EP0676944B1 - Leg movement rail - Google Patents

Leg movement rail Download PDF

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Publication number
EP0676944B1
EP0676944B1 EP93902140A EP93902140A EP0676944B1 EP 0676944 B1 EP0676944 B1 EP 0676944B1 EP 93902140 A EP93902140 A EP 93902140A EP 93902140 A EP93902140 A EP 93902140A EP 0676944 B1 EP0676944 B1 EP 0676944B1
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EP
European Patent Office
Prior art keywords
rod
leg
rail
base
mobility
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.)
Expired - Lifetime
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EP93902140A
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German (de)
French (fr)
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EP0676944A1 (en
Inventor
Walter Blauth
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Medireha GmbH
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Medireha GmbH
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Publication date
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Priority to AT93902140T priority Critical patent/ATE149338T1/en
Publication of EP0676944A1 publication Critical patent/EP0676944A1/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00Apparatus for passive exercising; Vibrating apparatus; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A61H1/02Stretching or bending or torsioning apparatus for exercising
    • A61H1/0237Stretching or bending or torsioning apparatus for exercising for the lower limbs
    • A61H1/0255Both knee and hip of a patient, e.g. in supine or sitting position, the feet being moved together in a plane substantially parallel to the body-symmetrical plane
    • A61H1/0259Both knee and hip of a patient, e.g. in supine or sitting position, the feet being moved together in a plane substantially parallel to the body-symmetrical plane moved by translation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00Apparatus for passive exercising; Vibrating apparatus; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A61H1/02Stretching or bending or torsioning apparatus for exercising
    • A61H1/0237Stretching or bending or torsioning apparatus for exercising for the lower limbs
    • A61H1/0255Both knee and hip of a patient, e.g. in supine or sitting position, the feet being moved together in a plane substantially parallel to the body-symmetrical plane
    • A61H1/0262Walking movement; Appliances for aiding disabled persons to walk
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/16Physical interface with patient
    • A61H2201/1602Physical interface with patient kind of interface, e.g. head rest, knee support or lumbar support
    • A61H2201/164Feet or leg, e.g. pedal
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61HPHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/16Physical interface with patient
    • A61H2201/1657Movement of interface, i.e. force application means
    • A61H2201/1676Pivoting

Definitions

  • the invention relates to a leg movement rail, according to the preamble of claim 1.
  • Leg movement splints are widely used in the, especially passive, movement of newly operated hip or knee joints. This procedure stimulates and shortens the healing process and accelerates the recovery of traumatized joints.
  • the invention seeks to remedy this.
  • the invention has for its object to provide a leg movement rail whose joint mechanism imitates the anatomical trajectory of the knee joint about the axis of rotation of the hip joint in any position.
  • Another object is to create a leg movement splint in which the center axis of the thigh support is always directed towards the patient's hip pivot point during the entire movement sequence.
  • the invention solves the problem with a leg movement rail, which has the features of claim 1.
  • leg movement splint according to the invention, a force-free movement sequence between the leg movement splint and the leg to be treated is ensured and there is the possibility of individually adapting the height of the support means for the lower leg and thigh to the leg .
  • a modification of the leg movement splint, for the anatomically correct therapy of the left or right leg is unnecessary. Only the length ratios on the femur and tibia need to be adjusted.
  • FIG. 1 and 2 show the leg movement splint in its essential parts, in which the patient's leg (not shown in the drawing) is positioned so that the physiological axes of rotation of the stationary hip joint 12 'and of the knee joint shifting on the trajectory 13' with the corresponding axes of rotation 12 and 13 of the leg movement rail come as well as possible.
  • two parallel sets of rods 2, 3, 2, 3 'and joint mechanisms 10, 10' are arranged on a base 1 and connected to one another by means of supports such that the patient's leg is accommodated between them.
  • the tibial length is adjusted by shifting the footrest 11 in the direction of the double arrow 15 along the rods 3; 3 'running on both sides of the lower leg.
  • the support means 8 for the lower leg are adjustable in height, so that the tibia of the patient can be positioned essentially in the plane formed by the two parallel rods 3, 3 '.
  • the length of the femur can be adjusted by means of the femoral extension 23 (by lengthening or shortening the rods 2; 2 'running on both sides of the femur in the direction of the double arrow 16).
  • the adjustability of the femoral extension 23 can, for example, by means of a "rod in tube", i.e. telescopic system can be realized, which can be locked by means of an eccentric lever lock.
  • Mechanical limit stops are advantageously provided for the adjustable limit positions.
  • the support means 9 for the thigh which are arranged between the two rods 5,5 'running on both sides of the femur, are also height-adjustable, so that the patient's femur can be positioned essentially in the plane formed by the two parallel rods 5,5' .
  • the thigh-side rod 2 with the femoral extension 23 is fastened at one end 21 to the base 1 by means of a swivel joint 22.
  • the lower leg-side, L-shaped rod 3 is fastened to the base 1 with its shorter leg 31, which serves as a foot strut, by means of a swivel joint 32 arranged longitudinally displaceably in a guide 34 along the base 1.
  • a joint mechanism 10 in the form of a pentagonal joint with four joints 71, 72, 73, 74 connects the other end 28 of the rod 2 to the longer leg 33 of the rod (FIG. 3).
  • Fig. 3 shows the leg movement rail in a state of movement, as it results after displacement of the swivel joint 32 by 198 mm in the direction of arrow 17 to the right.
  • the longer leg 33 of the rod 3 has risen upwards relative to the position in FIG. 1 and moved backwards, so that the swivel joint 72 exactly imitates the movement of the anatomical knee joint.
  • the articulated mechanism 10 which is described in detail below with reference to FIG. 4, allows yet another control of the movement sequence, which consists in the fact that the extension of the rods 5, 5 'towards the base 1 at every position of the articulated polygon 7 with respect to the axis of rotation of the hip joint 12 is directed.
  • the fourth swivel joints 71, 72, 73, 74 and a fixed point 75 consists essentially of a pentagon with 5 sides of the length L1, L2, L3, L4 and L5, 4 swivel joints 71, 72, 73, 74 and a fixed point 75.
  • the first side of the joint polygon 7 of length L1 is formed by the other end 28 of the rod 2.
  • the third side of the polygon 7 of length L3 is formed by the end of the longer leg 33 of the rod 3.
  • the second side of the polygon 7 of length L2 is formed by a rod 4, which at one end 75 at a distance L3 from the end of the longer leg 33 of the rod 3 is connected to the latter and is attached at its other end 42 by means of the swivel joint 71 to the other end 28 of the rod 2.
  • the fourth side of the polygon 7 of length L4 is formed by the rod 5 serving as a thigh support, which is connected at one end 51 via a swivel joint 72 to the end of the longer leg 33 of the rod 3.
  • the fifth side of the articulated polygon 7 of length L5 is finally formed by a rod 6, which is fastened to its end 61 by means of a swivel 74 at a distance L1 from the other end 28 of the rod 2 and with its other end 62 by means of a Swivel 73 is attached to the rod 5 serving as a thigh support at a distance L4 from the swivel 72.
  • FIG. 6 shows the change in position of the two bolts 63, 64 within the groove 52, as results from the position of the joint mechanism 10 shown in FIG. 3.
  • the bolt 64 sliding in the direction of the double arrow 18 is opposite the end position shown in FIG. 5) to the swivel joint 72, while at the same time the bolt 63 sliding in the direction of the double arrow 19 has been displaced toward the base 1.
  • FIG. 7 shows the movement sequence of the leg movement splint according to the invention in a patient who is 1.90 m tall and in FIG. 8 in a patient who is only 1.35 m tall. 7 and 8 each show 4 successive intermediate positions of the rotary joints 32 and 71 between the two extreme positions, i.e. 6 positions in total.
  • the swivel joint 32 is shifted from its left extreme position 32a to the right through the horizontal positions shown by the horizontal stroke length of 619 mm to the right extreme position 32f.
  • the swivel joint 71 of the joint mechanism 10 moves from position 71a to 71f, so that the leg movement rail describes a path curve 13 around the virtual hip pivot point 12, which largely corresponds to the idealized body's own path curve of the knee joint 13 'around the patient's hip pivot points 12' .
  • the swivel joint 32 is moved from its left extreme position 32a to the right through the illustrated intermediate positions by 477 mm to the right extreme position 32f postponed.
  • the shortened stroke length of the leg movement rail compared to FIG. 7 reflects the shortened body length of 1.35 m present here.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

The leg movement rail is used for the repetitive, especially passive, movement of the knee and hip joints in orthopaedics. It consists essentially of a base (1), a thigh-side rod (2) which is secured at one end (21) by means of a rotary joint (22) to the base (1), a shin-side L-shaped rod (3), the shorter shank (31) of which is secured to the base (1) by a rotary joint (32) arranged to tbe movable along the base (1) and an articulated mechanism (10) connecting the other end (22) of the rod and the longer shank (33) of the rod (3). The articulated mechanism (10) consists of a jointed polygon (7) which, during a to and fro movement of the shorter shank (31) of the rod (3) secured to rotate on the base (1), generates a curved path (13) around the virtual axis of rotation (12) of the hip which corresponds to the idealised, curved path (13') of the knee joint of the body concerned about the axis of rotation (12') of the patient's hip. A further advantage of the leg movement rail lies in the fact that there is no need for any technical right/left conversion for the other limb.

Description

Die Erfindung bezieht sich auf eine Beinbewegungsschiene, gemäss der Gattung des Patentanspruchs 1.The invention relates to a leg movement rail, according to the preamble of claim 1.

Beinbewegungsschienen finden breite Anwendung bei der, insbesondere passiven Bewegung frisch operierter Hüft- oder Knie-Gelenke. Dieses Verfahren stimuliert und verkürzt den Heilungsprozess und beschleunigt die Wiederherstellung traumatisierter Gelenke.Leg movement splints are widely used in the, especially passive, movement of newly operated hip or knee joints. This procedure stimulates and shortens the healing process and accelerates the recovery of traumatized joints.

Aus der DE-A1 36 38 094 ist bereits eine Beinbewegungsschienen bekannt, deren Drehachsen mit den physiologischen Drehachsen des Hüft-,Knie- und Fuss-Gelenkes übereinstimmen sollen. Der dazu vorgeschlagenen Gelenkmechanismus kann aber nicht verhindern, dass im Bewegungsablauf der Beinbewegungsschiene die anatomische Bahnkurve des Kniegelenkes von der Drehachse des Hüftgelenkes abweicht und es deshalb zu Relativbewegungen zwischen dem Oberschenkel und der entsprechenden Auflagefläche der Beinbewegungsschiene kommt.From DE-A1 36 38 094 a leg movement splints are already known, the axes of rotation of which should correspond to the physiological axes of rotation of the hip, knee and foot joint. However, the joint mechanism proposed for this purpose cannot prevent the anatomical trajectory of the knee joint from deviating from the axis of rotation of the hip joint in the course of movement of the leg movement rail and therefore leading to relative movements between the thigh and the corresponding contact surface of the leg movement rail.

In der Fachwelt sind auch motorisierte Knieübungsmaschinen zur Diskussion gestellt worden, welche eine bessere Übereinstimmung zwischen dem anatomischen und dem apparativen Bewegungsablauf herbeiführen sollten, ohne jedoch dieses Ziel wirklich zu erreichen und mit dem zusätzlichen Nachteil, dass ein Rechts-/Links-Umbau der Vorrichtung notwendig wurde.In the professional world, motorized knee exercise machines have been brought up for discussion, which have a better correspondence between the anatomical and the apparatusic movement sequence should bring about, but without really achieving this goal and with the additional disadvantage that a right / left conversion of the device was necessary.

Hier will die Erfindung Abhilfe schaffen. Der Erfindung liegt die Aufgabe zugrunde eine Beinbewegungsschiene zu schaffen deren Gelenkmechanismus in jeder Stellung die anatomische Bahnkurve des Kniegelenkes um die Drehachse des Hüftgelenkes imitiert. Eine weitere Aufgabe besteht darin, eine Beinbewegungsschiene zu schaffen, bei welcher die Zentrumsachse der Oberschenkelauflage während des gesamten Bewegungsablaufes immer zum Hüftdrehpunkt des Patienten gerichtet ist.The invention seeks to remedy this. The invention has for its object to provide a leg movement rail whose joint mechanism imitates the anatomical trajectory of the knee joint about the axis of rotation of the hip joint in any position. Another object is to create a leg movement splint in which the center axis of the thigh support is always directed towards the patient's hip pivot point during the entire movement sequence.

Die Erfindung löst die gestellte Aufgabe mit einer Beinbewegungsschiene, welche die Merkmale des Anspruchs 1 aufweist.The invention solves the problem with a leg movement rail, which has the features of claim 1.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the dependent claims.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass dank der erfindungsgemässen Beinbewegungsschiene ein kräftefreier Bewegungsablauf zwischen Beinbewegungsschiene und dem zu behandelnden Bein gewährleistet wird und die Möglichkeit besteht die Auflagemittel für den Unter- und den Oberschenkel einzeln in der Höhe dem Bein anzupassen. Ein Umbau der Beinbewegungsschiene, zur anatomisch korrekten Therapie des linken oder rechten Beines erübrigt sich damit. Lediglich eine Einstellung der Längenverhältnisse an Femur und Tibia ist noch erforderlich.The advantages achieved by the invention are essentially to be seen in the fact that, thanks to the leg movement splint according to the invention, a force-free movement sequence between the leg movement splint and the leg to be treated is ensured and there is the possibility of individually adapting the height of the support means for the lower leg and thigh to the leg . A modification of the leg movement splint, for the anatomically correct therapy of the left or right leg is unnecessary. Only the length ratios on the femur and tibia need to be adjusted.

Die Erfindung und Weiterbildungen der Erfindung werden im folgenden anhand der teilweise schematischen Darstellungen eines Ausführungsbeispieles noch näher erläutert.The invention and further developments of the invention are explained in more detail below on the basis of the partially schematic representations of an exemplary embodiment.

Es zeigen:

  • Fig. 1 eine Seitenansicht der erfindungsgemässen Beinbewegungsschiene in der voll ausgestreckten Position;
  • Fig. 2 eine Aufsicht auf die erfindungsgemässen Beinbewegungsschiene nach Fig. 1;
  • Fig. 3 eine Seitenansicht der erfindungsgemässen Beinbewegungsschiene in einer gebeugten Position;
  • Fig. 4 eine schematische Darstellung des Gelenkmechanismus der erfindungsgemässen Beinbewegungsschiene;
  • Fig. 5 eine vergrösserte Darstellung des Gelenkmechanismus der erfindungsgemässen Beinbewegungsschiene nach Fig. 1;
  • Fig. 6 eine vergrösserte Darstellung des Gelenkmechanismus der erfindungsgemässen Beinbewegungsschiene nach Fig. 3.
  • Fig. 7 eine schematische Darstellung des Bewegungsablaufs der erfindungsgemässen Beinbewegungsschiene an einem Patienten der Körpergrösse 1,90 m; und
  • Fig. 8 eine schematische Darstellung des Bewegungsablaufs der erfindungsgemässen Beinbewegungsschiene an einem Patienten der Körpergrösse 1,35 m.
Show it:
  • Figure 1 is a side view of the leg movement rail according to the invention in the fully extended position.
  • FIG. 2 shows a top view of the leg movement splint according to the invention according to FIG. 1;
  • 3 shows a side view of the leg movement splint according to the invention in a bent position;
  • 4 shows a schematic illustration of the joint mechanism of the leg movement splint according to the invention;
  • 5 shows an enlarged illustration of the joint mechanism of the leg movement splint according to the invention according to FIG. 1;
  • 6 is an enlarged view of the joint mechanism of the leg movement splint according to the invention according to FIG. 3.
  • 7 shows a schematic representation of the movement sequence of the leg movement splint according to the invention on a patient with a body size of 1.90 m; and
  • 8 shows a schematic representation of the movement sequence of the leg movement splint according to the invention on a patient of 1.35 m tall.

Die Fig. 1 und 2 zeigen die Beinbewegungsschiene in ihren wesentlichen Teilen, in welcher das (zeichnerisch nicht dargestellte) Bein des Patienten so gelagert wird, dass die physiologischen Drehachsen des stationären Hüftgelenkes 12' und des sich auf der Bahnkurve 13' verschiebenden Kniegelenkes mit den entsprechenden Drehachsen 12 und 13 der Beinbewegungsschiene möglichst gut zur Übereinstimmung kommen. Wie aus Fig. 2 ersichtlich sind zu diesem Zweck zwei parallele Sätze von Stangen 2,3;2'3' und Gelenkmechanismen 10;10' auf einer Basis 1 derart angeordnet und mit Auflagemitteln untereinander verbunden, dass das Bein des Patienten dazwischen Aufnahme findet.1 and 2 show the leg movement splint in its essential parts, in which the patient's leg (not shown in the drawing) is positioned so that the physiological axes of rotation of the stationary hip joint 12 'and of the knee joint shifting on the trajectory 13' with the corresponding axes of rotation 12 and 13 of the leg movement rail come as well as possible. For this purpose, as can be seen from FIG. 2, two parallel sets of rods 2, 3, 2, 3 'and joint mechanisms 10, 10' are arranged on a base 1 and connected to one another by means of supports such that the patient's leg is accommodated between them.

Die Tibialänge wird durch eine Verschiebung der Fussauflage 11 in Richtung des Doppelpfeils 15 längs der beidseitige des Unterschenkels verlaufenden Stangen 3;3' eingestellt. Die Auflagemittel 8 für den Unterschenkel sind höhenverstellbar, so dass die Tibia des Patienten im wesentlichen in der von den zwei parallelen Stangen 3,3' gebildeten Ebene positionierbar ist.The tibial length is adjusted by shifting the footrest 11 in the direction of the double arrow 15 along the rods 3; 3 'running on both sides of the lower leg. The support means 8 for the lower leg are adjustable in height, so that the tibia of the patient can be positioned essentially in the plane formed by the two parallel rods 3, 3 '.

Die Femurlänge kann mittels des Femurauszugs 23 (durch Verlängerung, bzw. Verkürzung der beidseitig des Femur verlaufenden Stangen 2;2' in Richtung des Doppelpfeils 16), eingestellt werden. Die Verstellbarkeit des Femurauszugs 23 kann beispielsweise mittels eines "Stab in Rohr", d.h. teleskopierenden Systems realisiert werden, welches formschlüssig mittels eines Exzenterhebelverschluss arretierbar ist. Für die einstellbaren Grenzpositionen sind vorteilhafterweise mechanische Endanschläge vorzusehen.The length of the femur can be adjusted by means of the femoral extension 23 (by lengthening or shortening the rods 2; 2 'running on both sides of the femur in the direction of the double arrow 16). The adjustability of the femoral extension 23 can, for example, by means of a "rod in tube", i.e. telescopic system can be realized, which can be locked by means of an eccentric lever lock. Mechanical limit stops are advantageously provided for the adjustable limit positions.

Die Auflagemittel 9 für den Oberschenkel, welche zwischen den beiden beidseitig des Femur verlaufenden Stangen 5,5' angeordnet sind, sind ebenfalls höhenverstellbar, so dass der Femur des Patienten im wesentlichen in der von den zwei parallelen Stangen 5,5' gebildeten Ebene positionierbar ist.The support means 9 for the thigh, which are arranged between the two rods 5,5 'running on both sides of the femur, are also height-adjustable, so that the patient's femur can be positioned essentially in the plane formed by the two parallel rods 5,5' .

Die oberschenkelseitige Stange 2 mit dem Femurauszug 23 ist an ihrem einen Ende 21 mittels eines Drehgelenkes 22 an der Basis 1 befestigt. Die unterschenkelseitige, L-förmige Stange 3 ist mit ihrem kürzeren Schenkel 31, der als Fussstrebe dient, mittels eines längs der Basis 1 in einer Führung 34 längsverschieblich angeordneten Drehgelenkes 32 an der Basis 1 befestigt. Ein Gelenkmechanismus 10 in Form eines Gelenkfünfecks mit vier Gelenken 71,72,73,74 verbindet das andere Ende 28 der Stange 2 mit dem längeren Schenkel 33 der Stange (3).The thigh-side rod 2 with the femoral extension 23 is fastened at one end 21 to the base 1 by means of a swivel joint 22. The lower leg-side, L-shaped rod 3 is fastened to the base 1 with its shorter leg 31, which serves as a foot strut, by means of a swivel joint 32 arranged longitudinally displaceably in a guide 34 along the base 1. A joint mechanism 10 in the form of a pentagonal joint with four joints 71, 72, 73, 74 connects the other end 28 of the rod 2 to the longer leg 33 of the rod (FIG. 3).

Mittels des Motors 14 kann eine Hin- und Herbewegung des drehbar an der Basis 1 befestigten kürzeren Schenkels 31 der Stange 3 ausgeführt werden, wodurch der Gelenkmechanismus 10 betätigt wird und das Drehgelenk 72 die anatomische Bahnkurve 13 des Kniegelenkes um die Drehachse 12 des Hüftgelenkes imitiert.By means of the motor 14, a to and fro movement of the shorter leg 31 of the rod 3, which is rotatably attached to the base 1, can be carried out, whereby the joint mechanism 10 is actuated and the swivel joint 72 imitates the anatomical trajectory 13 of the knee joint about the axis of rotation 12 of the hip joint.

Fig. 3 zeigt die Beinbewegungsschiene in einem Bewegungszustand, wie er sich nach Verschiebung des Drehgelenkes 32 um 198 mm in Richtung des Pfeiles 17 nach rechts ergibt. Der längere Schenkel 33 der Stange 3 hat sich gegenüber der Stellung in Fig. 1 nach oben aufgerichtet und nach hinten bewegt, so dass das Drehgelenk 72 exakt die Bewegung des anatomischen Kniegelenkes imitiert. Der Gelenkmechanismus 10, der nachstehend im Detail anhand der Fig. 4 beschrieben wird, gestattet aber noch eine weitere Kontrolle des Bewegungsablaufs, welche darin besteht, dass die zur Basis 1 gerichtete Verlängerung der Stangen 5,5' bei jeder Stellung des Gelenkvielecks 7 zur Drehachse des Hüftgelenkes 12 gerichtet ist.Fig. 3 shows the leg movement rail in a state of movement, as it results after displacement of the swivel joint 32 by 198 mm in the direction of arrow 17 to the right. The longer leg 33 of the rod 3 has risen upwards relative to the position in FIG. 1 and moved backwards, so that the swivel joint 72 exactly imitates the movement of the anatomical knee joint. The articulated mechanism 10, which is described in detail below with reference to FIG. 4, allows yet another control of the movement sequence, which consists in the fact that the extension of the rods 5, 5 'towards the base 1 at every position of the articulated polygon 7 with respect to the axis of rotation of the hip joint 12 is directed.

Der in Fig. 4 schematisch dargestellte Gelenkmechanismus 10 besteht im wesentlichen aus einem Fünfeck mit 5 Seiten der Länge L1,L2,L3,L4 und L5, 4 Drehgelenken 71,72,73,74 und einem Fixpunkt 75. Die erste Seite des Gelenkvielecks 7 von der Länge L1 wird vom anderen Ende 28 der Stange 2 gebildet. Die dritte Seite des Gelenkvielecks 7 von der Länge L3 wird vom Ende des längeren Schenkels 33 der Stange 3 gebildet. Die zweite Seite des Gelenkvielecks 7 von der Länge L2 wird durch eine Stange 4 gebildet, welche an ihrem einen Ende 75 im Abstand L3 vom Ende des längeren Schenkels 33 der Stange 3 mit letzterer verbunden ist und mit ihrem anderen Ende 42 mittels des Drehgelenkes 71 am anderen Ende 28 der Stange 2 befestigt ist. Die vierte Seite des Gelenkvielecks 7 von der Länge L4 wird durch die als Oberschenkelauflage dienende Stange 5 gebildet, welche mit ihrem einen Ende 51 über ein Drehgelenk 72 mit dem Ende des längeren Schenkels 33 der Stange 3 verbunden ist. Die fünfte Seite des Gelenkvielecks 7 von der Länge L5 wird schliesslich durch eine Stange 6 gebildet, welche mit ihrem einen Ende 61 mittels eines Drehgelenkes 74 im Abstand L1 vom anderen Ende 28 der Stange 2 an dieser befestigt ist und mit ihrem anderen Ende 62 mittels eines Drehgelenkes 73 an der als Oberschenkelauflage dienenden Stange 5 im Abstand L4 vom Drehgelenk 72 befestigt ist.
Wie aus Fig. 5 ersichtlich ist in der als Oberschenkelauflage dienenden Stange 5 ist eine T-förmigen Nut 52 vorgesehen in welcher zwei am Ende 62 der Stange 6 angebrachte Bolzen 63,64 in zwei zueinander senkrecht stehenden Richtungen gleiten können, welche durch die Doppelpfeile 18,19 angedeutet sind.
In Fig. 6 ist die Lageveränderung der beiden Bolzen 63,64 innerhalb der Nut 52 dargestellt, wie sie sich durch die in Fig. 3 dargestellte Stellung des Gelenkmechanismus 10 ergibt. Der in Richtung des Doppelpfeils 18 gleitende Bolzen 64 (ist gegenüber der in Fig. 5 gezeigten Endlage) zum Drehgelenk 72, während gleichzeitig der in Richtung des Doppelpfeils 19 gleitende Bolzen 63 zur Basis 1 hin verschoben worden ist. Dadurch ergibt sich eine Verkürzung der Länge L4 der vierten Seite des Gelenkvielecks 7 (siehe Fig. 4) und eine Verlängerung der Länge L5 der fünften Seite des Gelenkvielecks 7. Damit wird eine Nachführung der Oberschenkelachse zum Hüftdrehpunkt erreicht und eine anatomiegerechte Stützung des Oberschenkels während des Bewegungsablaufs der erfindungsgemässen Beinbewegungsschiene, ohne dass ein technischer Umbau für die Lagerung und Bewegung der jeweils andersseitigen Extremität erforderlich ist.
4 consists essentially of a pentagon with 5 sides of the length L1, L2, L3, L4 and L5, 4 swivel joints 71, 72, 73, 74 and a fixed point 75. The first side of the joint polygon 7 of length L1 is formed by the other end 28 of the rod 2. The third side of the polygon 7 of length L3 is formed by the end of the longer leg 33 of the rod 3. The second side of the polygon 7 of length L2 is formed by a rod 4, which at one end 75 at a distance L3 from the end of the longer leg 33 of the rod 3 is connected to the latter and is attached at its other end 42 by means of the swivel joint 71 to the other end 28 of the rod 2. The fourth side of the polygon 7 of length L4 is formed by the rod 5 serving as a thigh support, which is connected at one end 51 via a swivel joint 72 to the end of the longer leg 33 of the rod 3. The fifth side of the articulated polygon 7 of length L5 is finally formed by a rod 6, which is fastened to its end 61 by means of a swivel 74 at a distance L1 from the other end 28 of the rod 2 and with its other end 62 by means of a Swivel 73 is attached to the rod 5 serving as a thigh support at a distance L4 from the swivel 72.
5, a T-shaped groove 52 is provided in the rod 5 serving as a thigh support, in which two bolts 63, 64 attached to the end 62 of the rod 6 can slide in two mutually perpendicular directions, which are indicated by the double arrows 18 , 19 are indicated.
FIG. 6 shows the change in position of the two bolts 63, 64 within the groove 52, as results from the position of the joint mechanism 10 shown in FIG. 3. The bolt 64 sliding in the direction of the double arrow 18 (is opposite the end position shown in FIG. 5) to the swivel joint 72, while at the same time the bolt 63 sliding in the direction of the double arrow 19 has been displaced toward the base 1. This results in a shortening of the length L4 of the fourth side of the Articulated polygons 7 (see FIG. 4) and an extension of the length L5 of the fifth side of the articulated polygons 7. This results in a tracking of the thigh axis to the hip pivot point and anatomical support of the thigh during the movement sequence of the leg movement splint according to the invention, without a technical modification for the Positioning and movement of the opposite limb is required.

In Fig. 7 ist der Bewegungsablauf der erfindungsgemässen Beinbewegungsschiene bei einem Patienten der Körpergrösse 1,90 m und in Fig. 8 bei einem solchen von nur 1,35 m dargestellt. In den Fig. 7 und 8 sind zwischen den beiden Extrempositionen jeweils 4 aufeinanderfolgende Zwischenstellungen der Drehgelenke 32 und 71 dargestellt, d.h. insgesamt 6 Positionen.FIG. 7 shows the movement sequence of the leg movement splint according to the invention in a patient who is 1.90 m tall and in FIG. 8 in a patient who is only 1.35 m tall. 7 and 8 each show 4 successive intermediate positions of the rotary joints 32 and 71 between the two extreme positions, i.e. 6 positions in total.

In Fig. 7 wird das Drehgelenk 32 von seiner linken Extremposition 32a über die dargestellten Zwischenpositionen um die waagerechte Hublänge von 619 mm nach rechts bis zur rechten Extremposition 32f verschoben. Entsprechend wandert das Drehgelenk 71 des Gelenkmechanismus 10 von der Position 71 a nach 71f, so dass die Beinbewegungsschiene eine Bahnkurve 13 um den virtuellen Hüftdrehpunkt 12 beschreibt, welche weitgehend mit der idealisierten, körpereigenen Bahnkurve des Kniegelenkes 13' um den Hüftdrehpunkte 12' des Patienten übereinstimmt.In FIG. 7, the swivel joint 32 is shifted from its left extreme position 32a to the right through the horizontal positions shown by the horizontal stroke length of 619 mm to the right extreme position 32f. Correspondingly, the swivel joint 71 of the joint mechanism 10 moves from position 71a to 71f, so that the leg movement rail describes a path curve 13 around the virtual hip pivot point 12, which largely corresponds to the idealized body's own path curve of the knee joint 13 'around the patient's hip pivot points 12' .

In Fig. 8 wird das Drehgelenk 32 von seiner linken Extremposition 32a über die dargestellten Zwischenpositionen um 477 mm nach rechts bis zur rechten Extremposition 32f verschoben. Die gegenüber Fig. 7 verkürzte Hublänge der Beinbewegungsschiene reflektiert die hier vorliegende verkürzte Körperlänge von 1,35 m.In FIG. 8, the swivel joint 32 is moved from its left extreme position 32a to the right through the illustrated intermediate positions by 477 mm to the right extreme position 32f postponed. The shortened stroke length of the leg movement rail compared to FIG. 7 reflects the shortened body length of 1.35 m present here.

Claims (12)

  1. A leg mobility rail for the repeated motion of the knee and hip joints, comprising:
    A) a base (1),
    B) a rod (2) arranged on the upper leg side, attached to said base (1) at one (21) of its ends by means of a rotation joint (22);
    C) a bent rod (3) arranged on the lower leg side, attached to the base (1) with its shorter arm (31) by means of a rotation joint (32) arranged such that it may slide along the base (1), and
    D) an articulated mechanism (10) comprising an articulated polygon (7) connecting the other end (28) of rod (2) and the longer arm (33) of rod (3), characterized in that:
    E) said articulated polygon (7) comprises four articulations (71, 72, 73, 74) and one fixed point (75) which, during a reciprocating movement of said shorter arm (31) of rod (3) which is rotatably attached to said base (1), generate a movement curve (13) around the ideal centre of rotation of hip (12), corresponding to the ideal movement curve (13') of the knee joint around the bodily centre of rotation of the patient's hip (12'); and
    F) said articulated polygon (7) comprises five sides having respective lengths L1, L2, L3, L4 and L5.
  2. The leg mobility rail as claimed in claim 1, characterized in that two parallel sets of rods (2, 3; 2', 3') and articulated mechanisms (10, 10') are arranged on said base (1) and are connected to each other by means of a support means (8), such that the patient's leg is received between them.
  3. The leg mobility rail as claimed in claim 2, characterized in that said support means (8) is able to be adjusted in height, such that the bone of the patient's lower leg may be positioned substantially in the plane formed by said two parallel rods (3, 3').
  4. The leg mobility rail as claimed in claim 2, characterized in that two parallel rods (5, 5') in the articulated polygon (7) are connected to each other by means of a support means (9), such that the patient's lower leg is received therebetween.
  5. The leg mobility rail as claimed in claim 4, characterized in that said support means (9) are adjustable in height, such that the bone of the patient's upper leg may be positioned substantially in the plane formed by said two parallel rods (5, 5').
  6. The leg mobility rail as claimed in one of claims 2 to 5, characterized in that the prolongation of said rods (5, 5') directed towards said base (1) is directed towards the rotational axis (12) of said hip joint, in each position of said articulated polygon (7).
  7. The leg mobility rail as claimed in one of claims 1 to 6, characterized in that:
    A) the first side of said articulated polygon (7), which has a length L1, is formed from the other end (28) of rod (2);
    B) the third side of said articulated polygon (7), which has a length L3, is formed from the end of the longer arm (33) of rod (3);
    C) the second side of said articulated polygon (7), which has a length L2, is formed by a rod (4), one end (41) of which is linked to rod (4) at a distance L3 from the end of said longer arm (33) of rod (3), the other end (42) being attached to said other end (28) of rod (2) by means of the rotation joint (71);
    D) the fourth side of said articulated polygon (7), which has a length L4, is formed by rod (5) functioning as a support for the upper leg and linked with the end of said longer arm (33) of rod (3) at one (51) of the ends thereof, by means of a rotation joint (72); and
    E) the fifth side of said articulated polygon (7), which has a length L5, is formed by a rod (6) attached to rod (2) at one (61) of its ends, at a distance L1 from said other end (28) of rod (2), by means of a rotation joint (74), and is attached to bar (5) functioning as a support for the upper leg at the other end (62) thereof, at a distance L4 from said rotation joint (72), by means of a rotation joint (73).
  8. The leg mobility rail as claimed in claim 7, characterized in that said other end (62) of rod (6) is mounted such that it may slide along two directions perpendicular to each other by means of two bolts (63, 34), in a T-shaped groove (52) positioned in rod (5) functioning as a support for the upper leg.
  9. The leg mobility rail as claimed in one of claims 1 to 8, characterized in that rod (2) on the upper leg side is of adjustable length, for the adjustment to the anatomical length of the femur.
  10. The leg mobility rail as claimed in one of claims 1 to 9, characterized in that a support (11) is provided on the longer arm (33) of rod (3) for the foot, for the adjustment to the anatomical length of the tibia.
  11. The leg mobility rail as claimed in one of claims 1 to 10, characterized in that it is able to be driven by a motor (14).
  12. The leg mobility rail as claimed in one of claims 1 to 11, characterized in that said bent rod (3) on the lower leg side is L-shaped.
EP93902140A 1993-01-04 1993-01-04 Leg movement rail Expired - Lifetime EP0676944B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT93902140T ATE149338T1 (en) 1993-01-04 1993-01-04 LEG MOVEMENT SPLINT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1993/000001 WO1994015571A1 (en) 1993-01-04 1993-01-04 Leg movement rail

Publications (2)

Publication Number Publication Date
EP0676944A1 EP0676944A1 (en) 1995-10-18
EP0676944B1 true EP0676944B1 (en) 1997-03-05

Family

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Application Number Title Priority Date Filing Date
EP93902140A Expired - Lifetime EP0676944B1 (en) 1993-01-04 1993-01-04 Leg movement rail

Country Status (3)

Country Link
EP (1) EP0676944B1 (en)
DE (1) DE59305674D1 (en)
WO (1) WO1994015571A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008023573A1 (en) 2008-05-05 2009-11-12 Medireha GmbH Produkte für die medizinische Rehabilitation Leg movement splint for repetitive movement of the knee and hip joint with assistance function during active use
CN110575352A (en) * 2019-09-25 2019-12-17 深圳市丞辉威世智能科技有限公司 exoskeleton for limb rehabilitation
CN110575355A (en) * 2019-09-25 2019-12-17 深圳市丞辉威世智能科技有限公司 exoskeleton for limb rehabilitation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759901B1 (en) 1997-02-27 1999-07-09 Smith & Nephew Kinetec Sa DEVICE FOR PRODUCING CONTINUOUS PASSIVE DISPLACEMENT
RU2139701C1 (en) * 1998-10-08 1999-10-20 Жилин Владислав Иванович Device for recovery of mobility in joints
EP3021809B1 (en) 2013-07-19 2017-07-12 Lambda Health System SA Systems, devices and methods for exercising the lower limbs
US11135118B2 (en) 2018-05-11 2021-10-05 Pavel Ivanov Passive range of motion device
CN111903554B (en) * 2020-08-03 2024-06-11 天津理工大学 Small pig stair climbing simulation device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4825852A (en) * 1986-10-31 1989-05-02 Sutter Biomedical, Inc. Continuous passive motion device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008023573A1 (en) 2008-05-05 2009-11-12 Medireha GmbH Produkte für die medizinische Rehabilitation Leg movement splint for repetitive movement of the knee and hip joint with assistance function during active use
WO2009135619A1 (en) 2008-05-05 2009-11-12 Medireha GmbH Produkte für die medizinische Rehabilitation Leg movement rail for the repetitive movement of the knee and hip joint with assistance function for active use
CN110575352A (en) * 2019-09-25 2019-12-17 深圳市丞辉威世智能科技有限公司 exoskeleton for limb rehabilitation
CN110575355A (en) * 2019-09-25 2019-12-17 深圳市丞辉威世智能科技有限公司 exoskeleton for limb rehabilitation

Also Published As

Publication number Publication date
EP0676944A1 (en) 1995-10-18
WO1994015571A1 (en) 1994-07-21
DE59305674D1 (en) 1997-04-10

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