Injector device for placing a subcutaneous infusion set

• US 20050124936A1
• Filed: 01/07/2005
• Published: 06/09/2005
• Est. Priority Date: 09/27/2001
• Status: Active Grant

• Current Assignee: Unomedical A/S
• Original Assignee: Unomedical A/S
• Inventors: Mogensen, Lasse Wesseltoft, Kornerup, Grete, Goransson, Magnus Walter
• Granted Patent: US 8,172,805 B2
• Time in Patent Office: Days
• US Class Current: 604/136
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 25/0631 having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

An injector device for transcutaneously placing at least a portion of a cannula of a medical device through the skin of a patient is provided. The injector device includes a device housing having a bore formed therein and a plunger slidably received within the bore. The plunger includes an insertion needle secured thereto for receiving the cannula of the medical device. The insertion needle remains secured to the plunger subsequent to placement of the medical device and the insertion needle and the injector are removable from the cannula while maintaining the transcutaneous placement of the cannula.

Claims

1-49. -49. (canceled)

50. An injector device for transcutaneously placing at least a portion of a cannula of a medical device through the skin of a patient, said injector device comprising:

a device housing having a bore formed therein; and

a plunger slidably received within said bore, said plunger having an insertion needle secured thereto for receiving said cannula of said medical device;

wherein said insertion needle remains secured to said plunger subsequent to placement of said medical device; and

said insertion needle and said injector are removable from said cannula while maintaining the transcutaneous placement of said cannula.

51. The injector device of claim 50 further comprising a drive for biasing said housing relative to said plunger.

52. The injector device of claim 51 wherein said drive biases said plunger toward an advanced position to transcutaneously place said cannula of said medical device.

53. The injector device of claim 51 wherein said drive comprises a spring.

54. The injector device of claim 51 wherein said drive comprises at least one flexible plastic strip extending around a portion of a periphery of said plunger, said at least one strip extending in a space between said plunger and said housing.

55. The injector device of claim 54 wherein said strip is integrally formed with said device housing.

56. The injector device of claim 51 wherein said drive urges said plunger from a retracted position to an advanced position for transcutaneous placement of said cannula.

57. The injector device of claim 50 wherein said device further comprises a removable cover at a forward end of said device housing for covering said insertion needle.

58. The injector device of claim 50 further comprising a retaining member for releasably retaining said plunger in a selected position relative to said housing.

59. The injector device of claim 58 wherein said retaining member releasably retains said plunger in a retracted position relative to said housing.

60. The injector device of claim 58 wherein said housing is deformable to release said retaining member.

61. The injector device of claim 60 wherein said housing is manually deformable to release said retaining member.

62. The injector device of claim 50 wherein said needle is substantially non-detachably secured to said plunger by press-fit.

63. The injector device of claim 50 wherein said housing includes a forward end defining a generally planar surface for placement against the skin of a patient.

64. The injector device of claim 50 wherein said medical device is a subcutaneous infusion set.

65. The injector device of claim 50 wherein said medical device is a sensor.

66. An injector device for transcutaneously placing at least a portion of a cannula of a medical device through the skin of a patient, said injector device comprising:

a device housing;

a carrier member adapted for sliding movement relative to said housing, said carrier member including a piercing member substantially non-detachably secured to said carrier member; and

a drive operably connected to said carrier member, said drive being adapted for urging sliding movement of said carrier member;

wherein said piercing member is adapted to receive said cannula of said medical device; and

wherein said piercing member remains substantially non-detachably secured to said carrier member subsequent to transcutaneous placement of said cannula and said piercing member is removable from said cannula while maintaining the transcutaneous placement of said cannula.

67. The injector device of claim 66 wherein said piercing member extends from said carrier member.

68. The injector device of claim 66 wherein said carrier member further comprises a recess formed at a forward end of said carrier member, said recess contoured to receive a portion of said medical device.

69. The injector device of claim 66 wherein said drive urges sliding movement of said carrier member from a retracted position to an advanced position.

70. The injector device of claim 66 further comprising a removable cover mountable on a portion of said housing.

71. The injector device of claim 66 wherein said piercing member comprises a needle.

72. The injector device of claim 66 further comprising a retaining member for releasably retaining said carrier member in a selected position relative to said housing.

73. The injector device of claim 72 wherein said housing is deformable to release said retaining member.

74. The injector device of claim 73 wherein said housing is manually deformable to release said retaining member.

75. The injector device of claim 66 wherein said drive comprises a spring.

76. The injector device of claim 66 wherein said drive comprises at least one flexible plastic strip extending around a portion of a periphery of said carrier member, said at least one strip extending in a space between said carrier member and said housing.

77. The injector device of claim 66 wherein said cannula is soft and flexible.

78. An injector device for transcutaneously placing at least a portion of a cannula of a medical device through the skin of a patient, said injector device comprising:

a generally cylindrically shaped housing having a cavity formed therein;

a carrier member adapted for at least partial reception in said cavity, said carrier member comprising at least one piercing member secured to said carrier member; and

a drive for urging movement of said carrier member relative to said housing;

wherein said drive extends at least partially around at least a portion of said carrier member, and

wherein said at least one piercing member is adapted to receive said medical device.

79. The injector device of claim 78 further comprising a removable cover connectable to said housing.

80. The injector device of claim 79 wherein said cover is repositionable on said housing for covering said at least one piercing member subsequent to removal of said medical device.

81. The injector device of claim 78 wherein said drive comprises a spring.

82. The injector device of claim 78 wherein said drive comprises at least one flexible plastic strip extending around a portion of a periphery of said carrier member, said at least one strip extending in a space between said carrier member and said housing.

83. The injector device of claim 78 wherein said drive urges said carrier member form a retracted position to an advanced position for placement of said medical device.

84. The injector device of claim 78 further comprising a retaining member for releasably retaining said carrier member in a selected position relative to said housing.

85. The injector device of claim 84 wherein in said retaining member retains said carrier member in a retracted position in said housing prior to transcutaneous placement of said medical device.

86. The injector device of claim 84 wherein said housing is deformable to release said retaining member.

87. The injector device of claim 86 wherein said housing is manually deformable to release said retaining member.

88. The injector device of claim 78 wherein said housing includes a forward end defining a generally planar surface for placement against the skin of a patient.

89. The injector device of claim 78 further comprising a recess formed at a forward end of said carrier member, said recess contoured to receive a portion of said medical device.

90. The injector device of claim 78 wherein said medical device is placed to the skin of the patient by positioning a forward end of said injector device on the skin and advancing said carrier member relative to said skin.

91. An injector device for transcutaneously placing at least a portion of a medical device through the skin of a patient, said injector device comprising:

a housing having a bore formed therein;

a carrier member at least partially received within said bore, said carrier member comprising at least one piercing member substantially non-detachably secured to said carrier member; and

a recess formed at a forward end of said plunger, said recess contoured to receive a portion of said medical device;

wherein said at least one piercing member is adapted to extend through at least a portion of said medical device when said medical device is received in said recess.

92. The injector device of claim 91 further comprising a drive mounted between said carrier member and said housing.

93. The injector device of claim 92 wherein said drive biases said carrier member relative to said housing.

94. The injector device of claim 92 wherein said drive biases said carrier member toward an advanced position for transcutaneous placement of said cannula.

95. The injector device of claim 91 further comprising a removable cover for mounting on said housing.

96. The injector device of claim 95 wherein said cover is repositionable on said housing to cover said at least one piercing member subsequent to removal of said medical device.

97. The injector device of claim 91 wherein said device is generally cylindrically shaped.

98. The injector device of claim 91 further comprising a retaining member for releasably retaining said carrier member in a selected position relative to said housing.

99. The injector device of claim 98 wherein said retaining member releasably retains said carrier member in a retracted position.

100. The injector device of claim 98 wherein said housing is deformable to release said retaining member.

101. The injector device of claim 100 wherein said housing is manually deformable to release said retaining member.

102. An injector device for transcutaneously placing at least a portion of a medical device through the skin of a patient, said injector device comprising:

a body having a cavity formed therein;

a carrier member at least partially received within said cavity, said carrier member comprising a piercing member substantially non-detachably secured thereto;

a drive for urging movement of said carrier member relative to said housing; and

a retaining member for releasably retaining said carrier member in a selected position relative to said housing until said patient activates said drive.

103. The injector device of claim 102 wherein said drive urges said carrier member from a retracted position to an advanced position.

104. The injector device of claim 102 wherein said retaining member releasably retains said carrier member in a retracted position.

105. The injector device of claim 104 wherein said body is deformable to release said retaining member.

106. The injector device of claim 105 wherein said body is manually deformable to release said retaining member.

107. The injector device of claim 102 wherein said body is generally cylindrically shaped.

108. The injector device of claim 102 further comprising a removable cover at a forward end of said body for covering said piercing member.

109. The injector device of claim 102 further comprising a recess formed at a forward end of said carrier member, said recess contoured to receive an upper part of said medical device.

110. The injector device of claim 102 wherein said medical device comprises a cannula adapted for reception by said piercing member for transcutaneous placement of said cannula.

111. The injector device of claim 110 wherein said piercing member is removable from said cannula while maintaining the transcutaneous placement of said cannula.

112. The injector device of claim 102 wherein said drive comprises a spring.

113. An injector device for transcutaneously placing at least a portion of a cannula of a medical device through the skin of a patient, said injector device comprising:

an insertion member substantially non-detachably secured to a carrier member, said insertion member being adapted for insertion within said cannula;

a cylindrical body for slidable reception of said carrier member within said cylindrical body, said cylindrical body having a forward end;

wherein said carrier member is advanced relative to said skin for placement of said medical device when said forward end is placed against the skin of a patient.

114. The injector device of claim 113 further comprising a drive for biasing said carrier member relative to said cylindrical body.

115. The injector device of claim 113 further comprising a removable cover at said forward end of said cylindrical body for covering said insertion member.

116. The injector device of claim 113 further comprising a retaining member for releasably retaining said carrier member in a position relative to said cylindrical body.

117. The injector device of claim 116 wherein said retaining member releasably retains said carrier member in a retracted position relative to said cylindrical body.

118. The injector device of claim 116 wherein said body is deformable to release said retaining member.

119. The injector device of claim 118 wherein said body is manually deformable to release said retaining member.

120. The injector device of claim 113 wherein said insertion member is substantially non-detachably secured to said carrier member by press-fit.

121. The injector device of claim 113 further comprising a recess formed at a forward end of said carrier member, said recess contoured to receive portion of said medical device.

122. A method of inserting at least a portion of a medical device through the skin of a patient, said method comprising:

providing a medical device;

providing an insertion device having a carrier body mounted for slidable movement at least partially with a body;

mounting said medical device on an insertion member, said insertion member being substantially non-detachably secured to said carrier body;

advancing said insertion member toward the skin of the patient for insertion of at least a portion of said insertion member and at least a portion of said medical device though the skin for placement of the medical device;

removing said insertion member and said carrier from said medical device while maintaining the placement of said medical device through the skin of the patient.

123. The method of claim 122 further comprising providing a drive for advancing said insertion member toward the skin of the patient.

124. The method of claim 122 wherein said body is cylindrical.

125. The method of claim 122 further comprising providing a retaining member for releasably retaining said carrier body in a selected position prior to advancing said insertion member towards the skin.

126. The method of claim 125 wherein said body is deformable to release said retaining member.

127. The method of claim 126 wherein said body is manually deformable to release said retaining member.