DEVANTABLE SPATULA FOR A LARYNGOSCOPE

Description

[0001] The present invention relates to a deformable spatula for an adaptable or adaptive laryngoscope, in particular for an adaptable or adaptive intubation laryngoscope or an adaptable or adaptive laryngoscope for laryngeal surgery or other tasks within otolaryngology or oto-rhino-laryngology.

[0002] For endotracheal intubation in anesthesia, emergency medicine, intensive care, and laryngeal surgery, an unobstructed access to the larynx, vocal cords, and ultimately the trachea is required for intubation or surgical procedures. A laryngoscope is used to advance the tongue forward or rostrally. A laryngoscope typically consists of a more or less curved blade with a handle positioned at approximately a right angle to its proximal end.

[0003] To allow for adaptation to the patient's anatomy, the blade is usually interchangeable. An intubation set contains a variety of blades of different lengths and curvatures. Furthermore, different designs are available for various applications and / or the preferences of medical personnel, such as those based on Macintosh, Miller, Dörges, and McCoy, the latter featuring a movable distal end.

[0004] A laryngoscope with a deformable distal end is also described in WO 97 / 30626 A1. The blade 4 of the laryngoscope has several slits 40 in a central section 14 (page 6, lines 24 to 28; Figure 1The slots 40 divide the central section 14 into segments 42, which are connected to each other only by narrow webs acting as solid-body hinges (ibid.). A push rod 48 is movable within a guide tube 46 (page 7, lines 8, 9). A distal end of the push rod 48 is welded to a distal end 20 of the spatula 4 (page 7, lines 5, 6). Figures 1 to 4 ). An end of an actuating lever 56 designed as a sliding device 60 on a handle 2 of the laryngoscope can push the proximal end 50 of the push rod 48 distally (page 7, lines 13 to 18) in order to bend the middle section 14 of the spatula 4 (page 7, lines 7 to 10; Figure 2 ).

[0005] In FR 2 821 736 a laryngoscope 1 with a handle 2 and a spatula 3 is described (pages 11 to 14), Figures 1 to 3 ). The spatula 3 comprises a plurality of articulated segments 14 (page 8, lines 2 to 7; Figure 1). For shaping the spatula 3, a flexible element 15 is provided, the distal end 16 of which is connected to the distal end 9 of the spatula 3, and the proximal end 17 of which is movable relative to the handle 2 (page 8, lines 9 to 14; Figure 1 ).

[0006] In US 2010 / 0261968 A1, a movable laryngoscope 700 with a handle 702 and a spatula 704 (paragraph

[0074] , Figure 7 ). The spatula 704 comprises a main spatula 706, a proximal spatula 708 and a distal spatula 710, which are connected to each other by joints 712, 714 (paragraph

[0075] , Figure 7 ). The handle 702 comprises a spatula control component 720 or a knob 902 for controlling the curvature of the spatula 704 (paragraphs

[0082] ,

[0092] ; Figure 7 , 9A device 1206, referred to as a proximal pusher, couples the knob 902 to the proximal spatula 708 at the joint 712 (paragraphs

[0102] ,

[0104] ; figures 13, 14). A device 1208, referred to as a distal pusher, couples a knob 1402 to the distal spatula 710 at the joint 714 (ibid.).

[0007] In WO 2011 / 150469 A1, a laryngoscope with a blade 1 and a handle 3 is described. The distal end of the blade 1 is formed by several segments 7A, 7B, 7C, which are connected to each other by joints 8A, 8B, 8C (page 17, fourth-to-last paragraph; Figures 3 , 11, 19, 20, 21, 22, 26). The curvature of the spatula 1 can be changed by means of an operating element 11 on the handle 3 (page 17, third to last paragraph; Figures 3 , 11, 19, 20, 21, 22, 26). The operating element 11 is connected to the links 7A, 7B, 7C by means of clamping devices D, M, P (paragraph bridging pages 19, 20; Figures 8 ,9, 10 , 22, 24).

[0008] In US 2011 / 0144436 A1, a device 100, resembling a laryngoscope and comprising a handle 102 and a spatula 104, is described (paragraph

[0027] , Figure 1 ). The curvature of the spatula 104 can be adjusted, parts of the spatula 104 or the entire spatula 104 can be adjusted relative to the handle 102 (paragraph

[0028] ).

[0009] In US 2011 / 0319718 A1, a laryngoscope 100 is described comprising a handle 104 and a blade, the arm component comprising a first arm component 108 and a second arm component 110 with a joint 112 between them (paragraphs

[0052] ,

[0053] , figures 6A, 6B). A connecting rod or cord connects the second arm component 110 to the handle 104 such that the angle between the second arm component and the handle 104 is essentially constant, independent of the angular position of the first arm component (paragraph

[0060] , figures 6A, 6B).

[0010] US Patent 2015 / 031957 describes a laryngoscope with resistance feedback. This laryngoscope comprises a sliding handle, a trigger pad, a rotating shaft, a first transmission rod, a second transmission rod, and a two-stage lever blade. The sliding handle has a curved front face connected to the two-stage lever blade. The two-stage lever blade comprises a first movable blade, a second movable blade, and a fixed blade. The first and second transmission rods are connected to the rotating shaft, which is attached to a drive post with an elastic element.

[0011] US 2010 / 261968 A1 discloses the preamble of claim 1. DE 10 2016 113498 A1 discloses the preamble of claim 9.

[0012] One object of the present invention is to provide an improved blade for an adaptable or adaptive laryngoscope and an improved laryngoscope. This object is achieved by the subject matter of the independent claims. Further developments are specified in the dependent claims.

[0013] A blade for an adaptable or adaptive laryngoscope comprises a proximal end that is articulated or connectable to a handle for manually holding the laryngoscope, a distal end for insertion into the pharynx of a patient, a first side that, when the blade is used, rests against the patient's tongue, a second side that, when the blade is used, faces the palate of the patient, a plurality of rigid links arranged longitudinally along the blade, each extending from the first side of the blade to the second side of the blade, a plurality of joints, each joint connecting two adjacent links, and a force transmission device for transmitting a force, comprising a proximal end and a distal end, the distal end of the force transmission device being mechanically connected to the distal end of the blade.wherein the force transmission device is movable between its distal end and its proximal end relative to the segments of the spatula in the longitudinal direction of the force transmission device, wherein the proximal end of the force transmission device is mechanically coupled to the handle part or is designed and configured to be mechanically coupled to the handle part in such a way that by pivoting the handle part relative to the proximal end of the spatula the force transmission device is movable relative to the proximal end of the spatula, wherein the force transmission device is flexible and made of an elastic material.

[0014] The spatula is specifically designed and configured to form a laryngoscope, which can be used for intubation, microlaryngeal surgery, or other tasks within otorhinolaryngology. The proximal end of the spatula is connected to the handle in a permanent and non-destructible manner, or in a non-destructively detachable or separable manner, but in any case, by a joint.

[0015] The handle is designed for manually holding and guiding the laryngoscope. It is not merely a lever for controlling the curvature of the blade, but is itself designed and intended for manually holding and guiding the laryngoscope. The handle is the only handle component and—possibly together with a proximal portion of the blade near its proximal end—constitutes the only part of the laryngoscope that is touched, guided, and held by hand during normal use by medical personnel.

[0016] Each individual segment of the spatula is rigid, meaning that it is not elastically or plastically deformable, or only minimally so, when the spatula is used as intended. Each individual joint can be designed as a solid joint or as a positive-locking joint (for example, with a shaft, a journal, or similar component in one or more corresponding bearing shells). Each joint, in particular, allows pivoting about a single pivot axis defined by the joint, with all pivot axes being parallel to each other. The joints between the segments allow the entire spatula to be deformed. By pivoting the segments of the spatula relative to each other, the curvature of the spatula can be changed.

[0017] The rigid or articulated mechanical connection between the distal end of the force transmission device and the distal end of the blade, and the longitudinal movement of the force transmission device relative to the blade segments between the distal and proximal ends, allow for variation in the blade's curvature by moving the force transmission device. The coupling of the proximal end of the force transmission device to the handle for manually holding the laryngoscope enables control of the blade's curvature by pivoting the handle relative to the proximal end of the blade. This eliminates the need for any additional lever or actuating mechanism to achieve variation in the blade's curvature.This can simplify both the design and therefore the manufacture of the spatula or the entire adaptable laryngoscope, as well as make handling by medical personnel more intuitive and therefore easier and safer.

[0018] In the case of a spatula as described here, in particular in the case of one or more or all of the majority of joints, the distance of the joint from the first side of the spatula is greater than the distance of the force transmission device from the first side of the spatula, wherein the force transmission device is designed to transmit a tensile force.

[0019] In this design, the distance of the joint from the second side of the spatula is smaller than the distance of the force transmission device from the second side.

[0020] In the case of a spatula as described here, in particular in the case of one or more or all of the majority of joints, the distance of the joint from the first side of the spatula is smaller than the distance of the force transmission device from the first side, wherein the force transmission device is designed to transmit a pressure or shear force.

[0021] In this design, the distance of the joint from the second side of the spatula is smaller than the distance of the force transmission device from the second side.

[0022] In a spatula as described here, either the force transmission device is arranged near the first side of the spatula and is designed and intended to transmit a tensile force, and one or more or all of the majority of joints are arranged near the second side of the spatula, or one or more or all of the majority of joints are arranged near the first side of the spatula and the force transmission device is arranged near the second side of the spatula and is designed and intended to transmit a compressive force.

[0023] Both spatula designs allow for adjustment of the spatula's curvature to suit the application and the patient. Positioning the joints on the first side of the spatula, which rests against the patient's tongue during intended use, can simplify an atraumatic design. However, the force transmission mechanism must transmit a compressive or shear force to increase the spatula's curvature and must be designed and / or guided with sufficient rigidity to prevent lateral deflection.

[0024] The arrangement of the joints on the second side, which faces the palate of the patient during intended use, can allow for a simpler design of the force transmission device and its guidance, since the force transmission device only needs to transmit a tensile force to increase the curvature of the spatula.

[0025] In a spatula as described here, in particular one or more or all of the majority of the segments have a ring-shaped cross-section or a U-shaped cross-section or a C-shaped cross-section with respect to a cutting plane orthogonal to the longitudinal direction of the spatula.

[0026] An annular cross-section is a closed cross-section, for example, in the shape of a ring or the perimeter of a square or rectangle, or any other polygon, optionally with rounded corners. A U-shaped or C-shaped cross-section is a cross-section open on one side (for example, the first side or the second side of the spatula), for example, in the shape of part of an annular circle or the edge of a rectangle or other polygon, optionally with rounded corners. A U-shaped cross-section is present when the ends of the cross-section are parallel or substantially parallel to each other at its opening. A C-shaped cross-section is present when the ends of the cross-section face each other partially or completely near its opening.

[0027] An annular, U-shaped, or C-shaped cross-section can enable an atraumatic design of the spatula, particularly if the opening of the U-shaped or C-shaped cross-section is located on the side facing the patient's palate during intended use. Furthermore, an annular, U-shaped, or C-shaped cross-section can allow the force transmission device to be guided within it.

[0028] In a spatula such as the one described here, the force transmission device is arranged in particular within a cavity at least partially enclosed by one or more or all of the majority of links.

[0029] The arrangement of the power transmission device within the cavity can protect the power transmission device from damage and enable simple mechanical guidance of the power transmission device.

[0030] A spatula, as described here, further comprises in particular a guide device in one of the plurality of links, for guiding the power transmission device.

[0031] In the case of a spatula as described here, the guide device specifically comprises a portion of an inner surface of the segment.

[0032] The guide device includes, for example, a concave surface section on the inside of the link on which the power transmission device is guided with minimal play and friction.

[0033] In the case of a spatula as described here, the guiding device includes in particular a channel or an eyelet.

[0034] The cross-section of the channel or eyelet is adapted to the cross-section of the power transmission device in such a way that the power transmission device is guided in the channel or eyelet with minimal play and friction.

[0035] In a spatula as described here, in particular one or more or all of the majority of joints are designed as solid joints, whereby the solid joint defines a rest configuration of the joint by means of an elastic restoring force.

[0036] In a spatula such as described here, an elastic element is provided, particularly at one or more or all of the majority of joints, wherein the elastic element defines a rest configuration of the joint by means of an elastic restoring force.

[0037] The rest configuration of the joint is, in particular, the configuration or angular position of the joint at which the elastic energy stored in the solid joint or elastic element is minimal. Whenever the joint is deflected from its rest configuration or angular position, the solid joint or elastic element absorbs energy. Each deflection from the rest configuration or angular position thus occurs against the elastic restoring force of the solid joint or elastic element. Multiple solid joints or multiple elastic elements of the spatula can be arranged and / or dimensioned differently to generate restoring forces or moments of varying magnitudes.

[0038] A spatula as described herein further comprises in particular one or more deflection devices on which the force transmission device rests or with which the force transmission device is mechanically connected or which is part of the force transmission device (80), wherein the force transmission device extends distal to the deflection device in a first direction and proximal to the deflection device in a second direction which differs from the first direction.

[0039] The first direction, in which the force transmission device extends distal to a deflection device, and the second direction, in which the force transmission device extends proximal to the same deflection device, differ in particular by at least 5 degrees, or at least 10 degrees, or at least 20 degrees, or at least 30 degrees, or at least 50 degrees, or at least 70 degrees. One or more deflection devices may be arranged in several or all of the plurality of links. Each deflection device may simultaneously be a guide device or be integrated with a guide device. In particular, one or more deflection devices may cause the distances between the force transmission device and the joints to be of different magnitudes, so that a force transmitted by the force transmission device is accompanied by moments of different magnitudes at the joints.

[0040] In a spatula such as the one described here, the deflection device is located particularly near the proximal end of the spatula.

[0041] A deflection device near the proximal end of the spatula can simplify the mechanical coupling of the handle part, which pivots relative to the proximal end of the spatula, with the power transmission device.

[0042] In a spatula such as described here, the force transmission device includes in particular a translation device that translates a first force and a first path proximal to the translation device into a second force and a second path distal to the translation device.

[0043] In particular, the ratio between the first force and the second force, and the ratio between the second path and the first path - neglecting friction - are equal.

[0044] In the case of a spatula as described here, the transmission device includes in particular a lever, a pulley system or other gearing.

[0045] A translation device can enable a desired distribution of a force exerted on the proximal end of the force transmission device to the individual links and thus defined moments at the joints between the links or defined ratios between the moments at the individual joints.

[0046] A blade for an adaptive laryngoscope comprises a proximal end that is connected or connectable to a handle for manually holding the laryngoscope, a distal end for insertion into a patient's pharynx, a first chain consisting of a plurality of links arranged longitudinally along the blade and connected in pairs by articulation, extending from the proximal end to the distal end of the blade, a second chain consisting of a plurality of links arranged longitudinally along the blade and connected in pairs by articulation, extending from the proximal end to the distal end of the blade, a plurality of spacers, each connecting a point on a link of the first chain to a point on a link of the second chain by articulation and at a predetermined distance, and a force transmission device for transmitting a force.with a proximal end and a distal end, wherein the distal end of the force transmission device is mechanically connected to the distal end of the spatula, wherein the force transmission device is movable between its distal end and its proximal end relative to members of the spatula in the longitudinal direction of the force transmission device, wherein the force transmission device is flexible and made of an elastic material.

[0047] The spatula is specifically designed and configured to form a laryngoscope, which can be used for intubation, microlaryngeal surgery, or other tasks within otorhinolaryngology. The proximal end of the spatula is connected to the handle in a permanent and non-destructible manner, or in a non-destructively detachable or separable manner, but in any case, by a joint.

[0048] The handle is designed for manually holding and guiding the laryngoscope. It is not merely a lever for controlling the curvature of the blade, but is itself designed and intended for manually holding and guiding the laryngoscope. The handle is the only handle component and—possibly together with a proximal portion of the blade near its proximal end—constitutes the only part of the laryngoscope that is touched, guided, and held by hand during normal use by medical personnel.

[0049] The links of the first chain and the links of the second chain can each be connected in pairs by solid joints or by positive-locking joints (for example, with shafts or axle journals in corresponding bearing shells). The spacer components are formed, for example, by webs, plates, or frames arranged transversely to the longitudinal direction of the spatula. Each end or edge section of a spacer component is connected to one or two adjacent links of the first chain by a solid joint or a positive-locking joint. Each opposite end or edge section of the spacer component is connected to one or two adjacent links of the second chain by a solid joint or a positive-locking joint.

[0050] The distal end of the force transmission device is connected to the distal end of the blade, either rigidly or by a pivot. The proximal end of the force transmission device may be permanently and non-destructively detachable or separable to the handle for holding the laryngoscope, or it may be detachable or separable without damage. The proximal end of the force transmission device is mechanically coupled to the handle in such a way that pivoting the handle relative to the proximal end of the blade causes the force transmission device to move relative to the blade links. Forces or moments can be exerted directly or indirectly on the links of the chain by means of the force transmission device. This allows the force transmission device to influence the curvature of the blade.

[0051] A spatula, as described here, further comprises in particular a guide device on one of the majority of spacer components for guiding the power transmission device.

[0052] In a spatula as described here, a first guide device for guiding the force transmission device is provided, in particular on a first spacer component of the plurality of spacer components, wherein a second guide device for guiding the force transmission device is provided on a second spacer component of the plurality of spacer components, wherein a first ratio between the distance of the first guide device from a first end of the first spacer component facing the associated link of the first chain and the distance of the first guide device from a second end of the first spacer component facing the associated link of the second chain is different from a second ratio between the distance of the second guide device from a first end of the second spacer component facing the associated link of the first chain.and the distance of the second guide device from a second end of the second spacer component, which faces the associated link of the second chain.

[0053] The different arrangement of the guide devices on the spacer components can cause a force applied to the proximal end of the force transmission device to produce different forces or moments on the spacer components.

[0054] A laryngoscope comprises a spatula, as described here, and a handle part which is connected or connectable to the proximal end of the spatula.

[0055] In a laryngoscope as described here, the proximal end of the spatula is in particular articulated to the handle or connectable, wherein the proximal end of the force transmission device is coupled or connectable to the handle in such a way that a tensile force or a compressive or shear force can be exerted on the force transmission device by pivoting the handle relative to the proximal end of the spatula. Brief description of the characters

[0056] The following descriptions of the embodiments are explained in more detail with reference to the accompanying figures. They show: Figure 1 is a schematic representation of a laryngoscope; Figure 2 is a schematic sectional view of the laryngoscope. Figure 1 Figure 3 shows another schematic sectional view of the laryngoscope from the Figures 1 and 2 Figure 4 shows another schematic sectional view of the laryngoscope from the Figures 1 to 3Figure 5: a schematic sectional view of another laryngoscope; Figure 6: another schematic sectional view of the laryngoscope made of Figure 5 Figure 7: a schematic sectional view of another laryngoscope; Figure 8: a schematic sectional view of another laryngoscope; Figure 9: a schematic sectional view of another laryngoscope; Figure 10: a schematic sectional view of another laryngoscope Description of the embodiments

[0057] Figure 1 Figure 1 shows a schematic representation of a laryngoscope 10 with a handle 20 and a blade 30. The handle 20 is connected to a proximal end 32 of the blade 40 by a joint 26. The joint 26 allows the handle 20 to pivot relative to the blade 30, in particular to the proximal end 32 of the blade 30, about a pivot axis orthogonal to the plane of the drawing. Figure 1 Joint 26 can – as in Figure 1As indicated, the joint can be designed as a solid-state joint (often also referred to as a foil joint). Alternatively, the joint can be designed as a positive-locking joint, for example with a shaft or axle journal and one or more corresponding bearing shells.

[0058] The handle part 20 and the spatula 30 can be permanently and irretrievably connected to each other, as in the case of the one described in Figure 1 The laryngoscope 10 is shown to have a monolithic or largely monolithic structure with the solid joint 26. Alternatively, and in deviation from this, a coupling can be provided for a non-destructively detachable or separable mechanical connection between the handle and the blade 30. This coupling can be integrated with the joint 26 or provided at the end of the handle 20 facing the blade or at the end 32 of the blade 30 facing the handle 20.

[0059] The blade 30 has a first side 34, which, when the laryngoscope 10 is used, rests against the tongue and / or the base of the tongue of a patient, and a second side 36, which, when the laryngoscope 10 is used, faces the palate of the patient. The blade 30 extends to a distal end 38, which is designed with the largest possible radii of curvature, particularly for atraumatic use.

[0060] The spatula 30 comprises several segments 40, 50, 60, 70, which are connected to one another by joints 46, 56, 66. A proximal end 42 of a first segment 40 forms the proximal end 32 of the spatula 30. A distal end 44 of the first segment 40 is connected by a first joint 46 to a proximal end 52 of a second segment 50. A distal end 54 of the second segment 50 is connected by a second joint 56 to a proximal end 62 of a third segment 60. A distal end 64 of the third segment 60 is connected by a third joint 66 to a proximal end 72 of a fourth segment 70. A distal end 74 of the fourth segment 70 forms the distal end 38 of the spatula 30.

[0061] Each individual segment 40, 50, 60, 70 of the spatula 30 extends from the first side 34, which rests against the patient's tongue during the intended use of the laryngoscope 10, to the second side 36 of the spatula 30, which faces the palate of the patient during the intended use. Each segment 40, 50, 60, 70 is rigidly designed and is therefore not deformed, or not significantly deformed, by the forces and moments occurring during the intended use of the laryngoscope 10.

[0062] Joints 46, 56, 66 enable pivoting movements of adjacent links 40, 50, 60, 70 relative to each other about associated pivot axes orthogonal to the drawing plane. Figure 1 In the example shown, joints 46, 56, 66 are designed as solid joints. Alternatively, joints 46, 56, 66 could, for example, be designed as positive-locking joints with shafts and / or axle journals in corresponding bearing shells.

[0063] Joints 46, 56, 66 are located on the second side 36. Between segments 40, 50, 60, 70, gaps extend from the first side 34 to joints 46, 56, 66, allowing for an increase in the curvature of the spatula 30. Alternatively, and deviating from the illustration in Figure 1 The links 40, 50, 60, 70 can be formed in an overlapping manner, provided there is no gap between the links 40, 50, 60, 70.

[0064] In the gaps between the segments 40, 50, 60, and 70, a force transmission device 80 is visible, the proximal end of which is rigidly connected to the handle 20 and the distal end of which is rigidly connected to the fourth segment 70 and thus to the distal end 38 of the spatula 30. The force transmission device 80 is flexible due to its material and / or cross-section and is made of an elastic material. In the longitudinal direction, the force transmission device exhibits low elasticity, so that it is not significantly stretched or compressed by the forces occurring during the intended use of the laryngoscope 10.

[0065] Figure 2 shows a schematic representation of a section through the laryngoscope 10 along a plane parallel to the drawing plane of the Figure 1 The handle 20, the blade 30, or the entire laryngoscope 10 can be symmetrically positioned relative to the cutting plane of the Figure 2 be trained. The in Figure 2The configuration of the laryngoscope 10 shown corresponds to the one in Figure 1 configuration shown.

[0066] In Figure 2 It can be seen that the segments 40, 50, 60, 70 of the spatula 30 each enclose a cavity that is open at both ends. The entire spatula thus has a cavity which—apart from the gaps at the joints 46, 56, 66 between the segments 40, 50, 60, 70—is largely enclosed by the segments 40, 50, 60, 70. The force transmission device 80 is arranged in this cavity. A wall section of each segment 40, 50, 60, 70 on the first side 34, which, during intended use, rests against the patient's tongue, forms a guide 48, 58, 68, 78 against which the force transmission device 80 rests.

[0067] The proximal end 82 of the force transmission device 80 is connected to the handle part 20 at a point spaced apart from the joint 26 between the handle part 20 and the spatula 30. The force transmission device 80 is spaced apart from the joint 26 in the gap between the handle part 20 and the proximal end 32 of the spatula 30. The distal end 87 of the force transmission device 80 is mechanically connected to the fourth segment 40 at a point spaced apart from the joint 66 between the third segment 60 and the fourth segment 70. The force transmission device 80 is spaced apart from the joint 26 in the gap between the third segment 60 and the fourth segment 70. When the laryngoscope 10 is used as intended, the force transmission device 80 transmits a tensile force from the handle part 20 to the distal end 38 of the spatula 30, namely to its fourth segment 70.Because the force transmission device 80 is under tensile stress when the laryngoscope 10 is used as intended, it lies as in . Figure 2 indicated by the guide devices 48, 58, 68, 78. In order to allow elastic deformation of the force transmission device, especially in the areas between the handle part 20 and the spatula 30 and between the links 40, 50, 60, 70 of the spatula 30, the force transmission device is made of an elastic material and / or has a low cross-section, i.e., for example, the shape of a band.

[0068] Figure 3 shows another schematic representation of a section through the based on the Figures 1 and 2 Laryngoscope 10 shown. The sectioning plane of the Figure 3 corresponds to the cutting plane of the Figure 2 The Laryngoscope 10 is in Figure 3 presented in a configuration that differs from the one in the Figures 1 and 2The configuration shown differs.

[0069] At the in Figure 3 In the configuration shown, the handle 20 of the laryngoscope 10 is pivoted towards the proximal end 32 of the blade 30, and the blade 30 is opposite the one shown in Figure 2 The configuration shown is stretched, thus exhibiting a lower overall curvature. For this purpose, links 40, 50, 60, 70 are pivoted away from each other in pairs at joints 46, 56, 66, so that the gap between links 40, 50, 60, 70 is increased.

[0070] Figure 4 shows another schematic representation of a section through the based on the Figures 1 to 3 Laryngoscope 10 shown. The sectioning plane of the Figure 4 corresponds to the cutting planes of the Figures 2 and 3 In Figure 4 is a configuration shown that differs from those in the Figures 1 to 3 differs in the configurations shown.

[0071] At the in Figure 4In the configuration of the laryngoscope 10 shown, the handle part 20 is opposite the one shown in the Figures 1 to 3 The configurations shown pivot away from the proximal end 32 of the spatula 30. Due to the mounting of the proximal end 82 of the power transmission device, which is spaced apart from the joint 26 between the handle part 20 and the proximal end 32 of the spatula 30, this pivoting movement towards the configuration shown in the diagram is generated. Figure 4 The angular position of the handle part 20 shown in the diagram creates a tensile force in the force transmission device 80 and a displacement of the force transmission device 80 towards the proximal end 32 of the spatula 30. This, in turn, causes the second link 50 to pivot towards the first link 40, the third link 60 to pivot towards the second link 50, and the fourth link 70 to pivot towards the third link 60. This results in the following: Figure 4 configuration shown with a difference compared to those based on the Figures 1 to 3The configurations shown increased the curvature of the spatula 30.

[0072] Starting from the in Figure 4 In the configuration shown, a force exerted by a patient's tongue or tongue base on the first side 34 of the spatula 30 can cause the spatula 30 to extend to the position shown in the Figures 1 and 2 configuration shown and further up to the one in Figure 3 The configuration shown will result if no corresponding counterforce is applied to the handle part 20. As a result, the following occurs when using the configuration shown: Figures 1 to 4 The laryngoscope 10 shown is always in a configuration in which there is a balance of forces and moments on the handle part 20 (manually generated by medical personnel) and on the links 40, 50, 60, 70 of the spatula 30 (generated by the tongue and / or base of the tongue of a patient).

[0073] Figure 5shows a schematic representation of a section through another laryngoscope 10, which in some features, properties and functions is similar to the one shown based on the Figures 1 to 4 The laryngoscope shown resembles the one depicted. The sectioning plane of the Figure 5 corresponds to the cutting planes of the Figures 2 to 4 The following are, in particular, the characteristics, properties, and functions of the [product / service] in [location]. Figure 5 The laryngoscope shown is described, in which it differs from the one shown based on the Figures 1 to 4 The laryngoscope shown differs.

[0074] Even the one in Figure 5 The laryngoscope 10 shown has a handle 20 and a blade 30 consisting of several segments 40, 50, 60, 70, which are connected to each other by joints 26, 46, 56, 66. Similar to the one shown based on the Figures 1 to 4 The laryngoscope shown is also used in the one described. Figure 5 In the laryngoscope shown, joints 26, 46, 56, and 66 are designed as solid joints, but can alternatively and differently from the illustration in Figure 5for example, they may be designed as positive-locking joints with shafts or axle journals that are mounted in corresponding bearing shells.

[0075] Unlike the one based on the Figures 1 to 4 The laryngoscope shown is used in the Figure 5 The laryngoscope shown has joints 26, 46, 56, 66 not on the second side 36, but on the first side 34, which, when the laryngoscope 10 is used as intended, lies against the tongue or the base of the tongue of the patient.

[0076] As with the one based on the Figures 1 to 4 In the laryngoscope shown, a force transmission device 80 is also arranged within the cavity largely enclosed by the segments 40, 50, 60, 70 in the laryngoscope 10 shown in Figure 5. The laryngoscope 10 shown in Figure 5 differs from the one shown based on the Figures 1 to 4The laryngoscope shown is further distinguished by the fact that the force transmission device 80 is not located on the first side 34, but rather on the second side 36 of the blade 30, which faces the palate when the laryngoscope 10 is used as intended. Accordingly, a proximal end 82 of the force transmission device 80 is mechanically connected to the handle 20 at a point spaced apart from the joint 26 between the handle 20 and the proximal end 32 of the blade 30, and a distal end 87 of the force transmission device 80 is mechanically connected to the fourth segment 70 at a point spaced apart from the joint 66 between the third segment 60 and the fourth segment 70 on the second side 36 of the blade 30.

[0077] The in Figure 5 The laryngoscope 10 shown has guide devices 48, 58, 68 for the force transmission device 80, which, unlike the one shown based on the Figures 1 to 4The laryngoscope shown forms a channel interrupted only between segments 40, 50, 60, and 70, in which the force transmission device 80 is guided with minimal play and friction. This is also evident from the Figures 1 to 4 The laryngoscope shown may differ from the illustrations in the Figures 2 to 4 They have channel-shaped guide devices for the power transmission device.

[0078] At the in Figure 5 The laryngoscope 10 shown causes the handle 20 to swivel from the position shown in Figure 5In the configuration shown, a pressure or shear force is applied to the proximal end 32 of the spatula 30 in the force transmission device 80, and the force transmission device 80 is moved distally relative to the first segment 40 of the spatula 30. The guidance of the force transmission device 80 by the channel-shaped guide elements 48, 58, 68 and a sufficiently rigid design of the force transmission device 80 prevent lateral deflection of the force transmission device 80 under the forces occurring during intended use.

[0079] Figure 6 shows a schematic representation of another section through the based on the Figure 5 Laryngoscope shown. The sectioning plane of the Figure 6 corresponds to the cutting plane of the Figure 5 The in Figure 6 The configuration shown differs from the one in Figure 5 configuration of the laryngoscope shown 10.

[0080] At the in Figure 6In the configuration shown, the handle part 20 is pivoted towards the proximal end 32 of the spatula 30. This causes a compressive or shear force in the force transmission device 80 and a distal movement of the force transmission device 80 relative to the first segment 40, the second segment 50, and the third segment 60 of the spatula 30, and an increase in the curvature of the spatula 30. Consequently, in the Figure 6 In the configuration shown, the gap between the limbs 40, 50, 60, 70, which extend from the second side 36 facing the palate of the patient in the intended use to the joints 46, 56, 66, is widened.

[0081] As with the one based on the Figures 1 to 4 The laryngoscope shown can also be used in the case described. Figures 5 and 6In the laryngoscope 10 shown, the curvature of the blade 30 can be adjusted by pivoting the handle 20 relative to the proximal end 32 of the blade 30. The blade 30 thus assumes a shape in which there is a balance between the forces and moments manually generated on the handle 20, the forces and moments acting on the segments 40, 50, 60, 70 of the blade 30, and, if applicable, restoring forces of the joints 26, 46, 56, 66.

[0082] Figure 7 shows a schematic representation of a section through another laryngoscope 10, which in some features, properties and functions resembles the one based on the Figures 1 to 6 The laryngoscopes shown resemble the one depicted. The sectioning plane of the Figure 7 corresponds to the cutting planes of the Figures 2 to 6 The following are, in particular, the characteristics, properties, and functions of the [product / service] in [location]. Figure 7 The laryngoscope shown is described, in which it differs from those shown based on the Figures 1 to 6The laryngoscopes shown differ.

[0083] The in Figure 7 The laryngoscope shown (10) differs from the one shown based on the Figures 1 to 4 The laryngoscope shown is distinguished in particular by the provision of a deflection device 84 for the force transmission device 80. In the illustrated example, the deflection device 84 is arranged in the first segment 40 of the blade 30. The deflection device 84 has approximately the shape of a circular segment, against the circumference of which the force transmission device 80 rests, and whose apex is connected to an inner surface of the first segment 40 by a solid joint 85. In the illustrated example, the force transmission device 80 is also approximately point-like and materially bonded to the deflection device 84.

[0084] The deflection device 84 causes a deflection of the direction in which the power transmission device 80 runs. The deflection device 84 can reduce the friction between the power transmission device 80 and the first member 40. Furthermore, the solid joint 85 between the deflection device 84 and the first member 40 can be arranged differently from the illustration in Figure 7 The force transmission device 80 is located at a distance from the center of curvature of the surface of the deflecting device 84. This can effect a translation whereby a first force and a first displacement at the force transmission device 80 proximal to the deflecting device 84 are translated into a second force and a second displacement distal to the deflecting device 84. This translation can depend on the position of the deflecting device 84 and thus on the position of the force transmission device 80.

[0085] Contrary to the representation in Figure 7The power transmission device 80 can be connected to the deflection device 84 only by friction or not at all. This differs from the illustration in Figure 7 Furthermore, the deflection device 84 can be designed as a roller or wheel or roller segment or wheel segment, or in the form of a cam disk. Furthermore, the deflection device 84 can deviate from the illustration in Figure 7 be connected to the first member 40 via a shaft or one or more axle journals and corresponding bearing shells. This differs from the illustration in Figure 7 The deflection device 84 can also be arranged in the second member 50 or in the third member 60. Furthermore, contrary to the illustration in Figure 7 Several deflection devices 84 are provided.

[0086] Figure 8 shows a schematic representation of a section through another laryngoscope 10, which in some features, properties and functions resembles the one based on the Figures 1 to 7The laryngoscopes shown resemble the one depicted. The sectioning plane of the Figure 8 corresponds to the cutting planes of the Figures 2 to 7 The following are, in particular, the characteristics, properties, and functions of the [product / service] in [location]. Figure 8 The laryngoscope shown is described, in which it differs from those shown based on the Figures 1 to 7 The laryngoscopes shown differ.

[0087] The in Figure 8 The laryngoscope shown (10) differs in particular from the one shown based on the Figures 1 to 4The laryngoscope shown is characterized in particular by the fact that at the opposing ends 44, 52, 54, 62, 64, 72 of the segments 40, 50, 60, 70, guide elements 48, 58, 68, 78 in the form of eyelets with different distances from the joints 46, 56, 66 are provided. In the illustrated example, at opposite ends 44, 52 or 54, 62 or 64, 72 of two adjacent segments 40, 50, 60, 70, two opposing eyelets 48, 58, 68, 78 are always provided. In contrast, at each transition between two adjacent links 40, 50, 60, 70, only one guide device 48, 58, 68, 78 may be provided at one end 44, 52, 54, 62, 64, 72 of one of the two adjacent links 40, 50, 60, 70.

[0088] The different distances of the guide devices 48, 58, 68, 78 from the joints 46, 56, 66 between the links 40, 50, 60, 70 cause a tensile force in the force transmission device 80 to generate different bending moments at the joints 46, 56, 66. For example, the Figure 8 The indicated arrangement of the guide elements 48, 58, 68, 78 shows that pivoting the handle part 20 relative to the proximal end 32 of the blade 30 affects the curvature at the third joint 66 somewhat more strongly than at the second joint 56 and significantly more strongly than at the first joint 46. This can, for example, compensate for the fact that, when using the laryngoscope 10, the base of the tongue (near the distal end 38 of the blade 30) exerts a greater force on the blade 30 than other parts of the tongue, or that a force is to be exerted primarily with the distal end 38 of the blade of the laryngoscope 10.

[0089] Figure 9 shows a schematic representation of a section through another laryngoscope 10, which in some features, properties and functions resembles the one based on the Figures 1 to 8 The laryngoscopes shown resemble the one depicted. The sectioning plane of the Figure 9 corresponds to the cutting planes of the Figures 2 to 8 The following are, in particular, the characteristics, properties, and functions of the [product / service] in [location]. Figure 9 The laryngoscope shown in section 10 is described, in which it differs from those shown based on the Figures 1 to 8 The laryngoscopes shown differ.

[0090] The in Figure 9 The laryngoscope 10 shown differs in particular from those shown based on the Figures 1 to 4 , 7 and 8The laryngoscopes shown are distinguished in particular by the fact that the force transmission device 80 comprises several levers 91, 92, 93, which are connected to the handle part 20, to each other, and to the fourth segment 70 by pull rods 94, 95, 96, 97 or other low-extensibility pull elements. A first pull rod 94 couples the handle part 20 to a first lever 91 in the first segment 40. A second pull rod 95 couples the first lever 91 in the first segment 40 to a second lever 92 in the second segment 50. A third pull rod 96 couples the second lever 92 in the second segment 50 to a third lever 93 in the third segment 60. A fourth pull rod 97 couples the third lever 93 in the third segment 60 to the fourth segment 70.

[0091] A proximal end of the first lever 94, spaced apart from the first lever 91, is mechanically connected to the handle 20 at a location spaced apart from the joint 26 between the handle 20 and the proximal end 32 of the spatula 30. The distal end of the pull rod 97, facing away from the third lever 93, is connected to the fourth link 70 at a location near the first side 34, spaced apart from the joint between the third link 60 and the fourth link 70. In the illustrated example, the first lever 91 is designed as a bent lever or angled lever, and the second lever 92 and the third lever 93 are designed as straight levers. The first lever 91, the second lever 92 and the third lever 93 are each hinged near the first side 34 of the spatula 30, which is in contact with the patient's tongue when used as intended, and thus spaced apart from the joints 46, 56, 66 on the second side 36 of the spatula 30.

[0092] The first lever 91, designed as an angled lever, causes a redirection of the force transmitted by the force transmission device 80. All levers 91, 92, 93, through varying distances of the coupling points of the tie rods 94, 95, 96, 97 from the pivot axes of the levers 91, 92, 93, each effect a translation of a first force and a first displacement proximal to the lever 91, 92, 93 into a second force and a second displacement distal to the lever 91, 92, 93. In the frictionless case, the ratio between the first force and the second force corresponds to the ratio between the second displacement and the first displacement. Pivoting movements of the links 40, 50, 60, 70 relative to each other and of the levers 91, 92, 93 relative to the links 40, 50, 60 and thus varying directions of pull of the drawbars 94, 95, 96, 97 can change the transmission ratios effected by the levers 91, 92, 93.

[0093] Translations using levers 91, 92, 93 or - deviating from the illustration in Figure 9 - by means of pulleys or other gears within the power transmission device 80, similar to the one based on the Figure 8 The laryngoscope shown can cause a pivoting movement of the handle 20 relative to the proximal end 32 of the blade 30 to have a varying influence on the curvature of the blade 30 along the blade 30. In other words, levers 91, 92, 93, 94 or other gears can cause a pivoting movement of the handle 20 relative to the proximal end 32 of the blade to affect the curvature of the blade 30 more or less strongly at a first joint 46, 56, 66 than at a second joint 46, 56, 66.

[0094] Figure 10 shows a schematic representation of a section through another laryngoscope 10, which in some features, properties and functions resembles the one based on the Figures 1 to 9 The laryngoscopes shown resemble the one depicted. The sectioning plane of the Figure 10 corresponds to the cutting planes of the Figures 2 to 9The following are, in particular, the characteristics, properties, and functions of the [product / service] in [location]. Figure 10 The laryngoscope shown in section 10 is described, in which it differs from those shown based on the Figures 1 to 9 The laryngoscopes shown differ.

[0095] The in Figure 10 The laryngoscope 10 shown is similar to the one based on the Figures 1 to 9The laryngoscopes shown comprise a handle 20 and a blade 30, the proximal end 32 of which is mechanically connected to the handle 20 by a joint 26. A first chain of links 140, 150, 160, 170 extends from a proximal section 40 of the blade 30 to the first side 34, which, when the laryngoscope 10 is used, rests against the patient's tongue. Furthermore, a second chain of links 240, 250, 260, 270 extends from the proximal section 40 of the blade 30 to the side 36, which, when the laryngoscope is used, faces the palate of the patient. The second chain of links 240, 250, 260, 270 is essentially parallel to the first chain of links 140, 150, 160, 170, with the distance between both chains decreasing distally. The most distal links 170, 270 are rigidly connected to each other at their distal ends and form the distal end 38 of the spatula 30.Joints are provided between the proximal section 40 of the spatula 30 and the links 140, 150, 160, 170, 240, 250, 260, 270, which in the illustrated example are designed as solid joints. Alternatively, and deviating from the illustration in Figure 10, the joints between the 140, 150, 160, 170, 240, 250, 260, 270 can be designed as positive-locking joints, for example with shafts or axle journals and corresponding bearing shells.

[0096] In the areas of the joints between adjacent links 140, 150, 160, 170, 240, 250, 260, 270, the links 140, 150, 160, 170, 240, 250, 260, 270 are further connected to each other by spacer components 350, 360, 370. Each end 351, 361, 371 of each spacer element 350, 360, 370 is connected by a hinge to the transition area between two adjacent links 140, 150, 160, 170 on the first side 34 of the spatula 30, and a second end 352, 362, 372 of each spacer element 350, 360, 370 is connected by a hinge to the transition area between two adjacent links 240, 250, 260, 270 on the second side of the spatula 30. The joints at the ends 351, 352, 361, 362, 371, 372 of the spacer components 350, 360, 370 are also designed as solid hinges in the example shown, but can be configured differently from the illustration in Figure 10for example, they may be designed as positive-locking joints with shafts or axle journals in corresponding bearing shells.

[0097] With a rigid design of the extremely distal segments 170, 270, deviations from the illustration in Figure 10 The joints between these and the extremely distal spacer component 370 are omitted.

[0098] Each spacer component 350, 360, 370 is provided with a guide device 358, 368, 378 in the form of an opening or eyelet in which the force transmission device 80 is arranged and guided. A guide device 48 is also provided at the distal end of the proximal section 40 of the spatula 30. In the example shown, for each spacer component 350, 360, 370, the ratio of the distance of the guide device 358, 368, 378 from the first end 351, 361, 371 of the spacer component 350, 360, 370 at the first side 34 of the spatula 30 and the distance of the guide device 358, 368, 378 from the second end 352, 362, 372 of the spacer component 350, 360, 370 at the second side 36 of the spatula 30 is different and distinct from the ratio of the distances of the guide device 48 at the distal end of the proximal section 40 of the spatula 30 from the first side 34 and from the second side 36 of the spatula 30.These different ratios of the distances mean that by pivoting the handle part 20 and the resulting movement of the force transmission device 80, a deformation of the spatula 30 can be caused.

[0099] In all cases based on the Figures 1 to 10 The number of segments in the laryngoscopes 10 shown may differ from the illustrations in the figures: 40, 50, 60, 70, 140, 150, 160, 170, 240, 250, 260, 270. Figures 7 to 10 In these laryngoscopes, the force transmission devices for transmitting pressure or shear forces to increase the curvature of the blade 30 may be designed. This is particularly relevant in the cases based on the Figures 7 to 9 The laryngoscopes 10 depicted the joints 46, 56, 66 between the limbs 40, 50, 60, 70 differing from the depictions in the Figures 7 to 9each not on the second side 36, but on the first side 34 of the spatula 30, similar to the one based on the Figures 5 and 6 laryngoscope shown. Reference sign

[0100] 10 Laryngoscope 20 handle part of the laryngoscope 10 26 Joint between the handle part 20 and the proximal end 32 of the blade 30 30 spatula of the laryngoscope 10 32 proximal end of the blade 30 34 side of the blade intended for application to the tongue and base of the tongue of a patient 30 36 side of the blade to be applied to the palate of a patient 30 38 distal end of the blade 30 40 first link of the spatula 30 or proximal section of the spatula 30 42proximal end of the first segment 40 44distal end of the first segment 40 46joint between the first segment 40 and the second segment 50 48guiding device on the first segment or the proximal section 40 for guiding the power transmission device 80 50 second member of the spatula 30 52 proximal end of the second link 50 54 distal end of the second link 50 56 joint between the second link 50 and the third link 60 58 guiding device on the second link 50 for guiding the power transmission device 80 60 third member of the spatula 30 62 proximal end of the third segment 60 64 distal end of the third segment 60 66 joint between the third segment 60 and the fourth segment 70 68 guiding device on the third segment 60 for guiding the power transmission device 80 70 fourth member of the spatula 30 72proximal end of the fourth segment 70 74distal end of the fourth segment 70 80 Power transmission deviceof the spatula 20 82 proximal end of the power transmission device 80 84 deflection device in the first link 40 85 solid joint between the deflection device 84 and the first link 40 87 distal end of the power transmission device 80 91 first lever 92 second lever 93 third lever 94 first drawbar 95 second drawbar 96 third drawbar 97 fourth drawbar 140 first link of a first chain of links 150 second link of the first chain of links 160 third link of the first chain of links 170 fourth link of the first chain of links 240 first link of a second chain of links 250 second link of the second chain of links 260 third link of the second chain of links 270 fourth link of the second chain of links 350 first spacer component of the spatula 30 351 first end of the first spacer component 350 352 second end of the first spacer component 350 358 guide device in the first spacer component 350 360 second spacer component of the spatula 30 361 first end of thesecond spacer component 360 362 second end of the second spacer component 360 368 guide device in the second spacer component 360 370 third spacer component of the spatula 30 371 first end of the third spacer component 370 372 second end of the third spacer component 370 378 guide device in the third spacer component 370

Claims

1. A blade (30) for an adaptable or adaptive laryngoscope (10), comprising: a proximal end (32), which is articulatedly connected or connectable to a handle part (20) for manually holding the laryngoscope (10); a distal end (38) for insertion into the throat of a patient; a first side (34) resting on the tongue of the patient during the intended use of the blade (30); a second side (36) facing the palate of the patient during the intended use of the blade (30), a plurality of rigid members (40, 50, 60, 70) which are arranged one after another in the longitudinal direction of the blade (30) and each of which extend from the first side (34) of the blade (30) to the second side (36) of the blade (30); a plurality of joints (46, 56, 66), wherein each of the plurality of joints (46, 56, 66) articulatedly connects two adjacent members (40, 50, 60, 70); a force transmitting mechanism (80) for transmitting a force, comprising a proximal end (82) and a distal end (87), wherein the distal end (87) of the force transmitting mechanism (80) is mechanically connected to the distal end (38) of the blade (30), wherein the force transmitting mechanism (80) can be moved between its distal end (87) and its proximal end (82) relative to members (40, 50, 60) of the blade (30) in the longitudinal direction of the force transmitting mechanism (80), wherein the proximal end (82) of the force transmitting mechanism (80) is mechanically coupled to the handle part (20) or is provided and designed to be mechanically coupled to the handle part (20) in such manner that the force transmitting mechanism (80) can be moved relative to the proximal end (32) of the blade (30) by pivoting the handle part (20) relative to the proximal end (32) of the blade, wherein the force transmitting mechanism (80) is flexible, characterised in that the force transmitting mechanism (80) is formed from an elastic material.

2. The blade (30) according to the preceding claim, in which either the force transmitting mechanism (80) is arranged near the first side (34) of the blade (30) and is designed to transmit a tensile force, and one or a plurality or all of the plurality of joints (46, 56, 66) are arranged near the second side (36) of the blade (30), or one or a plurality or all of the plurality of joints (46, 56, 66) are arranged near the first side (34) of the blade (30) and the force transmitting mechanism (80) is arranged near the second side (36) of the blade (30) and is designed to transmit a pressing force.

3. The blade (30) according to one of the preceding claims, in which one or a plurality or all of the plurality of members (40, 50, 60, 70) have an annular cross-section or a U-shaped cross-section or a C-shaped cross-section in relation to section planes orthogonal to the longitudinal direction of the blade (30).

4. The blade (30) according to the preceding claim, in which the force transmitting mechanism (80) is arranged within a cavity at least partially enclosed by one or a plurality or all of the plurality of members (40, 50, 60, 70).

5. The blade (30) according to one of the preceding claims, further comprising: a guide mechanism (48, 58, 68) in one of the plurality of members (40, 50, 60), for guiding the force transmitting mechanism (80).

6. The blade (30) according to one of the preceding claims, in which the guide mechanism (48, 58, 68) comprises a channel or an eyelet.

7. The blade (30) according to one of the preceding claims, further comprising: a deflecting mechanism (84) on which the force transmitting mechanism (80) rests or to which the force transmitting mechanism (80) is mechanically connected or which is part of the force transmitting mechanism (80), wherein the force transmitting mechanism (80) extends distally from the deflecting mechanism (84) in a first direction and proximally from the deflecting mechanism (84) in a second direction which differs from the first direction.

8. The blade (30) according to one of the preceding claims, in which the force transmitting mechanism (80) has a converting mechanism (84, 91, 92, 93) that converts a first force and a first path proximal from the converting mechanism (84, 91, 92, 93) into a second force and a second path distal from the converting mechanism (84, 91, 92, 93).

9. The blade (30) for an adaptive laryngoscope (10), comprising: a proximal end (32), which is connected or connectable to a handle part (20) for manually holding the laryngoscope (10); a distal end (38) for insertion into the throat of a patient; a first chain of a plurality of members (140, 150, 160, 170), which are arranged one after another in the longitudinal direction of the blade (30) and which are each articulatedly connected in pairs, which chain extends from the proximal end (32) to the distal end (38) of the blade (30); a second chain of a plurality of members (240, 250, 260, 270), which are arranged one after another in the longitudinal direction of the blade (30) and which are each articulatedly connected in pairs, which chain extends from the proximal end (32) to the distal end (38) of the blade (30); a plurality of spacer components (350, 360), each of which articulatedly connects a point on a member (150, 160) of the first chain to a point on a member (250, 260) of the second chain at a predetermined spacing, characterised in that the blade is formed with a force transmitting mechanism (80) for transmitting a force, comprising a proximal end (82) and a distal end (87), wherein the distal end (87) of the force transmitting mechanism (80) is mechanically connected to the distal end (38) of the blade (30), wherein the force transmitting mechanism (80) can be moved between its distal end (87) and its proximal end (82) relative to members (40, 50, 60, 70) of the blade (30) in the longitudinal direction of the force transmitting mechanism (80), wherein the force transmitting mechanism (80) is flexible, wherein the force transmitting mechanism is formed from an elastic material.

10. The blade (30) according to the preceding claims, further comprising: a guide mechanism (358, 368) on one of the plurality of spacer components (350, 360), for guiding the force transmitting mechanism (80).

11. The blade (30) according to the preceding claims, in which a first guide mechanism (358) for guiding the force transmitting mechanism (80) is provided on a first spacer component (350) of the plurality of spacer components (350, 360), a second guide mechanism (368) for guiding the force transmitting mechanism (80) is provided on a second spacer component (360) of the plurality of spacer components (350, 360), a first ratio between the spacing of the first guide mechanism (358) from a first end (351) of the first spacer component (350), which faces the assigned member (150) of the first chain, and the spacing of the first guide mechanism (358) from a second end (352) of the first spacer component (350), which faces the assigned member (250) of the second chain, is different from a second ratio between the spacing of the second guide mechanism (368) from a first end (361) of the second spacer component (360), which faces the assigned member (160) of the first chain, and the spacing of the second guide mechanism (368) from a second end (362) of the second spacer component (360), which faces the assigned member (260) of the second chain.

12. A laryngoscope (10) comprising: a blade (30) according to one of the preceding claims; a handle part (20), which is connected or connectable to the proximal end (32) of the blade (30).

13. The laryngoscope (10) according to the preceding claim, in which the proximal end (32) of the blade (30) is articulatedly connected or connectable to the handle part (20), the proximal end (82) of the force transmitting mechanism (80) is coupled or couplable to the handle part (20) in such manner that a tensile force or a pressing or shear force can be exerted on the force transmitting mechanism (80) by pivoting the handle part (20) relative to the proximal end (32) of the blade (30).