What is a syringe pump?
A syringe is a simple reciprocating pump consisting of a plunger (though in modern syringes, it is actually a piston) that fits tightly within a cylindrical tube called a barrel.
What is a three part syringe?
A three-part syringe contains a plastic plunger/ piston with a rubber tip to create a seal between the piston and the barrel, where a two-part syringe is manufactured to created a perfect fit between the plastic plunger and the barrel to create the seal without the need for a separate synthetic rubber piston.
How many ml is a syringe?
The contents are simply squirted or sucked from the syringe directly into the mouth of the person or animal. Oral syringes are available in various sizes, from 1–10 mL and larger. The sizes most commonly used are 1 mL, 2.5 mL and 5 mL.
Why are needle syringes not used in human medicine?
There are needle syringes designed to reload from a built-in tank (container) after each injection, so they can make several or many injections on a filling. These are not used much in human medicine because of the risk of cross-infection via the needle. An exception is the personal insulin autoinjector used by diabetic patients and in dual-chambered syringe designs intended to deliver a prefilled saline flush solution after the medication.
What is a syringe barrel made of?
The barrel of a syringe is made of plastic or glass, usually has graduated marks indicating the volume of fluid in the syringe, and is nearly always transparent. Glass syringes may be sterilized in an autoclave. Plastic syringes can be constructed as either two-part or three-part designs.
Why are syringes plastic?
Most modern medical syringes are plastic because they are cheap enough to dispose of after being used only once, reducing the risk of spreading blood-borne diseases. Reuse of needles and syringes has caused spread of diseases, especially HIV and hepatitis, among intravenous drug users.
What is a disposable syringe?
Disposable syringe with needle, with parts labelled: plunger, barrel, needle adaptor, needle hub, needle bevel, needle shaft. According to the World Health Organization, about 90% of the medical syringes are used to administer drugs, 5% for vaccinations and 5% for other uses such as blood transfusions.
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How to read a syringe?
1. Hold the syringe by its flange. Grasp the syringe by the winged parts located on the end of the syringe opposite from the tip. This is known as the flange. Holding the syringe this way makes it so your fingers won't be in the way while you try to read the syringe.
Why is holding a syringe important?
Holding the syringe this way is also important for super-precise, scientific measurements, to ensure that your body heat from your fingers doesn't distort the material you're measuring in the syringe. For everyday measurements (like home medications), you don't need to worry about body heat distortion. ...
What does a hash mark on a syringe mean?
You'll see hash marks on the tube of the syringe. Each 1 marks a certain number of milliliters or fractions of milliliters. Some syringes, such as those used to measure insulin, are marked in numbers of "units" rather than milliliters. Some older or non-standard syringes may also use different units.
How to tell if a syringe is a milliliter?
Most syringes will be clearly marked in milliliters, though some older ones are in different units. Look at the larger, numbered hash marks , then count how many smaller hash marks are in between to verify if these smaller marks are half or whole units. To learn how to use a syringe accurately, keep reading!
How many ml is a syringe?
For instance, you might have a syringe that is marked large lines at 2 milliliters (0.068 fl oz), 4 mL, and 6 mL. Halfway between each of these large lines, you might see a slightly smaller line.
Why are the tips of a syringe eccentric?
Eccentric tips are offset from the center of the syringe to allow closer proximity to the skin. The connection works similar to the slip tip. Useful for venipunctures and fluid aspiration.
What is a syringe and needle?
As mentioned above, syringes and medical needles perform four basic services of drawing fluid or tissue samples, performing medication injections, wound irrigation, & intravenous applications. The tool you select should match the task you are performing. Select phlebotomy supplies for blood draws, biopsy kits for sampling, syringes and needles for medication delivery, irrigation supplies for cleansing & flushing, and IV Supplies for intravenous administration.
What is the difference between a small and large syringe?
Subcutaneous and intramuscular injections often take place with smaller volume syringe. A small volume syringe exerts higher pressure flows for injecting the medication. Larger syringe sizes offer lower pressure flows.
What is a slip tip?
The Slip Tip employs a friction-fit connection. The tip of the syringe slides into the needle hub fitting in a push and twist motion. It is considered less secure than the Luer Lock system.
What are the different types of syringe tips?
Syringe tips come in five basic configurations. Luer Lok tips are the most popular. Luer Lok tips have a screw-type connection that keeps the needle secure to the syringe. The Catheter Tip has a long, tapered tip to allow tubing and catheters to attached for irrigation or flushing. The Slip Tip is a shorter version of the Catheter Tip that allows the needle hub to slip or push-on to the syringe. The Eccentric Tip has an off-center tip that is useful for surface veins or artery injections. The last tip is a fixed tip with a needle that is not detachable.
What is the purpose of the plunger tip?
It also serves as the measurement marker for medication volume. The plunger tip creates a vacuum as it moves away from the syringe tip, drawing in the medication. As the plunger moves toward the syringe tip, it forces out the medication.
How do bulb syringes work?
Bulb devices do not employ a plunger but instead, have a flexible blub at the end of the barrel where the thumb press would normally be. Squeezing the bulb forces air out and releasing the bulb forms a vacuum to draw in solutions. The user submerges the syringe tip in the irrigation solution to draw the solution into the barrel. The user then again squeezes the bulb to force the solution out of the barrel to irrigate. There are several types of bulb syringes in use, including ear syringes, mucus syringes, Green-Bulb syringe, Clear-View syringes, and others.
Overview
A syringe is a simple reciprocating pump consisting of a plunger (though in modern syringes, it is actually a piston) that fits tightly within a cylindrical tube called a barrel. The plunger can be linearly pulled and pushed along the inside of the tube, allowing the syringe to take in and expel liquid or gas through a discharge orifice at the front (open) end of the tube. The open end of the syrin…
Medical syringes
Sectors in the syringe and needle market include disposable and safety syringes, injection pens, needleless injectors, insulin pumps, and specialty needles. Hypodermic syringes are used with hypodermic needles to inject liquid or gases into body tissues, or to remove from the body. Injecting of air into a blood vessel is hazardous, as it may cause an air embolism; preventing embolisms by removing
Non-medical uses
The syringe has many non-medical applications.
Medical-grade disposable hypodermic syringes are often used in research laboratories for convenience and low cost. Another application is to use the needle tip to add liquids to very confined spaces, such as washing out some scientific apparatus. They are often used for measuring and transferring solve…
Historical timeline
• Piston syringes were used in ancient times. During the 1st century AD Aulus Cornelius Celsus mentioned the use of them to treat medical complications in his De Medicina.
• 9th century: The Iraqi/Egyptian surgeon Ammar ibn 'Ali al-Mawsili' created a syringe in the 9th century using a hollow glass tube, and suction to remove cataracts from patients' eyes, a practice that remained in us…
See also
• Fire syringe has two meanings:
• Autoinjector, a device to ease injection, e.g. by the patient or other untrained personnel.
• Hippy Sippy
• Jet injector, injects without a needle, by squirting the injection fluid so fast that it makes a hole in the skin.
Further reading
• Hans-Jürgen Bässler und Frank Lehmann : Containment Technology: Progress in the Pharmaceutical and Food Processing Industry. Springer, Berlin 2013, ISBN 978-3642392917
External links
• Inventors of the hypodermic syringe
• Hypodermic syringe patents
• Medical syringe patents
• YouTube video of a juvenile red squirrel suckling milk from a hypodermic syringe without a needle