NEEDLE INSERTION ASSISTANCE DEVICE

• US 20080154198A1
• Filed: 02/05/2008
• Published: 06/26/2008
• Est. Priority Date: 02/05/2008
• Status: Active Grant

• Current Assignee: Deye Wei
• Original Assignee: Deye Wei
• Inventors: Wei, Deye
• Granted Patent: US 8,517,985 B2
• Time in Patent Office: Days
• US Class Current: 604/117
• CPC Class Codes: A61M 5/3287 Accessories for bringing the needle into the body; Automatic needle insertion A61M5/20, A61M5/31525 take precedence
• CPC Class Codes: A61M 5/329 characterised by features of the needle shaft
• CPC Class Codes: A61M 5/3293 characterised by features of the needle hub
• CPC Class Codes: A61M 5/427 Locating point where body is to be pierced, e.g. vein location means using ultrasonic waves, injection site templates
• CPC Class Codes: A61M 5/46 having means for controlling depth of insertion

Abstract

A needle insertion assistance device is provided to easily hold a needle device, which comprises a syringe and a needle having a needle wing and being attached to the syringe, in order to more reliably control the advancement of the needle during insertion of the needle into a targeted part of a human body for many medical purposes. One embodiment of the needle insertion assistance device may comprise a supporting plate, a base connected hingedly to a rear surface of the supporting plate, and a syringe holder securely affixed to a top surface of the base to slidably hold the syringe on the base and prevent the syringe from moving from side to side. This embodiment of the needle insertion assistance device may further include a needle blocker, a handle, and an angle adjusting assembly.

Claims

1. A needle insertion assistance device for use with a needle device, the needle device including a syringe and a needle that has a needle wing and is attached to the syringe, the needle insertion assistance device comprising

a base having a front end, a rear end, an underside, and a top surface having two sides, and a rear part, to support the needle device on the top surface;

a supporting plate having a front surface, and a rear surface to support the needle insertion assistance device and prevent unintentional forward advancement of the needle insertion assistance device;

a means for connecting the front end of the base to the rear surface of the supporting plate; and

a means for holding the syringe of the needle device on the base.

2. The needle insertion assistance device of claim 1 wherein

the base further includes a groove longitudinally furrowed in the top surface of the base;

and

whereby the groove is configured to act as a recess to hold a part of one side of the syringe of the needle device on the top surface of the base and is configured to act as a track for the syringe of the needle device to advance in a straight line.

3. The needle insertion assistance device of claim 2 wherein

the base has a longitudinal length, and a thickness;

and wherein the groove has a length from about half of the longitudinal length of the base to the longitudinal length of the base, a depth from about half one millimeter to the thickness of the base, and a width smaller than the diameter of the syringe, in order to hold a part of one side of the syringe on the top surface of the base and act as a track for the syringe of the needle device to advance in a straight line.

4. The needle insertion assistance device of claim 1 wherein

the means for holding the syringe of the needle device on the base includes at least one syringe holder securely affixed to the rear part of the top surface of the base;

and

whereby the syringe holder is configured to hold the syringe of the needle device on the base to allow the syringe, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

5. The needle insertion assistance device of claim 4 wherein

the syringe holder comprises at least two syringe holding plates securely affixed to the rear part of the top surface of the base, and on both sides of the groove respectively;

whereby the syringe holding plates hold the syringe of the needle device on the base and between the syringe holding plates to allow the syringe, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

6. The needle insertion assistance device of claim 1 wherein

the means for connecting the front end of the base to the rear surface of the supporting plate includes at least one hinge that allows the base to rotate with respect to the supporting plate to form different angles with respect to the supporting plate.

7. The needle insertion assistance device of claim 1 further comprising

a handle securely affixed to the underside of the base;

wherein the needle insertion assistance device has a size; and

whereby the handle increases the size of the needle insertion assistance device and facilitates handling and hand-held usage of the needle insertion assistance device by a human being.

8. The needle insertion assistance device of claim 7 wherein

the handle further includes a sloping bottom, a sloping front, and at least one notch to facilitate handling and hand-held usage of the needle insertion assistance device by a human being.

9. The needle insertion assistance device of claim 1 further comprising

a needle blocker including

a screw bolt having two ends,

a screw nut screwed on the screw bolt, and

at least one screw support securely affixed to one end of the screw bolt and securely affixed to one side of the top surface of the base to support the screw bolt and the screw nut over the side of the top surface of the base;

and

whereby the screw nut prevents the needle device from advancing forward by blocking the needle wing of the needle device from advancing forward beyond a location of the screw nut.

10. The needle insertion assistance device of claim 1 further comprising

a means for stopping rotation of the base with respect to the supporting plate to fix an angle of the base with respect to the supporting plate to stabilize an angle at which the needle is inserted into a human body.

11. The needle insertion assistance device of claim 10 wherein

the means for stopping rotation of the base with respect to the supporting plate includes an angle adjusting assembly having two ends, and pivotally connected to the rear surface of the supporting plate at one end and slidably connected to the base at another end.

12. The needle insertion assistance device of claim 11 wherein

the angle adjusting assembly further includes

an arm support securely affixed to the base,

an arm screw, and

an arm having a sliding gap, and two ends, one end of the arm pivotally connected to the rear surface of the supporting plate and another end of the arm slidably connected to the base by the arm support and the arm screw with the arm screw inserted through the sliding gap of the arm and then screwed into the arm support so that the arm can slide with respect to the arm support and the base over the arm screw;

whereby the arm is able to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a loose state, and unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a tight state; and

whereby the base is unable to rotate with respect to the supporting plate if the arm is unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into the tight state.

13. The needle insertion assistance device of claim 1 wherein

the supporting plate further includes an upper part, and at least one needle gap situated at the upper part of the supporting plate for the needle to pass through the supporting plate.

14. The needle insertion assistance device of claim 1 wherein

the base further includes at least one set of ruler marks marked on the top surface of the base to indicate how far the needle advances with each attempt of advancement.

15. A needle insertion assistance device for use with a needle device, the needle device including a syringe and a needle that has a needle wing and is attached to the syringe, the needle insertion assistance device comprising

a base having a front end, a rear end, an underside, and a top surface having two sides, and a front part, to support the needle device on the top surface;

a supporting plate having a front surface, and a rear surface to support the needle insertion assistance device and prevent unintentional forward advancement of the needle insertion assistance device;

a means for connecting the front end of the base to the rear surface of the supporting plate; and

a means for holding the needle of the needle device on the base.

16. The needle insertion assistance device of claim 15 wherein

the means for holding the needle of the needle device on the base includes a needle holder having a needle slot to hold the needle and being securely affixed to the front part of the top surface of the base;

and

whereby the needle holder holds the needle of the needle device in the needle slot over the base to allow the needle, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

17. The needle insertion assistance device of claim 15 wherein

the base further includes a groove longitudinally furrowed in the top surface of the base;

and

whereby the groove is configured to act as a recess to hold a part of one side of the syringe of the needle device on the top surface of the base and is configured to act as a track for the syringe of the needle device to advance in a straight line.

18. The needle insertion assistance device of claim 17 wherein

the base has a longitudinal length, and a thickness;

and wherein the groove has a length from about half of the longitudinal length of the base to the longitudinal length of the base, a depth from about half one millimeter to the thickness of the base, and a width smaller than the diameter of the syringe, in order to hold a part of one side of the syringe on the top surface of the base and act as a track for the syringe of the needle device to advance in a straight line.

19. The needle insertion assistance device of claim 15 wherein

the means for connecting the front end of the base to the rear surface of the supporting plate includes at least one hinge that allows the base to rotate with respect to the supporting plate to form different angles with respect to the supporting plate.

20. The needle insertion assistance device of claim 15 further comprising

a handle securely affixed to the underside of the base;

wherein the needle insertion assistance device has a size; and

whereby the handle increases the size of the needle insertion assistance device and facilitates handling and hand-held usage of the needle insertion assistance device by a human being.

21. The needle insertion assistance device of claim 20 wherein

the handle further includes a sloping bottom, a sloping front, and at least one notch to facilitate handling and hand-held usage of the needle insertion assistance device by a human being.

22. The needle insertion assistance device of claim 15 further comprising

a needle blocker including

a screw bolt having two ends,

a screw nut screwed on the screw bolt, and

at least one screw support securely affixed to one end of the screw bolt and securely affixed to one side of the top surface of the base to support the screw bolt and the screw nut over the side of the top surface of the base;

and

whereby the screw nut prevents the needle device from advancing forward by blocking the needle wing of the needle device from advancing forward beyond a location of the screw nut.

23. The needle insertion assistance device of claim 15 further comprising

a means for stopping rotation of the base with respect to the supporting plate to fix an angle of the base with respect to the supporting plate to stabilize an angle at which the needle is inserted into a human body.

24. The needle insertion assistance device of claim 23 wherein

the means for stopping rotation of the base with respect to the supporting plate includes an angle adjusting assembly having two ends, and pivotally connected to the rear surface of the supporting plate at one end and slidably connected to the base at another end.

25. The needle insertion assistance device of claim 24 wherein

the angle adjusting assembly further includes

an arm support securely affixed to the base,

an arm screw, and

an arm having a sliding gap, and two ends, one end of the arm pivotally connected to the rear surface of the supporting plate and another end of the arm slidably connected to the base by the arm support and the arm screw with the arm screw inserted through the sliding gap of the arm and then screwed into the arm support so that the arm can slide with respect to the arm support and the base over the arm screw;

whereby the arm is able to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a loose state, and unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a tight state; and

whereby the base is unable to rotate with respect to the supporting plate if the arm is unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into the tight state.

26. The needle insertion assistance device of claim 15 wherein

the supporting plate further includes an upper part, and at least one needle gap situated at the upper part of the supporting plate for the needle to pass through the supporting plate.

27. The needle insertion assistance device of claim 15 wherein

the base further includes at least one set of ruler marks marked on the top surface of the base to indicate how far the needle advances with each attempt of advancement.

28. A needle insertion assistance device for use with a needle device, the needle device including a syringe and a needle that has a needle wing and is attached to the syringe, the needle insertion assistance device comprising

a base having a front end, a rear end, an underside, and a top surface having two sides, to support the needle device on the top surface;

a supporting plate having a front surface, and a rear surface to support the needle insertion assistance device and prevent unintentional forward advancement of the needle insertion assistance device;

a means for connecting the front end of the base to the rear surface of the supporting plate; and

a means for holding the needle wing of the needle device on the base.

29. The needle insertion assistance device of claim 28 further comprising

a needle blocker including

a screw bolt having two ends,

a screw nut screwed on the screw bolt, and

at least one screw support securely affixed to one end of the screw bolt and securely affixed to one side of the top surface of the base to support the screw bolt and the screw nut over the side of the top surface of the base;

and

whereby the screw nut prevents the needle device from advancing forward by blocking the needle wing of the needle device from advancing forward beyond a location of the screw nut.

30. The needle insertion assistance device of claim 28 wherein

the means for holding the needle wing on the base includes at least one wing holding mechanism to hold the needle wing on the base to allow the needle wing, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

31. The needle insertion assistance device of claim 30 wherein

the wing holding mechanism further includes at least one wing holder securely affixed to another side of the top surface of the base, opposite to the side where the screw support of the needle blocker is securely affixed to;

and

wherein the wing holder and the screw bolt of the needle blocker hold the needle wing of the needle device on the base, and between the wing holder and the screw bolt of the needle blocker, in order to allow the needle wing, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

32. The needle insertion assistance device of claim 28 wherein

the means for connecting the front end of the base to the rear surface of the supporting plate includes at least one hinge that allows the base to rotate with respect to the supporting plate to form different angles with respect to the supporting plate.

33. The needle insertion assistance device of claim 28 further comprising

a handle securely affixed to the underside of the base;

wherein the needle insertion assistance device has a size; and

whereby the handle increases the size of the needle insertion assistance device and facilitates handling and hand-held usage of the needle insertion assistance device by a human being.

34. The needle insertion assistance device of claim 33 wherein

the handle further includes a sloping bottom, a sloping front, and at least one notch to facilitate handling and hand-held usage of the needle insertion assistance device by a human being.

35. The needle insertion assistance device of claim 28 further comprising

a means for stopping rotation of the base with respect to the supporting plate to fix an angle of the base with respect to the supporting plate to stabilize an angle at which the needle is inserted into a human body.

36. The needle insertion assistance device of claim 35 wherein

the means for stopping rotation of the base with respect to the supporting plate includes an angle adjusting assembly having two ends, and pivotally connected to the rear surface of the supporting plate at one end and slidably connected to the base at another end.

37. The needle insertion assistance device of claim 36 wherein

the angle adjusting assembly further includes

an arm support securely affixed to the base,

an arm screw, and

an arm having a sliding gap, and two ends, one end of the arm pivotally connected to the rear surface of the supporting plate and another end of the arm slidably connected to the base by the arm support and the arm screw with the arm screw inserted through the sliding gap of the arm and then screwed into the arm support so that the arm can slide with respect to the arm support and the base over the arm screw;

whereby the arm is able to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a loose state, and unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a tight state; and

whereby the base is unable to rotate with respect to the supporting plate if the arm is unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into the tight state.

38. The needle insertion assistance device of claim 28 wherein

the supporting plate further includes an upper part, and at least one needle gap situated at the upper part of the supporting plate for the needle to pass through the supporting plate.

39. The needle insertion assistance device of claim 28 wherein

the base further includes at least one set of ruler marks marked on the top surface of the base to indicate how far the needle advances with each attempt of advancement.

40. A needle insertion assistance device for use with a needle device, the needle device including a syringe and a needle that has a needle wing and is attached to the syringe, the needle insertion assistance device comprising

a base having a top surface, an underside, a front end, a rear end, and a syringe holding groove longitudinally furrowed in the top surface of the base to receive about one side of the syringe of the needle device so that the syringe of the needle device is able to advance forward in a straight line, but unable to move from side to side;

a supporting plate having a front surface, and a rear surface to support the needle insertion assistance device and prevent unintentional forward advancement of the needle insertion assistance device; and

a means for connecting the front end of the base to the rear surface of the supporting plate.

41. The needle insertion assistance device of claim 40 wherein

the syringe holding groove has a predetermined cross-sectional shape to receive about one side of the syringe of the needle device so that the syringe of the needle device is able to advance forward in a straight line, but unable to move from side to side.

42. The needle insertion assistance device of claim 40 wherein

the base has a longitudinal length;

and wherein the syringe holding groove has a length from about half of the longitudinal length of the base to the longitudinal length of the base, a depth of about half of the diameter of the syringe, and a width approximately the same as the diameter of the syringe, in order to receive about one side of the syringe of the needle device and allow the syringe of the needle device to be able to advance forward in a straight line, but to be unable to move from side to side.

43. The needle insertion assistance device of claim 40 wherein

the means for connecting the front end of the base to the rear surface of the supporting plate includes at least one hinge that allows the base to rotate with respect to the supporting plate to form different angles with respect to the supporting plate.

44. The needle insertion assistance device of claim 40 further comprising

a needle blocker including

a screw bolt having two ends,

a screw nut screwed on the screw bolt, and

at least one screw support securely affixed to one end of the screw bolt and securely affixed to one side of the top surface of the base to support the screw bolt and the screw nut over the side of the top surface of the base;

and

whereby the screw nut prevents the needle device from advancing forward by blocking the needle wing of the needle device from advancing forward beyond a location of the screw nut.

45. The needle insertion assistance device of claim 40 further comprising

a handle securely affixed to the underside of the base;

wherein the needle insertion assistance device has a size; and

whereby the handle increases the size of the needle insertion assistance device and facilitates handling and hand-held usage of the needle insertion assistance device by a human being.

46. The needle insertion assistance device of claim 45 wherein

the handle further includes a sloping bottom, a sloping front, and at least one notch to facilitate handling and hand-held usage of the needle insertion assistance device by a human being.

47. The needle insertion assistance device of claim 40 further comprising

a means for stopping rotation of the base with respect to the supporting plate to fix an angle of the base with respect to the supporting plate to stabilize an angle at which the needle is inserted into a human body.

48. The needle insertion assistance device of claim 47 wherein

the means for stopping rotation of the base with respect to the supporting plate includes an angle adjusting assembly having two ends, and pivotally connected to the rear surface of the supporting plate at one end and slidably connected to the base at another end.

49. The needle insertion assistance device of claim 48 wherein

the angle adjusting assembly further includes

an arm support securely affixed to the base,

an arm screw, and

an arm having a sliding gap, and two ends, one end of the arm pivotally connected to the rear surface of the supporting plate and another end of the arm slidably connected to the base by the arm support and the arm screw with the arm screw inserted through the sliding gap of the arm and then screwed into the arm support so that the arm can slide with respect to the arm support and the base over the arm screw;

whereby the arm is able to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a loose state, and unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a tight state; and

whereby the base is unable to rotate with respect to the supporting plate if the arm is unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into the tight state.

50. The needle insertion assistance device of claim 40 wherein

the supporting plate further includes an upper part, and at least one needle gap situated at the upper part of the supporting plate for the needle to pass through the supporting plate.

51. The needle insertion assistance device of claim 40 wherein

the base further includes at least one set of ruler marks marked on the top surface of the base to indicate how far the needle advances with each attempt of advancement.

52. A needle insertion assistance device for use with a needle device, the needle device including a syringe and a needle that has a needle wing and is attached to the syringe, the needle insertion assistance device comprising

a supporting plate having a front surface, and a rear surface to support the needle insertion assistance device and prevent unintentional forward advancement of the needle insertion assistance device;

a base having a front end, a rear end, an underside, and a top surface having two sides, and a rear part, with the front end of the base hingedly connected to the rear surface of the supporting plate to allow the base to rotate with respect to the supporting plate to form different angles with respect to the supporting plate;

at least two syringe holding plates securely affixed to both sides of the rear part of the top surface of the base respectively; and

whereby the syringe holding plates hold the syringe of the needle device on the base and between the syringe holding plates, and allow the syringe, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

53. The needle insertion assistance device of claim 52 wherein

the base further includes a groove longitudinally furrowed in the top surface of the base;

and

whereby the groove is configured to act as a recess to hold a part of one side of the syringe of the needle device on the top surface of the base and is configured to act as a track for the syringe of the needle device to advance in a straight line.

54. The needle insertion assistance device of claim 53 wherein

the base has a longitudinal length, and a thickness;

and wherein the groove has a length from about half of the longitudinal length of the base to the longitudinal length of the base, a depth from about half one millimeter to the thickness of the base, and a width smaller than the diameter of the syringe, in order to hold a part of one side of the syringe on the top surface of the base and act as a track for the syringe of the needle device to advance in a straight line.

55. The needle insertion assistance device of claim 52 further comprising

a needle blocker including

a screw bolt having two ends,

a screw nut screwed on the screw bolt, and

at least one screw support securely affixed to one end of the screw bolt and securely affixed to one side of the top surface of the base to support the screw bolt and the screw nut over the side of the top surface of the base;

and

whereby the screw nut prevents the needle device from advancing forward by blocking the needle wing of the needle device from advancing forward beyond a location of the screw nut.

56. The needle insertion assistance device of claim 52 further comprises

a handle securely affixed to the underside of the base;

wherein the needle insertion assistance device has a size; and

whereby the handle increases the size of the needle insertion assistance device and facilitates handling and hand-held usage of the needle insertion assistance device by a human being.

57. The needle insertion assistance device of claim 56 wherein

the handle further includes a sloping bottom, a sloping front, and at least one notch to facilitate handling and hand-held usage of the needle insertion assistance device by a human being.

58. The needle insertion assistance device of claim 52 further comprising

a means for stopping rotation of the base with respect to the supporting plate to fix an angle of the base with respect to the supporting plate to stabilize an angle at which the needle is inserted into a human body.

59. The needle insertion assistance device of claim 58 wherein

the means for stopping rotation of the base with respect to the supporting plate includes an angle adjusting assembly having two ends, and pivotally connected to the rear surface of the supporting plate at one end and slidably connected to the base at another end.

60. The needle insertion assistance device of claim 59 wherein

the angle adjusting assembly further includes

an arm support securely affixed to the base,

an arm screw, and

an arm having a sliding gap, and two ends, one end of the arm pivotally connected to the rear surface of the supporting plate and another end of the arm slidably connected to the base by the arm support and the arm screw with the arm screw inserted through the sliding gap of the arm and then screwed into the arm support so that the arm can slide with respect to the arm support and the base over the arm screw;

whereby the arm is able to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a loose state, and unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a tight state; and

whereby the base is unable to rotate with respect to the supporting plate if the arm is unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into the tight state.

61. The needle insertion assistance device of claim 52 wherein

the supporting plate further includes an upper part, and at least one needle gap situated at the upper part of the supporting plate for the needle to pass through the supporting plate.

62. The needle insertion assistance device of claim 52 wherein

the base further includes at least one set of ruler marks marked on the top surface of the base to indicate how far the needle advances with each attempt of advancement.

63. A needle insertion assistance device for use with a needle device, the needle device including a syringe and a needle that has a needle wing and is attached to the syringe, the needle insertion assistance device comprising

a supporting plate having a front surface, and a rear surface to support the needle insertion assistance device and prevent unintentional forward advancement of the needle insertion assistance device;

a base having a front end, a rear end, an underside, and a top surface having two sides, with the front end of the base hingedly connected to the rear surface of the supporting plate to allow the base to rotate with respect to the supporting plate to form different angles with respect to the supporting plate;

at least one wing holding mechanism on the top surface of the base to hold the needle wing of the needle device on the base to allow the needle wing, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

64. The needle insertion assistance device of claim 63 further comprising

a needle blocker including

a screw bolt having two ends,

a screw nut screwed on the screw bolt, and

at least one screw support securely affixed to one end of the screw bolt and securely affixed to one side of the top surface of the base to support the screw bolt and the screw nut over the side of the top surface of the base;

and

whereby the screw nut prevents the needle device from advancing forward by blocking the needle wing of the needle device from advancing forward beyond a location of the screw nut.

65. The needle insertion assistance device of claim 63 wherein

the wing holding mechanism further includes at least one wing holder securely affixed to another side of the top surface of the base, opposite to the side where the screw support of the needle blocker is securely affixed to;

and

whereby the wing holder and the screw bolt of the needle blocker hold the needle wing of the needle device on the base, and between the wing holder and the screw bolt of the needle blocker, in order to allow the needle wing, as well as the needle device, to be able to advance forward in a straight line, but to be unable to move from side to side.

66. The needle insertion assistance device of claim 63 further comprising

a handle securely affixed to the underside of the base;

wherein the needle insertion assistance device has a size; and

whereby the handle increases the size of the needle insertion assistance device and facilitates handling and hand-held usage of the needle insertion assistance device by a human being.

67. The needle insertion assistance device of claim 66 wherein

the handle further includes a sloping bottom, a sloping front, and at least one notch to facilitate handling and hand-held usage of the needle insertion assistance device by a human being.

68. The needle insertion assistance device of claim 63 further comprising

a means for stopping rotation of the base with respect to the supporting plate to fix an angle of the base with respect to the supporting plate to stabilize an angle at which the needle is inserted into a human body.

69. The needle insertion assistance device of claim 68 wherein

the means for stopping rotation of the base with respect to the supporting plate includes an angle adjusting assembly having two ends, and pivotally connected to the rear surface of the supporting plate at one end and slidably connected to the base at another end.

70. The needle insertion assistance device of claim 69 wherein

the angle adjusting assembly further includes

an arm support securely affixed to the base,

an arm screw, and

an arm having a sliding gap, and two ends, one end of the arm pivotally connected to the rear surface of the supporting plate and another end of the arm slidably connected to the base by the arm support and the arm screw with the arm screw inserted through the sliding gap of the arm and then screwed into the arm support so that the arm can slide with respect to the arm support and the base over the arm screw;

whereby the arm is able to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a loose state, and unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into a tight state; and

whereby the base is unable to rotate with respect to the supporting plate if the arm is unable to slide with respect to the arm support and the base over the arm screw when the arm screw is turned and driven into the tight state.

71. The needle insertion assistance device of claim 63 wherein

the supporting plate further includes an upper part, and at least one needle gap situated at the upper part of the supporting plate for the needle to pass through the supporting plate.

72. The needle insertion assistance device of claim 63 wherein

the base further includes at least one set of ruler marks marked on the top surface of the base to indicate how far the needle advances with each attempt of advancement.