JP6173408B2 - Anesthetic misinjection prevention device and anesthetic misinjection prevention system - Google Patents

Description

  The present invention relates to an anesthetic misinjection preventing apparatus and an anesthetic misinjection preventing system for preventing a liquid volatile anesthetic from being erroneously injected into an anesthetic vaporizer that vaporizes a volatile anesthetic.

  An anesthetic system used for anesthetizing a patient incorporates an anesthetic vaporizer for vaporizing a volatile anesthetic and adjusting the concentration of the vaporized anesthetic gas. The anesthetic vaporizer includes a tank for storing a volatile anesthetic, and an anesthetic injection unit for injecting the volatile anesthetic into the tank from an anesthetic container in which the volatile anesthetic is accommodated. The anesthetic injection part is provided with a substantially cylindrical insertion port connected to the tank. The anesthetic container is provided with a mouth screw on the outer periphery of the mouth, and an injection adapter is attached using this mouth screw. The injection adapter is provided with a substantially cylindrical insertion portion that is inserted into the insertion port of the anesthetic injection portion.

  There are several types of volatile anesthetics such as sevoflurane, isoflurane, enflurane, halothane, etc., each having different characteristics such as boiling point, saturated vapor pressure, MAC (minimum alveolar concentration), etc. Therefore, in order to obtain an accurate concentration, a dedicated anesthetic vaporizer corresponding to each volatile anesthetic is required (for example, see Non-Patent Document 1). Therefore, it operates so that different kinds of volatile anesthetics may not be injected into the anesthetic vaporizer. In order to ensure proper operation in such medical facilities, infusion adapters and anesthetic vaporizers are associated with each type of volatile anesthetic, and volatile anesthesia that is compatible with anesthetic vaporizers. An anesthetic misinjection prevention system has been invented to prevent a volatile anesthetic different from a drug from being injected from an anesthetic container (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3). ).

  The anesthetic misinjection prevention system of Patent Document 1 is provided with a key that represents the type of volatile anesthetic by the width and the arrangement interval at the insertion portion of the injection adapter, and the key of the injection adapter is provided at the insertion port of the anesthetic injection portion. A keyway having a width and an arrangement interval suitable for the above is provided. As a result, when the key of the insertion portion is fitted to the keyway of the insertion port, the insertion portion can be inserted into the insertion port, so that erroneous injection of the volatile anesthetic can be prevented.

  The anesthetic misinjection prevention system of Patent Document 2 is provided with a polygonal key that represents the type of volatile anesthetic by the number of corners on the outer peripheral surface of the insertion portion of the injection adapter. The same number of comb-like key grooves as the number of corners are provided. And the insertion port of the anesthetic injection part is provided with a polygonal keyhole adapted to the polygonal key of the injection adapter and a comb-like key adapted to the comb-like keyway. As a result, the insertion part can be inserted into the insertion port when the polygonal key and the comb-like keyway of the insertion unit are fitted to the polygonal keyhole and the comb-like key of the insertion port. Incorrect injection of drugs can be prevented.

  The anesthetic misinjection prevention system of Patent Document 3 is provided with a cylindrical member that is rotatable around the central axis of the insertion portion at the insertion portion of the injection adapter, and the type of volatile anesthetic is provided on the outer peripheral surface of the cylindrical member. Keys represented by the number of arrangement and the arrangement interval are provided. And the key slot which adapts the key of an injection | pouring adapter is provided in the insertion port of the anesthetic injection part. As a result, when the key of the insertion portion is fitted to the keyway of the insertion port, the insertion portion can be inserted into the insertion port, so that erroneous injection of the volatile anesthetic can be prevented.

US Pat. No. 6,929,041 US Pat. No. 7,287,561 US Published Patent No. 2008/0308179

Masahiro Michino, Shuji Toi, “Special Feature: Current Status and Prospects of General Anesthesia Machine, Vaporizer”, Medical Device Science, Japan Society for Medical Device Science, 2005, Vol.75, No.8

  The anesthetic misinjection prevention system of Patent Document 1 is provided with a convex portion indicating the direction of the key on the outer peripheral surface of the injection adapter. When the insertion portion is inserted into the insertion port with the convex portion facing upward, The key of the part matches the keyway. However, in this anesthetic misinjection prevention system, the convex portion of the injection adapter must be confirmed visually or by tactile sense, and the anesthetic container must be oriented so that the convex portion faces upward. turn into. In addition, an operator who does not know to insert the injection adapter with the convex part of the injection adapter facing upward will insert the insertion part into the insertion slot and then use the anesthetic agent until the key of the insertion part matches the keyway of the insertion slot. In some cases, the container was rotated, the injection adapter was loosened, and the volatile anesthetic leaked from the anesthetic container.

  Similarly, the anesthetic misinjection prevention system of Patent Document 2 also confirms that the polygon key and the comb-like key groove of the injection adapter coincide with the polygon key hole and the comb-like key of the anesthetic injection part. Since the positions must be aligned, the injection work becomes complicated. Further, when the anesthetic agent container is rotated by inserting the insertion portion into the insertion port without aligning the key or the like, the attachment of the injection adapter is loosened and volatilized in the same manner as the anesthetic misinjection prevention system of Patent Document 1. Sexual anesthetics leak.

  On the other hand, the anesthetic misinjection prevention system of Patent Document 3 can rotate the cylindrical member of the injection adapter to align the key with the key groove, so that the attachment of the injection adapter is loosened and the volatile anesthetic leaks. There is no. However, in this system, since the small cylindrical member at the tip of the injection adapter must be rotated so that the key and the key groove coincide with each other, the complexity of the injection operation cannot be eliminated.

  In order to solve the above problems, the present invention provides an anesthetic misinjection prevention device capable of preventing leakage of a volatile anesthetic from an anesthetic container and easily performing a volatile anesthetic injection operation, and an anesthesia An object is to provide a medicine injection prevention system.

In order to solve the above-mentioned problem, the invention according to claim 1 is provided in an anesthetic vaporizer that vaporizes a volatile anesthetic, and has a different volatile property from a volatile anesthetic compatible with the anesthetic vaporizer. An anesthetic misinjection prevention device for preventing an anesthetic from being injected from an anesthetic container. The anesthetic erroneous injection prevention apparatus comprises a body portion having an insertion opening of the substantially cylindrical shape, and the identification annular member held by the main body portion so as to be rotatable about the central axis of the interpolation inlet, the identification member One of a plurality of keys or key grooves indicating the type of volatile anesthetic that is provided on the inner diameter portion and fits the anesthetic vaporizer is arranged at equal intervals, and the width of the key or key groove is the key or key A first identification portion that is wider than the width of the portion where no groove is provided . On the outer peripheral surface of the substantially cylindrical insertion portion of the injection adapter attached to the mouth of the anesthetic agent container, one of a plurality of keys or key grooves indicating the type of volatile anesthetic in the anesthetic agent container is the same A second identification portion is provided which is disposed at intervals and has a key or key groove whose width is wider than that of a portion where no key or key groove is provided. Distal end of the insertion portion, when inserted into the inner diameter portion through the insertion opening, the key or key groove of the first identification portion and the key or keyway of the second identification portion abuts, keys and by either or slope provided on both the keyway, the first identification of the key or keyway is second identification portion of the key or around the central axis of the insertion opening pushed identification member with the key groove Therefore, the first identification unit is aligned with the second identification unit. Further, when the shape of the key or keyway of the first identification unit and the key or keyway of the second identification unit match, the insertion unit is received in the insertion slot, and the key or keyway of the first identification unit is received. When the shape of the key or keyway of the second identification portion does not match, the insertion portion is prevented from being inserted into the insertion slot.

The invention according to claim 2 is provided in an anesthetic vaporizer that vaporizes a volatile anesthetic, and a volatile anesthetic different from the volatile anesthetic suitable for the anesthetic vaporizer is injected from an anesthetic container. An anesthetic misinjection prevention device for preventing the anesthetic from occurring and an infusion adapter attached to the mouth of the anesthetic container for injecting a volatile anesthetic from the anesthetic misinjection prevention device. An injection prevention system. Anesthetic erroneous injection prevention device includes a main body insertion opening of the substantially cylindrical shape is provided with the insertion portion of the injection adapter is inserted, held by the main body portion so as to be rotatable about the central axis of the interpolation inlet An annular identification member and a plurality of keys or key grooves that are provided on the inner diameter portion of the identification member and indicate the type of volatile anesthetic suitable for the anesthetic vaporizer are arranged at equal intervals. Alternatively, a first identification portion is provided in which the width of the key groove is wider than the width of the portion where the key or key groove is not provided . In addition, the injection adapter is provided on a substantially cylindrical insertion portion to be inserted into the insertion port, and an outer peripheral surface of the insertion portion, and includes any one of a plurality of keys or key grooves indicating the type of volatile anesthetic in the anesthetic agent container. The other is arranged at equal intervals, and the width of the key or key groove is made larger than the width of the portion where the key or key groove is not provided . When the distal end of the insertion portion is inserted into the inside diameter portion through the insertion opening, the key or key groove of the first identification portion and the key or keyway of the second identification portion abuts, key and keyway The key or key groove of the first identification unit is pushed by the key or key groove of the second identification unit , and the identification member rotates around the central axis of the insertion slot. Therefore, the first identification unit is aligned with the second identification unit. Further, when the shape of the key or keyway of the first identification unit and the key or keyway of the second identification unit match, the insertion unit is received in the insertion slot, and the key or keyway of the first identification unit is received. When the shape of the key or keyway of the second identification portion does not match, the insertion portion is prevented from being inserted into the insertion slot.

According to the first and second aspects of the present invention, when the distal end of the insertion portion of the injection adapter is inserted into the insertion port of the anesthetic misinjection prevention device, the key or the key groove provided on the inner diameter portion of the identification member a first identification part comprising a either in contact with the second identification portion consisting of the other one of the key or key groove provided on the outer peripheral surface of the insertion portion is brought, one of the key and keyway or By the slopes provided on both, the key or keyway of the first identification unit is pushed by the key or keyway of the second identification unit , and the identification member rotates around the central axis of the insertion slot. The first identification unit is aligned with the identification unit. Identification member, when the shape of the first identification portion of the key or keyway and the key or the key groove of the second identifying unit match, accept the insertion portion into the insertion opening, the key of the first identification portion or When the keyway and the key of the second identification part or the shape of the keyway do not match, insertion of the insertion part into the insertion slot is blocked.

Table The invention according to claim 3, by the anesthetic erroneous injection prevention system according to claim 2, keys and keyways, width type of volatile anesthetics also may at least one of the arrangement number properly and wherein the score.

According to a fourth aspect of the present invention, in the anesthetic misinjection prevention system according to the second or third aspect, the inclined surface is provided on the end surface of the key, and the identification member is arranged around the central axis of the insertion port. A first slope that rotates in a direction, and a second slope that tilts in a direction different from the first slope and rotates the identification member in a second direction opposite to the first direction. To do.

According to the first and second aspects of the present invention, when the insertion portion of the injection adapter is inserted into the insertion port of the anesthetic misinjection prevention device , either the key or the key groove provided on the inner diameter portion of the identification member a first identification part comprising a one, and a second identification portion consisting of the other one of the key or key groove provided on the outer peripheral surface of the insertion portion abuts on either one or both of the keys and keyways The first identification unit is pushed by the second identification unit by the provided slope, the identification member rotates around the central axis of the insertion port, and the first identification unit is aligned with the second identification unit. The insertion part can be inserted into the insertion port without rotating the anesthetic container. Thereby, since the attachment of the injection adapter is not loosened, the leakage of the volatile anesthetic can be prevented. Also,
Since the width of the key or the key groove is wider than the width of the portion where the key or the key groove is not provided, when the injection adapter is inserted into the anesthetic misinjection prevention device, the second identification of the insertion portion is performed. Since it is not necessary to align the part and the first identification part of the insertion port, the operation of injecting the volatile anesthetic becomes simple.

  According to the invention described in claim 3, since either one of the first identification part and the second identification part is used as a key and the other is used as a key groove, various conditions such as the shape of the insertion part and the insertion port can be used. Accordingly, it is possible to arbitrarily select which of the key and the keyway is provided. Therefore, the degree of freedom in designing the injection adapter and the anesthetic misinjection prevention device is improved, and an anesthetic misinjection prevention system that facilitates the injection operation can be provided.

  According to the invention described in claim 4, since the first inclined surface rotated in the first direction and the second inclined surface rotated in the second direction are provided, the rotation is performed along the inclined surface in only one direction. Compared to the case, the rotation amount of the identification member is reduced. Therefore, since the positioning of the first identification unit and the second identification unit by the rotation of the identification member can be performed in a short time, the injection operation can be performed quickly.

Further, key and keyway. Thus arranging a plurality at equal intervals around the central axis of the insertion portion or the insertion opening, the second identification portion any position of the injection adapter erroneous anesthetic injection Even when it is inserted into the insertion port of the prevention device, the identification member can be quickly positioned.

It is a perspective view which shows the structure of the anesthetic agent injection failure prevention system. It is an external appearance perspective view of anesthetic injection prevention. It is sectional drawing which shows the structure of anesthetic anesthetic injection prevention. It is an external appearance perspective view of an injection adapter. It is a top view of an injection adapter. It is sectional drawing which shows the structure of an injection adapter. It is sectional drawing which shows the state which inserted the insertion part of the injection | pouring adapter into the insertion port of an anesthetic medicine misinjection prevention. It is a top view which shows the injection adapter and the other example of an identification member. It is a perspective view which shows the insertion relationship of the insertion part of an injection | pouring adapter, and an identification member. It is a top view of the injection adapter and identification member of a 2nd embodiment. It is a top view of the injection | pouring adapter and identification member at the time of making a key and a keyway into one.

(Embodiment 1)
The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is a perspective view showing an anesthetic misinjection prevention system 1 according to the present embodiment. The anesthetic misinjection prevention system 1 includes an anesthetic misinjection prevention device 3 provided in the anesthetic vaporizer 2 and an injection adapter 5 attached to the mouth 41 of the anesthetic container 4. The anesthetic vaporizer 2 is a device for vaporizing the volatile anesthetic 6 stored in the tank 21 and adjusting the concentration of the vaporized anesthetic gas, and is incorporated in an anesthesia system used for anesthetizing a patient. .

  The anesthetic misinjection prevention device 3 is provided with a substantially cylindrical insertion port 31 connected to the tank 21. The anesthetic container 4 is provided with a mouth screw 411 (see FIG. 4) on the outer periphery of the mouth 41, and the injection adapter 5 is attached using this mouth screw 411. The injection adapter 5 includes a substantially cylindrical insertion portion 51 that is inserted into the insertion port 31 of the anesthetic misinjection prevention device 3. The volatile anesthetic 6 in the anesthetic agent container 4 is injected into the tank 21 from the anesthetic agent container 4 via the anesthetic agent injection preventing device 3 when the insertion portion 51 is inserted into the insertion port 31.

  FIG. 2 is a perspective view showing the external shape of the anesthetic misinjection preventing apparatus 3, and FIG. 3 is a cross-sectional view showing the configuration of the anesthetic misinjection preventing apparatus 3. The anesthetic misinjection preventing device 3 includes a substantially cylindrical main body 32 provided with an insertion port 31 and an identification member 33 accommodated in the main body 32.

  The main body 32 includes a cylindrical tubular member 321, an intermediate member 322 fitted to the tubular member 321, a valve mechanism 323 incorporated between the tubular member 321 and the intermediate member 322, and a distal end of the intermediate member 322. And a lid member 324 to be screwed together.

  The cylindrical member 321 is provided with a plurality of holes 321 a for allowing the volatile anesthetic 6 to flow into the tank 21 on the bottom surface, and an opening 321 b into which the intermediate member 322 is fitted is provided at the top. Yes. The cylindrical member 321 is fitted to the anesthetic vaporizer 2 together with the intermediate member 322.

  The intermediate member 322 has a substantially cylindrical shape, and an insertion port 31 is provided therein. In the insertion port 31, there are provided an opening protrusion 322a for opening the valve mechanism 54 (see FIG. 6) of the injection adapter 5 and a plurality of holes 322b for allowing the anesthetic 6 to flow into the cylindrical member 321. ing. Further, on the outer peripheral surface of the intermediate member 322, there are a male screw 322c into which the lid member 324 is fitted, and a groove portion 322e in which an O-ring 322d for providing a sealing property between the anesthetic vaporizer 2 is fitted. Is provided. A fitting portion 322f to be fitted into the opening 321b of the cylindrical member 321 is provided at the lower portion of the intermediate member 322. On the outer peripheral surface of the fitting portion 322f, a groove portion 322h into which an O-ring 322g for providing a sealing property with the cylindrical member 321 is fitted is provided.

  The valve mechanism 323 includes a valve body 323a, a pin 323b erected on the upper surface of the valve body 323a, a spring 323c that presses the valve body 323a against the intermediate member 322, and an inner peripheral surface of the fitting portion 322f. And an O-ring 323d. The valve main body 323a has a substantially disk shape, and the edge of the upper surface is chamfered according to the inner peripheral surface of the fitting portion 322f, and an O-ring 323d is fitted therein. The pin 323 b has a substantially cylindrical shape, and protrudes into the insertion port 31 through the bottom surface of the intermediate member 322.

  The lid member 324 has a substantially cylindrical shape provided with an opening 324a for opening the insertion port 31 on the upper surface, and a female screw 324b into which the male screw 322c of the intermediate member 322 is screwed is formed on the inner peripheral surface. Is provided.

  The identification member 33 has a substantially annular shape, is accommodated in a space formed between the intermediate member 322 and the lid member 324, and can be rotated around the central axis of the insertion port 31. 32. A keyway (first identification portion) 331 representing the type of the volatile anesthetic 6 that is compatible with the anesthetic vaporizer 2 is provided on the inner diameter portion of the identification member 33. The illustrated identification member 33 corresponds to, for example, sevoflurane, and five key grooves 331 are arranged at equal intervals in the circumferential direction.

  FIG. 4 is a perspective view showing the external shape of the injection adapter 5, FIG. 5 is a plan view of the injection adapter 5, and FIG. 6 is a cross-sectional view showing the configuration of the injection adapter 5. The injection adapter 5 includes a substantially cylindrical base portion 52 provided with an internal thread 52 a that is screwed into the mouth screw 411 of the anesthetic container 4, and an insertion portion 51 provided on the upper portion of the base portion 52. At the lower end of the base 52, a notch 52 b is provided that represents the type of the corresponding volatile anesthetic 6 by the width and the arrangement interval. On the outer periphery of the mouth 41 of the anesthetic container 4, a ring-shaped collar 42 provided with protrusions 42a with a width and an arrangement interval corresponding to the notch 52b of the injection adapter 5 is attached. The infusion adapter 5 is adapted to be attached to the anesthetic container 4 when the notch 52b coincides with the projection 42a of the collar 42, so that the infusion adapter 5 contains an incompatible type of volatile anesthetic 6 therein. Can be prevented.

  An O-ring 511 is attached to the distal end side of the insertion portion 51 for providing a sealing property with the insertion port 31 when inserted into the insertion port 31. A plurality of keys (second identification portions) 512 representing the type of the compatible volatile anesthetic 6 are provided on the outer peripheral surface on the base side of the insertion portion 51. The illustrated injection adapter 5 corresponds to, for example, sevoflurane, and five keys 512 are arranged at equal intervals in the circumferential direction. At the end of the key 512, there is provided a slope 513 that contacts the key groove 331 and rotates the identification member 33 when inserted into the insertion slot 31. In FIG. 4, the slope 513 includes a first slope 513a that rotates the identification member 33 counterclockwise (first direction) and a second slope 513b that rotates clockwise (second direction). It is configured. The first inclined surface 513a and the second inclined surface 513b are provided so that the end of the key 512 has a substantially mountain shape.

  The identification member 33 receives the insertion portion 51 in the insertion port 31 when the shape of the key groove 331 matches the shape of the key 512 of the insertion portion 51. On the contrary, when the keyway 331 and the shape of the key 512 of the insertion portion 51 do not match, the identification member 33 prevents the insertion portion 51 from being inserted into the insertion port 31.

  A passage 53 for the anesthetic 6 is provided in the insertion portion 51 and the base portion 52. A valve mechanism 54 that opens and closes the passage 53 is provided in the passage 53. The valve mechanism 54 includes a valve main body 541, a spring 542, and a spring receiving member 543. The valve main body 541 includes a disk portion 541 a that abuts on a stepped portion 531 provided in the passage 53, and a guide rod 541 b provided in the lower portion of the disk portion 541 a, and is inserted into the passage 53. . The spring 542 is disposed on the outer periphery of the guide rod 541b and presses the valve main body 541 against the stepped portion 531. The spring receiving member 543 is fixed in the base portion 52 to receive the lower end of the spring 542 and guides the guide bar 541b.

  The valve mechanism 323 normally closes the insertion port 31 by causing the valve body 323a to come into close contact with the intermediate member 322 by the bias of the spring 323c. Further, the valve mechanism 54 also closes the passage 53 when the valve main body 541 is brought into close contact with the stepped portion 531 by urging of the spring 542 in a normal state. As shown in FIG. 7, in the valve mechanism 323, when the insertion portion 51 of the injection adapter 5 is inserted into the insertion port 31 and the pin 323b is pushed by the insertion portion 51, the valve body 323a resists the bias of the spring 323c. And move in the axial direction to open the insertion port 31. Further, when the valve main body 541 is pushed by the opening protrusion 322 a inserted into the passage 53 when the insertion portion 51 is inserted into the insertion port 31, the valve main body 541 resists the bias of the spring 542. And move in the axial direction to open the passage 53.

  FIG. 8 is a plan view of an injection adapter 5A corresponding to a volatile anesthetic other than sevoflurane and an identification member 33A. The injection adapter 5A and the identification member 33A shown in FIG. 5A are provided with three keys 512A and a key groove 331A, and correspond to, for example, isoflurane. In addition, the injection adapter 5B and the identification member 33B shown in FIG. 5B are provided with four keys 512B and a key groove 331B, and correspond to, for example, enflurane. Similarly, the injection adapter 5C and the identification member 33C shown in FIG. 3C include six keys 512C and a key groove 331C, and correspond to, for example, halothane. The width of the key 512 and the key groove 331 is changed according to the number so that the identification member 33 is immediately rotated by the inclined surface 513 when the insertion portion 51 is inserted into the insertion port 31. Yes. That is, the width of the key 512 and the key groove 331 becomes narrower as the number increases, and becomes wider as the number decreases. As described above, the injection adapter 5 and the identification member 33 are associated with a plurality of types of volatile anesthetics 6 according to the number and width of the key 512 and the key groove 331.

  Next, the operation of the above embodiment will be described. When injecting the volatile anesthetic 6 into the anesthetic vaporizer 2, the compatible injection adapter 5 is attached to the anesthetic container 4 in which the volatile anesthetic 6 compatible with the anesthetic vaporizer 2 is accommodated. The base 52 of the infusion adapter 5 and the collar 42 of the anesthetic container 4 are provided with a notch 52b and a protrusion 42a representing the type of volatile anesthetic 6 to be matched by the width and the arrangement interval. Since the notch 52b and the projection 42a coincide with each other, they can be attached to the anesthetic agent container 4, so that attachment errors can be prevented.

  Next, the anesthetic container 4 is held, and the insertion portion 51 of the injection adapter 5 is inserted into the insertion port 31 of the anesthetic misinjection prevention device 3. As shown in FIG. 9, the key 512 provided on the outer peripheral surface of the insertion portion 51 abuts on the identification member 33 in the insertion port 31, and presses the key groove 331 by the inclined surface 513 of the key 512 to move the identification member 33. Rotate clockwise or counterclockwise.

  The identification member 33 receives the insertion portion 51 in the insertion port 31 when the shape of the key groove 331 matches the shape of the key 512 of the insertion portion 51. As a result, the valve mechanism 323 of the insertion port 31 and the valve mechanism 54 of the insertion portion 51 are opened, so that the volatile anesthetic 6 in the anesthetic agent container 4 flows into the tank 21 via the anesthetic misinjection prevention device 3. To do.

  On the other hand, if the key groove 331 and the shape of the key 512 of the insertion portion 51 do not match, the identification member 33 prevents the insertion portion 51 from being inserted into the insertion port 31, so that the volatilization is not suitable. Mixing of the volatile anesthetic 6 due to the injection of the sexual anesthetic 6 can be prevented.

  As described above, according to the anesthetic misinjection prevention system 1 of the present embodiment, when the insertion portion 51 of the injection adapter 5 is inserted into the insertion port 31 of the anesthetic misinjection prevention device 3, the insertion portion Since the identification member 33 is rotated by the inclined surface 513 of the 51 key 512, the insertion portion 51 can be inserted into the insertion port 31 without rotating the anesthetic agent container 4. Thereby, since the attachment of the injection adapter 5 is not loosened, leakage of the volatile anesthetic 6 can be prevented. Further, when the injection adapter 5 is inserted into the anesthetic misinjection prevention device 3, it is not necessary to align the key 512 of the insertion portion 51 and the key groove 331 of the insertion port 31, so that the injection of the volatile anesthetic 6 is performed. Work becomes easy.

  Further, a first slope 513a for rotating the identification member 33 counterclockwise (first direction) and a second slope 513b for rotating clockwise (second direction) on the key 512 of the insertion portion 51, Therefore, the amount of rotation of the identification member 33 is reduced as compared with the case of rotating along a slope in only one direction. Therefore, the key 512 and the key groove 331 are aligned in a short time by the rotation of the identification member 33, so that the injection operation can be performed quickly.

  Further, since a plurality of the keys 512 and the key grooves 331 are arranged at equal intervals around the central axis of the insertion portion 51 or the insertion port 31, the position of the key 512 of the injection adapter 5 at the insertion port 31 is determined. Even when inserted, the positioning of the identification member 33 is quickly performed.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In addition, about the same component as 1st Embodiment, detailed description is abbreviate | omitted using a same sign. In contrast to the first embodiment, the injection adapter 5D and the identification member 33D shown in FIG. 10 are provided with a plurality of key grooves 514D in the insertion portion 51 and a plurality of keys 332D in the identification member 33D. The key 332D of the identification member 33D is provided with a slope 333 including a first slope 333a and a second slope 333b. As described above, even if the portions where the key and the keyway are provided are reversed, the same operation and effect as in the first embodiment can be obtained.

  According to this embodiment, it is possible to arbitrarily select which of the key and the key groove is provided according to various conditions such as the shapes of the insertion portion 51 and the insertion port 31. Accordingly, the degree of freedom in designing the injection adapter 5 and the anesthetic misinjection prevention device 3 is improved, and the anesthetic misinjection prevention system 1 that facilitates the injection operation can be provided.

  In the first and second embodiments, a plurality of keys and key grooves are provided at equal intervals in the circumferential direction. However, like the injection adapter 5E and the identification member 33E shown in FIG. One keyway 331E may be provided one by one, and the type of the volatile anesthetic 6 may be identified by the width dimension of the key 512E and the keyway 311E. In this case, in order to facilitate the alignment of the key groove 311E with respect to the key 512E, for example, a notch 334E is formed on the outer peripheral edge of the identification member 33E, and the notch 334E is provided on the end surface of the intermediate member 322. It is preferable to insert a restriction pin 322j to restrict the rotation range of the identification member 33E.

  As mentioned above, although each embodiment of this invention has been described in detail, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the scope of this invention, It is included in this invention. For example, the present invention can be applied to an anesthetic misinjection prevention system having a configuration as described in Patent Documents 1 to 3. In each of the above embodiments, the key is provided with a slope, but the slope may be provided in both the key and the key groove, and the identification member may be rotated by bringing the slopes into contact with each other. . According to this, the slopes come into sliding contact with each other, so that the identification member can be rotated more smoothly.

DESCRIPTION OF SYMBOLS 1 Anesthetic wrong injection prevention system 2 Anesthetic vaporizer 3 Anesthetic wrong injection prevention device 4 Anesthetic agent container 5 Injection adapter 6 Volatile anesthetic 31 Insertion port 33 Identification member 51 Insertion part 331 Keyway (1st identification part)
512 key (second identification part)
513 slope

Claims (4)

An anesthetic vaporizer for vaporizing a volatile anesthetic is provided to prevent a volatile anesthetic of a different type from a volatile anesthetic compatible with the anesthetic vaporizer from being injected from an anesthetic container. An anesthetic drug injection prevention device,
A main body having a substantially cylindrical insertion port;
An annular identification member held by the main body portion so as to be rotatable about the central axis of the front Symbol insertion opening,
One of a plurality of keys or key grooves provided on an inner diameter portion of the identification member and representing a type of volatile anesthetic suitable for the anesthetic vaporizer is disposed at equal intervals, and the key or the key groove A first identification portion whose width is wider than the width of the portion where the key or the keyway is not provided,
With
On the outer peripheral surface of the insertion portion having a substantially cylindrical shape of the injection adapter attached to the mouth of the anesthetic agent container, one of a plurality of keys or key grooves representing the type of the volatile anesthetic in the anesthetic agent container Are provided at equal intervals, and a second identification portion is provided in which the width of the key or the key groove is wider than the width of the portion where the key or the key groove is not provided,
When said distal end of the insertion portion is inserted into the inner diameter portion through the insertion port, and the first identification of the key or keyway and key or keyway of the second identification portion abuts the slope provided on one or both of said key and said keyway, said first identification section of the key or keyway is the second identification portion of the key or the identification member is pushed by the key groove Is rotated around the central axis of the insertion port, and the first identification unit is aligned with the second identification unit,
If the shape of the first identification portion of the key or keyway and said second identification parts of the key or keyway match accepts the insertion portion into the insertion opening, of the first identification portion If the shape of the key or keyway and said second identification parts of the key or keyway do not match, prevent the insertion of the insertion portion with respect to the insertion opening,
An anesthetic misinjection prevention device characterized by that. An anesthetic vaporizer for vaporizing a volatile anesthetic is provided to prevent a volatile anesthetic of a different type from a volatile anesthetic compatible with the anesthetic vaporizer from being injected from an anesthetic container. An anesthetic misinjection prevention system including an anesthetic misinjection prevention device and an injection adapter attached to the mouth of the anesthetic agent container to inject the volatile anesthetic from the anesthetic misinjection prevention device. And
The anesthetic misinjection prevention device is:
A main body provided with a substantially cylindrical insertion port into which the insertion portion of the injection adapter is inserted;
An annular identification member held by the main body portion so as to be rotatable about the central axis of the front Symbol insertion opening,
One of a plurality of keys or key grooves provided on an inner diameter portion of the identification member and representing a type of volatile anesthetic suitable for the anesthetic vaporizer is disposed at equal intervals, and the key or the key groove A first identification part having a width wider than a width of the part where the key or the keyway is not provided, and
The infusion adapter is
A substantially cylindrical insertion portion to be inserted into the insertion port;
One of a plurality of keys or key grooves provided on the outer peripheral surface of the insertion portion and indicating the type of volatile anesthetic in the anesthetic container is disposed at equal intervals, and the width of the key or the key groove Includes a second identification portion that is wider than the width of the portion where the key or the keyway is not provided ,
When said distal end of the insertion portion is inserted into the inner diameter portion through the insertion port, and the first identification of the key or keyway and key or keyway of the second identification portion abuts the slope provided on one or both of said key and said keyway, said first identification section of the key or keyway is the second identification portion of the key or the identification member is pushed by the key groove Is rotated around the central axis of the insertion port, and the first identification unit is aligned with the second identification unit,
When the shape of the key or keyway of the first identification unit and the key or keyway of the second identification unit match, the insertion unit is received in the insertion port, and the key of the first identification unit Alternatively, when the key groove and the key of the second identification part or the shape of the key groove do not match, the insertion of the insertion part into the insertion port is prevented,
An anesthetic misinjection prevention system characterized by that. Said key and said keyway width type of volatile anesthetic may properly is to table via at least one of arrangement number,
The anesthetic misinjection prevention system according to claim 2. The inclined surface is provided on an end surface of the key, and is inclined in a direction different from the first inclined surface, and a first inclined surface that rotates the identification member around the central axis of the insertion port in a first direction. A second inclined surface that rotates the identification member in a second direction opposite to the first direction,
The anesthetic misinjection prevention system according to claim 2 or 3.

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