Title: Syringe for collecting blood
Abstract: A syringe for collecting blood includes a cylinder for sucking blood, two guide slits formed on a rear portion of the cylinder in such a way as to be symmetrical with respect to a midpoint of the guide slits, and a rod-shaped handle provided at a rear end of a piston rod in the cylinder so that the handle is transversely fitted into the guide slits. When a user puts his/her thumb on a rear end of the cylinder and rearwardly draws the handle along the guide slits using his/her index and middle fingers, blood is sucked into the cylinder by a rearward movement of the piston in the cylinder.
Patent Number: 6,972,004 Issued on 12/06/2005 to La
| Inventors:
|
La; Keuk Hwan (Field Com Inc., 12/6, #291-25, Yolgye-Dong, Nowon-Gu, Seoul, 139-050, KR)
|
| Appl. No.:
|
322298 |
| Filed:
|
December 17, 2002 |
| Current U.S. Class: |
604/187; 604/227; 604/181; 222/386 |
| Intern'l Class: |
A61M 005/00 |
| Field of Search: |
604/187,207-8,218,220,227,960.1,915,508,500,181,221,228,403
222/386
|
References Cited [Referenced By]
U.S. Patent Documents
Primary Examiner: Rodriguez; Cris
Attorney, Agent or Firm: Cantor Colburn LLP
Claims
1. A syringe for collecting blood, comprising:
a cylinder for sucking blood;
two guide slits formed on a rear portion of the cylinder, the guide slits being
symmetrical with respect to a midpoint of the guide slits; and
a rod-shaped handle provided at a rear end of a piston rod in the cylinder so
that the handle is transversely fitted into the guide slits,
wherein the guide slits each have at least one stopper at a selected position
of the respective guide slits, the guide slits each having a bent portion at the
stopper such that the rod-shaped handle is stopped by the stopper when moving toward
a rear end of the cylinder, the guide slits extending from the rear end of the
cylinder toward a forward end of the cylinder in an longitudinal direction, the
guide slits extending in a circumferential direction at the bent portion.
2. The syringe according to claim 1, wherein each of the guide slits comprises
an open rear end so that the handle is inserted into the guide slits and is mounted
to the cylinder.
3. The syringe according to claim 2, wherein each of the guide slits comprises
a closed front end.
4. The syringe according to claim 1, further comprising an end cap for covering
a rear end of the cylinder.
5. The syringe according to claim 4, wherein the end cap comprises a fitting
groove receiving an edge of the rear end of the cylinder.
6. The syringe according to claim 1, wherein when a user puts his/her thumb on
a rear end of the cylinder and rearwardly draws the handle along the guide slits
using his/her index and middle fingers, blood is sucked into the cylinder by a
rearward movement of the piston in the cylinder.
7. The syringe according to claim 1, wherein the handle is integrally provided
at a rear end of the piston rod such that the handle and the piston rod form a
"T" shape.
8. A syringe for collecting blood, comprising:
a cylinder for receiving blood;
two guide slits formed on a rear portion of the cylinder, the guide slits being
symmetrical with respect to a midpoint of the guide slits, the guide slits penetrating
entirely through a sidewall of the cylinder, the guide slits each including a first
section and a second section extending in a longitudinal direction of the cylinder; and
a rod-shaped handle provided at a rear end of a piston rod disposed in the cylinder
so that the rod-shaped handle is transversely fitted into the guide slits and opposite
ends of the mid-shaped handle protrude through the guide slits to an exterior of
the cylinder,
wherein the guide slits each include a stopper at a selected position of the
guide slits, the guide slits each having a bent portion forming the stopper such
that the rod-shaped handle is stopped by the stopper when moving toward a rear
end of the cylinder, the guide slits extending in a circumferential direction at
the bent portion, the bent portion being disposed between the first and second
sections, and the rod-shaped handle rotatable at the bent portion such that movement
of the rod-shaped handle over an entire range of the guide slits requires movement
in the longitudinal direction through the first and second section and rotation
in the circumferential direction through the bent portion.
9. The syringe according to claim 8, wherein each of the guide slits comprises
an open rear end so that the handle is inserted into the guide slits and is mounted
to the cylinder.
10. The syringe according to claim 9, wherein each of the guide slits comprises
a closed front end.
11. The syringe according to claim 8, further comprising an end cap for covering
a rear end of the cylinder.
12. The syringe according to claim 11, wherein the end cap comprises a fitting
groove receiving an edge of the rear end of the cylinder.
13. The syringe according to claim 8, wherein the handle is integrally provided
at a rear end of the piston rod such that the handle and the piston rod form a
"T" shape.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to syringes for collecting blood, and
more particularly, to a syringe for collecting blood which is designed to be easily
manipulated with one hand, thus allowing even an unskilled user to safely collect
blood, and preventing a patient from feeling pain during a blood collecting process.
2. Description of Related Art
Generally, a syringe is a medical instrument which is used to collect
blood from a patient or inject medicines into a patient. FIG. 1 is a perspective
view showing a conventional syringe. Particularly, when it is required to collect
blood from a patient, a user, for example, a nurse grasps the patient's arm with
one hand while holding a syringe with the other hand to insert a needle
11
of the syringe into a blood vessel.
After inserting the needle
11 into the blood vessel, the user shifts
his/her hand from the patient's arm to a cylinder
10 of the syringe, and
rearwardly draws a piston
13 of the syringe by drawing a piston rod
14
rearward with the other hand to collect blood from the patient.
However, such a conventional syringe has a problem that it may be undesirably
shaken when an unskilled user collects blood from a patient. Due to such shaking,
the needle may be undesirably removed from the blood vessel of the patient, thus
causing pain to the patient.
SUMMARY OF THE INVENTION
Accordingly, the present invention resolves the above problems, and
provides a syringe for collecting blood which can be easily manipulated with one
hand, allow even an unskilled user to safely collect blood, and prevent a patient
from feeling pain during a blood collecting process.
According to one aspect of the present invention, a syringe for collecting
blood, comprises a cylinder for sucking blood, two guide slits formed on a rear
portion of the cylinder, the two guide slits being symmetrical with respect to
a midpoint of the guide slits, and a rod-shaped handle provided at a rear end of
a piston rod in the cylinder so that the handle is transversely fitted into the
guide slits. When a user puts his/or her thumb on a rear end of the cylinder and
rearwardly draws the handle along the guide slits using his/her index and middle
fingers, blood is sucked into the cylinder by a rearward movement of the piston
in the cylinder.
According to the present invention, the guide slits are axially provided
on the cylinder, and comprise open rear ends so that the handle is inserted into
the guide slits, thus being mounted to the cylinder. The guide slits are axially
provided on the cylinder such that the guide slits are bent at their center portions,
and the guide slits comprise open rear ends so that the handle is inserted into
the guide slits, thus being mounted to the cylinder.
Further, the syringe further comprises an end cap covering the rear end
of the cylinder, and the end cap comprises a fitting groove so that an edge of
the rear end of the cylinder is fitted into the fitting groove.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and other advantages of the present invention
will be more clearly understood from the following detailed description taken in
conjunction with the accompanying drawings, in which:
FIG. 1 is a perspective view showing a conventional syringe;
FIG. 2 is a perspective view showing a syringe according to an exemplary embodiment
of the present invention;
FIG. 3 is a partially-broken perspective view showing a syringe according to
another exemplary embodiment of the present invention; and
FIG. 4 is a view showing the syringe of FIG. 3, when the syringe is used to
collect blood from a patient.
DESCRIPTION OF PREFERRED EMBODIMENTS
Reference should now be made to the drawings, in which the same reference
numerals are used throughout the different drawings to designate the same or similar components.
As shown in FIG. 2, the syringe according to an exemplary embodiment of the present
invention includes a cylinder
10, and two guide slits
2. The two
guide slits
2 are formed on a rear portion of the sidewall of the cylinder
10 and are formed at diametrically opposite positions of the rear portion
such that the guide slits are symmetrical with respect to a midpoint therebetween.
The guide slits
2 are axially and longitudinally formed on the cylinder
10. Each of the guide slits
2 has a closed front end and an open
rear end.
A rod-shaped handle
17 is mounted to a rear end of a piston rod
14.
The handle
17 is fitted into the open rear ends of the guide slits
2,
and then is pushed forward along the guide slits
2, thus being transversely
set in the guide slits
2.
When the handle
17 is mounted to the cylinder
10 in this way,
the handle
17 is outwardly projected at its both ends from the cylinder
10. In such a state, when a user pulls the handle
17 rearward using
his/her index and middle fingers, the handle
17 moves rearward along the
guide slits
2, thus rearwardly moving a piston
13.
According to the present invention, the syringe also includes an end cap
18 which covers an open rear end of the cylinder
10. The end cap
18 is provided with a fitting groove
18-
1 (referring to FIG.
3) so that an edge of the open rear end of the cylinder
10 is fitted into
the fitting groove
18-
1, thus preventing the rear end of the cylinder
10 from undesirably expanding in a radial direction due to the guide slits
2 which are formed on the cylinder
10.
The end cap
18 provides a thumb contact surface, thus preventing the syringe
from shaking when collecting blood from a patient.
Further, the end cap
18 closes the open rear ends of the guide slits
2, thus is preventing the handle
17 from being unexpectedly removed
from the guide slits
2 when the handle
17 moves rearward to collect
blood from a patient.
Meanwhile, as shown in FIG. 3, the syringe according to another exemplary
embodiment of the present invention includes a cylinder
10. Two guide slits
12 are formed on a rear portion of the sidewall of the cylinder
10
and formed at diametrically opposite positions such that the two guide slits
12
are symmetrical with respect to a midpoint therebetween.
The guide slits
12 are axially and longitudinally formed along the cylinder
10. Each of the guide slits
12 has a closed front end and an open
rear end. In the embodiment, the guide slits
12 are different from the guide
slits
2 of FIG. 2 in that each of the guide slits
12 is bent at its
center portion.
A rod-shaped handle
17 is mounted to a rear end of a piston rod
14.
In order to movably mount the handle
17 to the cylinder
10, the handle
17 is fitted into the open rear ends of the guide slits
12, and then
is pushed forward. While the handle
17 moves forward as such, the handle
17 is rotated at the bent portions which are formed at the center portions
of the guide slits
12.
Since the guide slits
12 are bent at their center portions, the handle
17 is stopped at the bent center portions while moving rearward. Thus, the
bent portions serve as a stopper which limits a rearward movement of the handle
17.
That is, when the bent portions are formed on the guide slits
12 at predetermined
positions according to the amount of blood to be collected, a desired amount of
blood is easily collected by a rearward movement of the piston
13 because
the handle
17 is stopped at the bent portions of the guide slits
12.
The operation of the syringe according to the present invention is as follows.
As shown in FIG. 4, at the initial stage, the handle
17 is positioned at
the front ends of the guide slits
2 or
12. At this time, the piston
13 is placed at a foremost position in the cylinder
10.
In such a state, a user grasps a patient's arm with a hand while grasping the
syringe with the other hand. When grasping the syringe, the user puts his/her thumb
on the end cap
18. The user also puts his/her index and middle fingers on
the front portion of the cylinder
10 in front of the handle
17 in
such a way as to stably hold the cylinder
10 while being in contact with
both projecting ends of the handle
17.
Next, the needle
11 is inserted into the blood vessel of the patient.
Subsequently, when the handle
17 is moved rearward along the guide slits
2 or
12 by the user's index and middle fingers, the piston
13
moves rearward along the inner surface of the cylinder
10, thus sucking
blood into the cylinder
10 from the patient through the needle
11
which is inserted into the blood vessel.
As such, shaking of the syringe of the present invention is minimized even when
an unskilled user collects blood from the blood vessel of a patient, and a blood
collecting process is completed within a short period of time, thus preventing
the patient from feeling pain.
As described above, the present invention provides a syringe for collecting blood,
which is designed to be easily manipulated with a single hand, allows blood to
be collected within a short period of time, prevents a needle of the syringe from
shaking, thus preventing a patient from feeling pain during a blood collecting
process and allowing even an unskilled user to easily and safely collect blood,
therefore being widely used to collect blood from patients in various places, such
as a hospital.
Although exemplary embodiments of the present invention have been disclosed
for illustrative purposes, those skilled in the art will appreciate that various
modifications, additions and substitutions are possible, without departing from
the scope and spirit of the invention as disclosed in the accompanying claims.
*
