US20160367291A1 - Ankle fixation system - Google Patents

Ankle fixation system Download PDF

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Publication number
US20160367291A1
US20160367291A1 US15/180,946 US201615180946A US2016367291A1 US 20160367291 A1 US20160367291 A1 US 20160367291A1 US 201615180946 A US201615180946 A US 201615180946A US 2016367291 A1 US2016367291 A1 US 2016367291A1
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US
United States
Prior art keywords
clamp
clamping
spherical portion
assembly
bone pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/180,946
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English (en)
Inventor
Nathan Erickson
Nathan Plowman
Neil Etherington
Andrew R. Fauth
Jason W. Nascone
Robert O'Toole
Thomas Meyers
Russell M. Parrott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zimmer Inc
Original Assignee
Nathan Erickson
Nathan Plowman
Neil Etherington
Andrew R. Fauth
Jason W. Nascone
Robert O'Toole
Thomas Meyers
Russell M. Parrott
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nathan Erickson, Nathan Plowman, Neil Etherington, Andrew R. Fauth, Jason W. Nascone, Robert O'Toole, Thomas Meyers, Russell M. Parrott filed Critical Nathan Erickson
Priority to US15/180,946 priority Critical patent/US20160367291A1/en
Publication of US20160367291A1 publication Critical patent/US20160367291A1/en
Assigned to ZIMMER, INC. reassignment ZIMMER, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ETHERINGTON, NEIL, Erickson, Nathan, FAUTH, ANDREW R., PLOWMAN, NATHAN, PARROTT, RUSSELL M.
Priority to US16/598,043 priority patent/US11134988B2/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6416—Devices extending alongside the bones to be positioned with non-continuous, e.g. hinged, pin-clamp connecting element
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6425—Devices extending alongside the bones to be positioned specially adapted to be fitted across a bone joint
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/645—Devices extending alongside the bones to be positioned comprising a framework
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6458—Devices extending alongside the bones to be positioned with pin-clamps fixed at ends of connecting element
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6441—Bilateral fixators, i.e. with both ends of pins or wires clamped

Definitions

  • This disclosure pertains generally, but not by way of limitation, to systems, devices and methods for external fixation of joints and/or fractured bones.
  • Short-term or temporary stabilization may allow soft tissues to recover from trauma prior to definitive skeletal fixation; for example, reduction of swelling, healing of open wounds, and/or healing of skin abrasions prior to open reduction and internal fixation.
  • External fixation may also be used when transportation is required from the site of initial care, such as a local or rural hospital to a secondary site with appropriate trauma capabilities, such as a regional trauma center.
  • Short-term stabilization may also be used for injuries that occur during periods of time when appropriate trauma care is not available, such as after hours, until a skilled clinician becomes available. Short-term stabilization may be appropriate in battlefield or field hospital situations. There is a need for external fixation systems and methods which are simple, easy, and affordable.
  • this disclosure is directed to a clamping assembly comprising a longitudinal member having a first end and a second end, the second end defining a first clamp; a second clamp configured to attach to the first end of the longitudinal member and connect to a rod assembly; a clamping member including a first end, a second end defining a spherical portion, and a third clamp, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member.
  • this disclosure is directed to a metatarsal bone pin clamping assembly
  • a longitudinal member having a first end and a second end, the second end defining a first clamp, the first clamp including a spherical clamping surface; a U-shaped clamp configured to attach to the first end of the longitudinal member and connect to a rod assembly; a clamping member including a first end, a second end defining a spherical portion configured to expand, and a third clamp; a first fixation bolt extending through a portion of the clamping member and the spherical portion; a nut configured to receive an end of the first fixation bolt; and a first bone pin locking member including a spherical portion, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member, wherein the spherical clamping surface of the first clamp is configured to receive the spherical portion and form a polyaxial joint between the clamping member and the longitudinal member, wherein the spher
  • this disclosure is directed to an external fixation system comprising: a first clamp assembly; a second clamp assembly; a rod assembly secured to and extending between the first clamp assembly and the second clamp assembly, the first rod assembly including a first tubular member and a second tubular member received in the first tubular member; and a bone pin clamping assembly comprising: a longitudinal member having a first end and a second end, the second end defining a first clamp; a second clamp configured to attach to the first end of the longitudinal member and connect to the rod assembly; a clamping member including a first end, a second end defining a spherical portion, and a third clamp, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member.
  • this disclosure is directed to a method for external fixation of a limb, the limb having a first bone portion, the method comprising: securing a first bone pin to the first bone portion; attaching a pre-assembled external fixation system to the first bone pin, the external fixation system comprising a rod assembly; securing a second bone pin to a bone in a foot; attaching a clamping assembly to the rod assembly, the clamping assembly comprising: a longitudinal member having a first end and a second end, the second end defining a first clamp; a second clamp configured to attach to the first end of the longitudinal member and connect to the rod assembly; a clamping member including a first end, a second end defining a spherical portion, a bone pin locking member, and a third clamp configured to receive the bone pin locking member, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member; aligning the bone pin locking member of the clamping assembly with the second bone pin; inserting the second
  • FIG. 1 is a perspective view of an external fixation system, secured to a tibia, a calcaneus, and a metatarsal, in accordance with this disclosure.
  • FIG. 2 is a side view of the external fixation system of FIG. 1 , in accordance with this disclosure. For purposes of conciseness, FIG. 2 will not be described separately.
  • FIG. 3 is a side view of the external fixation system of FIGS. 1 and 2 , in accordance with this disclosure. For purposes of conciseness, FIG. 3 will not be described separately.
  • FIG. 4 is an exploded view of the clamping assembly 108 of the external fixation system of FIGS. 1-3 .
  • FIGS. 5A and 5B depict perspective views of the clamping assembly 108 of FIG. 1 .
  • FIG. 6 is a cross-sectional view of the clamping assembly 108 of FIG. 1 .
  • FIG. 7 is a perspective view of an example of a clamping strut assembly.
  • FIG. 1 is a perspective view of an external fixation system, in accordance with this disclosure.
  • the external fixation system 100 of FIG. 1 can be configured to immobilize an ankle joint, for example.
  • the external fixation system 100 can include a clamp assembly 102 , a first rod assembly 104 , a second rod assembly 106 , a bone pin clamping assembly 108 , a first clamping strut assembly 110 , a second clamping strut assembly 112 , and a kickstand member 114 .
  • the clamp assembly 102 of FIG. 1 can include a clamp body 116 configured to receive one or more bone pins 118 A, 118 B, and having a first clamp 120 and a second clamp 122 .
  • the first clamp 120 is configured to receive an end of the first rod assembly 104 and the second clamp 122 is configured to receive an end of the second rod assembly 106 .
  • An example clamp assembly 102 is described in detail in commonly assigned U.S. patent application Ser. No. 14/456,407, titled “External Fixation”, to Triplett et al. and filed on Aug. 11, 2014, the entire content of which is incorporated herein by reference.
  • the first rod assembly 104 can include an outer or first tubular element 124 , an inner or second tubular element 126 , a locking screw 128 , and a rod clamp assembly 130 .
  • the first tubular element 124 has a first end 132 and a second end 134 and shaft 136 extending therebetween.
  • the second tubular element 126 has a first end 138 and a second end 140 and a shaft 142 extending therebetween.
  • the first tubular element 124 is larger in diameter than and coaxially receives a portion of the second tubular element 126 .
  • the tubular elements may be circular in cross-section as shown, or, in other embodiments, may be square, rectangular, triangular, or any other polygonal shape in cross-section.
  • the tubular elements may also be referred to as rods, rod elements, or rod members.
  • the second rod assembly 106 is substantially similar to the first rod assembly 104 and, for purposes of conciseness, will not be described separately.
  • the first clamping strut assembly 110 can include a first clamp 144 configured to receive an end 132 of the first rod assembly 104 .
  • the first clamping strut assembly 110 can include a first fixation bolt 146 that, when tightened, securingly engages the end 132 of the first rod assembly 104 .
  • the first clamping strut assembly 110 can further include a second clamp 148 configured to securingly engage one or more bone pins 150 A, 150 B, e.g., calcaneal pins.
  • a fixation bolt is tightened (shown at 228 in FIG. 7 )
  • the bone pins 150 A, 150 B can be secured between a plate 152 and a body 154 of the first clamping strut assembly 110 .
  • the second clamping strut assembly 112 is substantially similar to the first clamping strut assembly 110 and, for purposes of conciseness, will not be described separately.
  • the system 100 of FIG. 1 can further include a kickstand member 114 .
  • the kickstand member 114 can be affixed to the first clamping strut assembly 110 using a second fixation bolt 156 and to the second clamping strut assembly 112 using a third fixation bolt (not depicted in FIG. 1 ).
  • the kickstand member 114 can be rotated behind the patient's heel (as shown in FIG. 1 ) or under the patient's foot (not depicted).
  • a clinician e.g., physician
  • can grip the kickstand member e.g., at portion 158 , and pull axially in order to get traction on the patient's ankle while setting the ankle fracture.
  • the kickstand member 114 is rotated behind the patient's ankle (as shown in FIG. 1 )
  • the patient's foot can be elevated to improve blood flow, for example.
  • the kickstand member 114 is not attached to the bone pins 150 A, 150 B extending into the patient's heel. Rather, the kickstand member 114 can include a portion 160 that can allow the member 114 to clear or avoid the bone pins 150 A, 150 B as the member 114 is rotated behind the heel.
  • the system 100 can include the bone pin clamping assembly 108 , which is shown and described in more detail below with respect to FIGS. 4, 5A, 5B, and 6 .
  • the bone pin clamping assembly 108 can provide a polyaxially rotating clamp, thereby providing increased range of motion and degrees of freedom over existing clamp design.
  • the increased range of motion and degrees of freedom provided by the bone pin clamping assembly 108 of this disclosure can eliminate the need for a spanning member that extends across a patient's foot, such as the spanning member 808 in FIG. 12 in commonly assigned U.S. patent application Ser. No. 13/961,729, titled “External Fixation”, to Myers et al. and filed on Aug. 7, 2013, the entire content of which is incorporated herein by reference.
  • the spanning member can obstruct a physician's view and can also interfere with the healing process, e.g., as the foot swells.
  • FIG. 2 is a side view of the external fixation system of FIG. 1 , in accordance with this disclosure. For purposes of conciseness, FIG. 2 will not be described separately.
  • FIG. 3 is a side view of the external fixation system of FIGS. 1 and 2 , in accordance with this disclosure. For purposes of conciseness, FIG. 3 will not be described separately. It should be noted that the clamping assembly 108 of FIGS. 1-3 is optional.
  • FIG. 4 is an exploded view of the clamping assembly 108 of the external fixation system of FIGS. 1-3 .
  • the clamping assembly 108 can include a longitudinal member 162 having a first end 164 and a second end 166 . As seen in FIG. 4 , the second end 166 of the longitudinal member 162 can define a first clamp 168 .
  • the clamping assembly 108 can include a second clamp 170 configured to attach to the first end 164 of the longitudinal member 162 and connect to a rod assembly, e.g., rod assembly 106 of FIG. 1 .
  • the second clamp can be a U-shaped clamp.
  • the second clamp 170 can be configured to frictionally engage a rod assembly, e.g., rod assembly 106 of FIG. 1 .
  • the clamping assembly 108 can include a first fixation bolt 172 configured to extend through the first end 164 of the longitudinal member 162 and at least a portion of the second clamp 170 .
  • the first fixation bolt 172 can be secured using a nut 174 , for example. When tightened, the first fixation bolt 172 can pull the sides of the second clamp 170 together, thereby securing the clamp 170 to the rod assembly 106 .
  • the clamping assembly 108 can include a bone pin clamping member 176 including a first end 178 , a second end 180 defining a spherical portion, and at least a third clamp 182 .
  • the third clamp 182 can be configured to receive a first bone pin, e.g., a metatarsal bone pin.
  • the example configuration shown in FIG. 4 can include a fourth clamp 184 configured to receive a second bone pin, e.g., a metatarsal bone pin.
  • the first clamp 168 of the longitudinal member 162 can include a spherical clamping surface 188 configured to receive the spherical portion of the second end 180 of the clamping member 176 .
  • the spherical clamping surface 188 can include an inner surface configured to substantially conform to an outer surface of the spherical portion.
  • a spherical portion can include, for example, a sphere or a truncated sphere (e.g., a sphere in which two opposing portions are truncated by parallel planes), where at least some of the spherical portion retains a spherical shape.
  • the spherical portion of the second end 180 of the clamping member 176 in combination with the first clamp 168 can provide a polyaxial joint between the longitudinal member 162 and the clamping member 176 .
  • the clamping member 176 and, in particular, the spherical portion 190 can be secured to the longitudinal member 162 using a second fixation bolt 192 .
  • the second fixation bolt 192 can extend through a portion of the clamping member 176 .
  • the second fixation bolt 192 can extend into the spherical portion 190 , which is configured to receive a first nut 194 .
  • the nut 194 is drawn into the spherical portion 190 , causing the spherical portion 190 to expand against the inner surface of the first clamp 168 .
  • the nut 194 can include tapered sides.
  • the assembly 108 can include a second nut 196 to secure the fixation bolt 192 .
  • the spherical portion 190 can define one or more slots 198 , which can facilitate the expansion of the spherical portion 190 .
  • the clamping assembly 108 can also include a first bone pin locking member 200 A.
  • the clamping assembly 108 can include a second bone pin locking member 200 B.
  • the first and the second bone pin locking members 200 A, 200 B are collectively referred to as “bone pin locking members 200 ” in this disclosure.
  • the bone pin locking members 200 can be configured to receive respective bone pins, e.g., metatarsal bone pins (depicted in FIGS. 5A, 5B ).
  • the bone pin locking members 200 can include a spherical portion.
  • the third clamp 182 can include a spherical clamping surface 202 configured to receive a spherical portion 204 of the first bone pin locking member 200 A and form a polyaxial joint between the clamping member 176 and a first bone pin.
  • the spherical portion 204 of the first bone pin locking member 200 A can be configured to compress when the third clamp 182 contracts.
  • the fourth clamp 184 can include a spherical clamping surface 206 configured to receive a spherical portion 208 of the second bone pin locking member 200 B and form a polyaxial joint between the clamping member 176 and a second bone pin.
  • the spherical portion 208 of the second bone pin locking member 200 B can be configured to compress when the fourth clamp 184 contracts.
  • the clamping member 176 can define a first gap 210 and a second gap 212 .
  • the first gap 210 closes and the third clamp 182 contracts against the spherical portion 204 of the first bone pin locking member 200 A.
  • a fourth clamp as shown in FIG.
  • the spherical portion of the bone pin locking members 200 can define one or more slots 214 , which can facilitate the contraction of the spherical portion of the bone pin locking members 200 .
  • FIGS. 5A and 5B depict perspective views of the clamping assembly 108 of FIG. 1 .
  • FIGS. 5A and 5B will be described together.
  • the assembled clamping assembly 108 shown in FIGS. 5A and 5B depicts the first bone pin locking member 200 A and the second bone pin locking member 200 B securing, respectively, a first bone 216 A and a second bone pin 216 B (collectively referred to as bone pins 216 in this disclosure), within the third clamp 182 and the fourth clamp 184 .
  • the third clamp 182 can include a spherical clamping surface configured to receive a spherical portion of the first bone pin locking member 200 A and form a polyaxial joint 218 A between the clamping member 176 and the first bone pin 200 A
  • the fourth clamp 184 can include a spherical clamping surface configured to receive a spherical portion of the second bone pin locking member 200 B and form a polyaxial joint 218 B between the clamping member and a second bone pin 216 B.
  • the multiple polyaxial joints, e.g., joint 218 A, joint 218 B, and joint 220 best shown FIG. 5B , of the clamping assembly 108 can advantageously allow a physician, for example, to secure the first bone pin 216 A and the second bone pin 216 B into a patient's foot, e.g., a metatarsal, and then attach the clamping assembly 108 , if desired.
  • the physician can select an optimum placement of the bone pins because the clamping assembly 108 can be easily secured to the bone pins 216 , regardless of their orientation, after the bone pins 216 are secured.
  • the physician is not limited by the clamping assembly 108 when selecting locations for bone pin placement.
  • the physician can attach the second clamp 170 of the clamping assembly 108 to a rod assembly, e.g., rod assembly 106 of FIG. 1 ), adjust the clamping member 176 (via the polyaxial joint 220 ) to align the clamping member 176 with the bone pins 216 , insert the bone pins 216 into respective bone pin locking members 200 , and then tighten the fixation bolt 192 to secure the bone pins 216 within the third clamp 182 and the fourth clamp 184 .
  • the physician can first attach the clamping assembly 108 and then secure the bone pins 216 to the bone(s).
  • An example method of external fixation of a limb can include securing a first bone pin to the first bone portion, e.g., a portion of a tibia 222 of FIG. 1 . Then, a pre-assembled external fixation system, including a rod assembly, can be attached to the first bone pin, e.g., bone pin 118 A of the external fixation system 100 of FIG. 1 . The physician can secure a second bone pin to a bone in a foot, e.g., bone pin 216 A of FIGS. 5A, 5B . The physician can attach a clamping assembly to the rod assembly, e.g., the clamping assembly 108 of FIGS. 5A, 5B .
  • the second bone pin 216 A can be attached to the bone pin locking member 200 A of the clamping assembly, and then the clamping assembly can be secured, e.g., the clamps tightened to prevent further adjustment or movement.
  • FIG. 6 is a cross-sectional view of the clamping assembly 108 of FIG. 1 .
  • the second end 180 of the clamping member 176 defines a spherical portion that is configured to receive the nut 194 .
  • the spherical portion 190 configured to receive the nut 194 defines a tapered aperture 224 .
  • the tapered aperture 224 can taper from a first dimension at an outer portion to a second dimension toward a center of the spherical portion, where the first dimension is larger than the second dimension.
  • the nut 194 is pulled inward toward the center of the spherical portion 190 .
  • the sides of the nut 194 can be tapered to correspond to the tapered aperture 224 .
  • the nut 194 causes the spherical portion 190 to expand outwardly against the first clamp 168 of the longitudinal member 162 .
  • FIG. 7 depicts an example of a clamping strut assembly, e.g., the first clamping strut assembly 110 of FIG. 1 .
  • the clamping strut assembly 110 can include a body 154 having a first clamp 144 configured to receive an end of a rod assembly, e.g., a rod assembly 104 of FIG. 1 .
  • a first fixation bolt 146 can extend through an end of the body 154 . When turned, the first fixation bolt 146 can close a gap 226 and tighten the first clamp 144 , thereby securingly engaging an end of the rod assembly.
  • the clamping strut assembly 110 can further include a second clamp 148 having a plate 152 , a second fixation bolt 228 , and a nut 230 to receive the bolt 228 .
  • the clamp 148 is configured to securingly engage one or more bone pins e.g., bone pins 150 A, 150 B of FIG. 1 .
  • the bone pins 150 A and 150 B can be calcaneal pins.
  • the body 154 can define grooves 232 A to receive each of the bone pins 150 .
  • the plate 152 can define similar grooves 232 B.
  • the system 100 of FIG. 1 can include a kickstand member 114 (shown in FIG. 1 ).
  • the body 154 of the clamping strut assembly 110 can include a protrusion 234 configured to mate with a corresponding recess or cavity defined by an end of the kickstand member 114 .
  • a fixation bolt 156 (shown in FIG. 1 ) can extend through the end of the kickstand member 114 and through the protrusion 234 of the clamping strut assembly 110 .
  • the second clamp 148 of the clamping strut assembly 110 can be elevated.
  • the body 154 can include a portion 236 , e.g., a sloped portion, that can position the second clamp 148 above the rest of body 154 .
  • the raised position of the clamp 148 can allow the bone pins 150 to be positioned such that when the kickstand member 114 is rotated behind the patient's heel, the bone pins 150 are above the kickstand member 114 and will not interfere with its movement.
  • Example 1 includes subject matter (such as a system, apparatus, assembly) comprising: a longitudinal member having a first end and a second end, the second end defining a first clamp; a second clamp configured to attach to the first end of the longitudinal member and connect to a rod assembly; a clamping member including a first end, a second end defining a spherical portion, and a third clamp, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member.
  • subject matter such as a system, apparatus, assembly
  • a longitudinal member having a first end and a second end, the second end defining a first clamp
  • a second clamp configured to attach to the first end of the longitudinal member and connect to a rod assembly
  • a clamping member including a first end, a second end defining a spherical portion, and a third clamp, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member.
  • Example 2 the subject matter of Example 1 can optionally include, wherein the first clamp includes a spherical clamping surface, the spherical clamping surface configured to receive the spherical portion and form a polyaxial joint between the clamping member and the longitudinal member.
  • the first clamp includes a spherical clamping surface, the spherical clamping surface configured to receive the spherical portion and form a polyaxial joint between the clamping member and the longitudinal member.
  • Example 3 the subject matter of one or more of Examples 1 and 2 can optionally include, wherein the spherical portion is configured to expand.
  • Example 4 the subject matter of one or more of Examples 1-3 can optionally include, a first fixation bolt extending through a portion of the clamping member and the spherical portion; and a nut configured to receive an end of the first fixation bolt, wherein the spherical portion is configured to receive the nut, and wherein the spherical portion is configured to expand when the first fixation bolt is turned and the nut is pulled into the spherical portion.
  • Example 5 the subject matter of Example 4 can optionally include, wherein the nut is tapered, and wherein the spherical portion configured to receive the nut defines a tapered aperture that tapers from a first dimension at an outer portion to a second dimension toward a center of the spherical portion, the first dimension larger than the second dimension.
  • Example 6 the subject matter of one or more of Examples 1-5 can optionally include, wherein the third clamp is configured to contract when the first fixation bolt is turned and the nut is pulled into the spherical portion.
  • Example 7 the subject matter of one or more of Examples 1-6 can optionally include, a first bone pin locking member including a spherical portion, wherein the third clamp includes a spherical clamping surface configured to receive the spherical portion of the first bone pin locking member and form a polyaxial joint between the clamping member and a first bone pin.
  • Example 8 the subject matter of Example 7 can optionally include, wherein the spherical portion of the first bone pin locking member defines at least one slot.
  • Example 9 the subject matter of Example 8 can optionally include, wherein the spherical portion of the first bone pin locking member is configured to compress when the third clamp contracts.
  • Example 10 the subject matter of one or more of Examples 1-9 can optionally include: a second fixation bolt configured to extend through the first end of the longitudinal member and at least a portion of the second clamp, wherein the second clamp includes a U-shaped clamp.
  • Example 11 the subject matter of one or more of Examples 1-10 can optionally include, wherein the clamping member further includes a fourth clamp, wherein the fourth clamp is configured to contract when the first fixation bolt is turned and the nut is pulled into the spherical portion, the clamping assembly comprising: a second bone pin locking member including a spherical portion, wherein the fourth clamp includes a spherical clamping surface, the spherical clamping surface of the fourth clamp configured to receive the spherical portion of the second bone pin locking member and form a polyaxial joint between the clamping member and a second bone pin.
  • the clamping member further includes a fourth clamp, wherein the fourth clamp is configured to contract when the first fixation bolt is turned and the nut is pulled into the spherical portion
  • the clamping assembly comprising: a second bone pin locking member including a spherical portion, wherein the fourth clamp includes a spherical clamping surface, the spherical clamping surface of the fourth clamp configured
  • Example 12 the subject matter of one or more of Examples 1-11 can optionally include, the first bone pin and the second bone pin.
  • Example 13 the subject matter of one or more of Examples 1-12 can optionally include, the rod assembly, the rod assembly configured to secure to and extend between a first external clamp assembly and a second external clamp assembly, the rod assembly including a first tubular member and a second tubular member received in the first tubular member, wherein the second clamp configured to attach to the first end of the longitudinal member and connect to a rod assembly is configured to connect to one of the first tubular member and the second tubular member.
  • Example 14 includes subject matter (such as a system, apparatus, assembly) comprising a longitudinal member having a first end and a second end, the second end defining a first clamp, the first clamp including a spherical clamping surface; a U-shaped clamp configured to attach to the first end of the longitudinal member and connect to a rod assembly; a clamping member including a first end, a second end defining a spherical portion configured to expand, and a third clamp; a first fixation bolt extending through a portion of the clamping member and the spherical portion; a nut configured to receive an end of the first fixation bolt; and a first bone pin locking member including a spherical portion, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member, wherein the spherical clamping surface of the first clamp is configured to receive the spherical portion and form a polyaxial joint between the clamping member and the longitudinal member, wherein the spherical portion is configured
  • Example 15 includes subject matter (such as a system, apparatus, assembly) comprising a first clamp assembly; a second clamp assembly; a rod assembly secured to and extending between the first clamp assembly and the second clamp assembly, the first rod assembly including a first tubular member and a second tubular member received in the first tubular member; and a bone pin clamping assembly comprising: a longitudinal member having a first end and a second end, the second end defining a first clamp; a second clamp configured to attach to the first end of the longitudinal member and connect to the rod assembly; a clamping member including a first end, a second end defining a spherical portion, and a third clamp, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member.
  • Example 16 the subject matter of Example 15 can optionally include, wherein the first clamp includes a spherical clamping surface, the spherical clamping surface configured to receive the spherical portion and form a polyaxial joint between the clamping member and the longitudinal member.
  • Example 17 the subject matter of one or more of Examples 15-16 can optionally include, wherein the spherical portion is configured to expand.
  • Example 18 the subject matter of one or more of Examples 15-17, can optionally include a first fixation bolt extending through a portion of the clamping member and the spherical portion; and a nut configured to receive an end of the first fixation bolt, wherein the spherical portion is configured to receive the nut, and wherein the spherical portion is configured to expand when the first fixation bolt is turned and the nut is pulled into the spherical portion.
  • Example 19 the subject matter of Example 18 can optionally include, wherein the nut is tapered, and wherein the spherical portion configured to receive the nut defines a tapered aperture that tapers from a first dimension at an outer portion to a second dimension toward a center of the spherical portion, the first dimension larger than the second dimension.
  • Example 20 the subject matter of one or more of Examples 15-19 can optionally include, wherein the third clamp is configured to contract when the first fixation bolt is turned and the nut is pulled into the spherical portion.
  • Example 20 can include subject matter (such as a method) for external fixation of a limb, the limb having a first bone portion, the method comprising: securing a first bone pin to the first bone portion; attaching a pre-assembled external fixation system to the first bone pin, the external fixation system comprising a rod assembly; securing a second bone pin to a bone in a foot; attaching a clamping assembly to the rod assembly, the clamping assembly comprising: a longitudinal member having a first end and a second end, the second end defining a first clamp; a second clamp configured to attach to the first end of the longitudinal member and connect to the rod assembly; a clamping member including a first end, a second end defining a spherical portion, a bone pin locking member, and a third clamp configured to receive the bone pin locking member, wherein the first clamp of the longitudinal member is configured to receive the second end of the clamping member; aligning the bone pin locking member of the clamping assembly with the second bone pin; inserting
  • the terms “a” or “an” are used, as is common in patent documents, to include one or more than one, independent of any other instances or usages of “at least one” or “one or more.”
  • the term “or” is used to refer to a nonexclusive or, such that “A or B” includes “A but not B,” “B but not A,” and “A and B,” unless otherwise indicated.
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US10441317B2 (en) * 2016-10-26 2019-10-15 SIGN Fracture Care International Bone fixation system and method using a clamping instrument to guide fastener placement
CN108670383A (zh) * 2018-05-30 2018-10-19 北京工业大学 一种多功能组合式外固定器装置
WO2020109502A1 (fr) 2018-11-28 2020-06-04 Aesculap Ag Système de fixation et dispositif d'orientation
WO2020109499A1 (fr) 2018-11-28 2020-06-04 Aesculap Ag Pince de blocage et dispositif d'orientation
DE102018130119A1 (de) 2018-11-28 2020-05-28 Aesculap Ag Fixierungssystem und Ausrichtungsvorrichtung
DE102018130117A1 (de) 2018-11-28 2020-05-28 Aesculap Ag Fixierungsklammer und Ausrichtungsvorrichtung
US11497509B2 (en) 2018-11-28 2022-11-15 Aesculap Ag Fixing clamp and aligning device
US11751883B2 (en) 2018-11-28 2023-09-12 Aesculap Ag Fixing system and aligning device
US11737786B2 (en) 2019-12-31 2023-08-29 Orthopediatrics Corp. Multiple track system for positioning of bone segments

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EP3310280A2 (fr) 2018-04-25
US11134988B2 (en) 2021-10-05
WO2016205128A2 (fr) 2016-12-22
WO2016205128A3 (fr) 2017-03-30
US20200038062A1 (en) 2020-02-06

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