation

Abstract

The present invention relates to a fixation device for a correction bar used in the operation of pectus excavatum, and more particularly, to a fixation device for securing the correction bar inserted into a thoracic cavity to a rib in an operation of correcting pectus excavatum, which a sort of thoracic malformation. The fixation device of a correction bar used in the operation of pectus excavatum includes a plurality of rib fixation units fastened to the correction bar and each having a rib support portion and a fastening portion formed at both ends thereof, the rib support portion being formed of a hook portion bent in such a manner as to be hooked and secured to a rib, and the fastening portion being formed of a rectangular through-hole or a slot; and a fastening screw unit adapted to fasten the plurality of rib fixation units hooked and secured to upper and lower ribs to the correction bar through the respective fastening portions of the plurality of rib fixation units.

Claims

1. A device for repair operation of pectus excavatum, the device comprising: a correction bar having a curved shape along a longitudinal axis, through-holes provided at both longitudinal ends in a direction of a thickness, and having a middle portion for lifting a depressed thoracic wall in the middle portion; a plurality of rib fixation units including a first rib fixation unit and a second fixation unit which are fastened to the correction bar, the first rib fixation unit being formed with a first rib support portion and a first fastening portion formed at both ends thereof and the second fixation unit being formed with a second rib support portion and a second fastening portion which are formed respectively at both ends thereof and the first rib support portion and the second rib support portion being formed of a first hook portion and a second hook portion respectively bent in such a manner so as to be hooked fixed and secured to a lower rib or an upper rib, and the first fastening portion and the second fastening portion being formed of a first rectangular through-hole or a first slot and a second rectangular through-hole or a second slot, respectively; a fastening screw unit comprising a rectangular bottom portion, a side wall portion extended upward from both ends of the bottom portion, a fixation portion protruding upward from a top surface of the bottom portion between the side wall portions, two concave grooves formed by the side wall portion, the bottom portion, and the fixation portion for preventing the fixation portion from rotating by inserting the correction bar into the two concave grooves, and a screw formed on a top surface of the fixation portion, so as to be inserted through the rectangular through-hole or the slot of the fastening portion and one of the through-holes of the correction bar at the same time; wherein the correction bar and the plurality of the rib fixation units are arranged such that the screw is inserted through one of the through-holes of the correction bar, the first rectangular through-hole or the first slot of the first fastening portion and the second through-hole or the second slot of the second fastening portion, and thereby the correction bar is placed adjacent to outer surfaces of the upper rib and the lower rib, and a pair of the fastening portions overlap.

2. A device for repair operation of pectus excavatum, comprising: a correction bar having a curved shape along a longitudinal axis, through-holes provided at both longitudinal ends in a direction of a thickness, and a middle portion for lifting a depressed thoracic wall in the middle portion, wherein the correction bar is inserted after incising a portion under both armpits of a patient; and a plurality of rib fixation units including a first rib fixation unit and a second fixation unit which are fastened to the correction bar, the first rib fixation unit being formed with a first rib support portion and a first fastening portion formed at both ends thereof and the second fixation unit being formed with a second rib support portion and a second fastening portion which are formed respectively at both ends thereof and the first fastening portion and the second fastening portion being formed of a first rectangular through-hole or a first slot and a second rectangular through-hole or a second slot, respectively, wherein the rib fixation unit is inserted into the skin through the portion incised to insert the correction bar and operated to hook and secure the rib support portion to a lower rib, which is positioned below the correction bar, and then another rib fixation unit is inserted to make the rib support portion to be hooked and secured to an upper rib, which is positioned above the correction bar; and a fastening screw unit comprising a rectangular bottom portion, a side wall portion extended upward from both ends of the bottom portion, a fixation portion protruding upward from a top surface of the bottom portion between the side wall portions, two concave grooves formed by the side wall portion, the bottom portion, and the fixation portion for preventing the fixation portion from rotating by inserting correction bar into the two concave grooves, and a screw formed on a top surface of the fixation portion, so as to be inserted through the rectangular through-hole or the slot of the fastening portion and one of the through-holes of the correction bar at the same time, wherein, the correction bar and the plurality of the rib fixation units are arranged such that the screw is inserted through one of the through-holes of the correction bar, the first rectangular through-hole or the first slot of the first fastening portion and the second through-hole or the second slot of the second fastening portion, and thereby the correction bar is placed adjacent to outer surfaces of upper rib and lower rib, and the first fastening portion and the second fastening portion overlap, and wherein the correction bar formed at both ends thereof is supported by the fixation of the upper and lower ribs corresponding to the fastening screw unit and the rib fixation units, and supports the position lifted to a chest wall corresponding to the middle portion of the correction bar through ribs and chest walls.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a view showing a structure of bones constituting a chest;

(2) FIGS. 2a and 2b are views showing a principle of a Nuss operation;

(3) FIG. 3 is a view showing a conventional fixation device;

(4) FIG. 4 is a view showing an operation result obtained by using a conventional fixation device;

(5) FIG. 5 is an exploded perspective view showing the fixation device of the present invention;

(6) FIG. 6 is a view showing an operation result obtained by using a fixation device of the present invention;

(7) FIGS. 7(a) to 7(f) are views showing several embodiments of a rib fixation unit of the present invention;

(8) FIG. 8 is a view showing a screw used in the present invention, which is machined on the end of the correction bar;

(9) FIGS. 9(a) to 9(d) are views showing several forms of the fastening screw unit used in the present invention; and

(10) FIG. 10 is an exploded view showing usage of the screw of FIG. 9(b), FIG. 10(a) showing a state before inserting the fastening screw unit into a through-hole of the correction bar, and FIG. 10(b) showing a state after inserting the fastening screw unit into a through-hole of the correction bar.

(11) In the drawings, a reference numeral 10 denotes a rib, a reference numeral 100 denotes a correction bar, and a reference numeral 300 denotes a fastening screw unit.

DETAILED DESCRIPTION OF THE INVENTION

(12) Herein, FIG. 5 is an exploded perspective view showing a fixation device for a correction bar for use in the operation of pectus excavatum according to the present invention.

(13) In the present embodiment, a correction bar 100 is operated generally to be rotated to lift a sinking thoracic wall, after it is inserted into the thoracic wall as shown in FIG. 2(b).

(14) In addition, a rib fixation unit 200 is constructed of a rib support portion 210 formed at one side thereof to support ribs and a fastening portion 220 formed at the other side thereof, and it is inserted into the skin through a portion incised to insert the correction bar.

(15) As shown in FIG. 6, the rib fixation unit 200 inserted under the skin, is operated to hook and secure the rib support portion 210 to the rib 10, which is positioned below or above the correction bar 100, and then another rib fixation unit 200 is inserted to make the rib support portion 210 to be hooked and secured to the rib 10, so that the rib fixation unit 200 is secured to the correction bar 100 by means of a fastening screw unit 300 penetrating through the fastening portion 220 of the rib fixation unit 200 formed as a rectangular through-hole and the through-hole 102 formed at the end of the correction bar 100.

(16) In the present embodiment, although the rib support portion 210 is explained to be provided with a hook portion formed to be bent to a -like shape, as shown in FIGS. 7(a) to 7(f), the rib support portion 210 can be formed to various shapes to support the ribs. In addition, as shown in FIG. 7(f), the rib support portion 210 can be provided with a groove supporting the ribs. Moreover, the rib support portion can be configured to have a variety of shapes, in so far as it can be supported to the ribs without using a separate sewing thread or a steel wire.

(17) Furthermore, the fastening portion is formed at one end of a rib fixation unit, which is opposite to the rib support portion. Also, as shown in FIGS. 7(a) to 7(f), it may be machined as a rectangular through-hole or a slot shape, to facilitate the adjustment of the position of the peripheral ribs and the correction bar by an operator.

(18) Moreover, in the present embodiment, while the fastening screw unit is explained to be a separate male screw and a female screw. However, as shown in FIG. 8, it will be possible to form the through-hole of the correction bar 100 to be round and machine the inside thereof to be a female screw 310 so that it can be fastened to a male screw. Also, several through-holes can be provided on the correction bar 100.

(19) The fastening screw unit of the present invention can be machined into various forms as shown in FIGS. 9(a) to 9(d). It is also preferable to provide a fixation portion 320 in various forms, so that it is inserted into the through-hole of the correction bar to fix the position of the correction bar when the screws are fastened to each other.

(20) The fastening screw unit as shown in FIG. 9(c) comprises a bottom portion (330), a fixation portion (320) protruding upward from a top surface of the bottom portion (330), a skid-preventing means, comprising a flat portion (321) cut out from a part of a side of the fixation portion (320), for preventing the fixation portion from skidding when engaged with the through-hole of the correction bar, and a screw formed on a top surface of the fixation portion.

(21) The fastening screw unit such as FIG. 9(a), FIG. 9(b), and FIG. 9(d) comprises a rectangular bottom portion (330), a side wall portion (340) extended upward from both ends of the bottom portion (330) and formed, a fixation portion (320) protruding upward from a top surface of the bottom portion (330) between the side wall portions (340), and a screw (350) formed on a top surface of the fixation portion (320).

(22) The fastening screw unit shown in FIG. 9(b), as shown in FIG. 10, has the fixation portion (320) inserted through the through-hole (102) of the correction bar (100), and the correction bar (100) is inserted into two concave grooves (360) formed by the side wall portion (340), the bottom portion (330), and the fixation portion (320), and in operation the fastening screw unit would not be disengaged from the correction bar. Since the fastening screw unit engaging the correction bar is fixed without skidding when rotating and engaging the female screw (370) after inserting the fastening portion of the rib fixation unit into the male screw (350), the fixation and engagement are convenient.

INDUSTRIAL APPLICABILITY

(23) As described above, according to the fixation device of the present invention, for fixing the correction bar inserted into the thoracic wall in the operation of correcting the pectus excavatum, which is a type of malformation of the chest, following advantageous effects can be achieved.

(24) It is advantageous for the cosmetic treatment because the skin can be preferably incised to a thickness of the correction bar, and the operation can be carried out without the sewing on the periphery of the ribs, and the bleeding can be minimized.

(25) In addition, the operation is simple because the load of the correction bar can be dispersed and the correction bar can be accurately secured and removed easily.