This is from the CDC's flu vaccine instructions to health care providers:
"The intramuscular route is recommended for TIV. Adults and older children should be vaccinated in the deltoid muscle. A needle length of 1 inch or longer (>25 mm) should be considered for persons in these age groups because needles of <1 inch might be of insufficient length to penetrate muscle tissue in certain adults and older children. When injecting into the deltoid muscle among children with adequate deltoid muscle mass, a needle length of 7/8--1.25 inches is recommended.
Infants and young children should be vaccinated in the anterolateral aspect of the thigh. A needle length of 7/8--1 inch should be used for children aged <12 months."
http://www.cdc.gov/flu/professionals/acip/dosage.htm
For vaccines or to draw blood I would use a 20 gauge needle on adult sheep and a 22 gauge on a lamb. To administer medications such as penicillin, I would use a 16 or 18 gauge depending upon the drug and the volume needed.
21 gauge
For an 8-year-old, a 22 to 25 gauge needle is typically used for injections, depending on the type and viscosity of the medication being administered. A 22 gauge needle is often preferred for vaccines, while a finer 25 gauge needle may be suitable for other types of injections. It's important to consider the child's size and comfort when selecting the appropriate gauge. Always consult a healthcare professional for specific recommendations.
No, a 20-gauge needle is smaller than an 18-gauge needle. The gauge number indicates the diameter of the needle, with a lower gauge number signifying a larger diameter. Therefore, an 18-gauge needle is thicker and has a larger bore compared to a 20-gauge needle.
The size of a needle is typically expressed by its gauge, which is a numerical scale where a higher number indicates a thinner needle. For example, a 30-gauge needle is finer than an 18-gauge needle. Additionally, needle sizes may also be described by their length and type (e.g., hollow bore, straight, or curved) depending on their intended use in medical procedures or sewing.
The next biggest gauge needle to a 21-gauge is a 20-gauge needle. In the gauge system, a lower number indicates a larger diameter, so as the gauge number decreases, the needle size increases. Therefore, a 20-gauge needle is thicker than a 21-gauge needle.
Yes, a 30 gauge needle is larger than a 31 gauge needle. In the gauge system, a higher number indicates a smaller diameter, so a 31 gauge needle is thinner than a 30 gauge needle. Therefore, the 31 gauge needle would be the smaller of the two.
A 25-gauge needle is smaller in diameter than a 23-gauge needle. The larger the gauge number, the thinner the needle, so a 25-gauge needle has a smaller lumen compared to a 23-gauge needle. This means that for tasks requiring finer needles, such as pediatric or cosmetic procedures, a 25-gauge needle would be preferred.
The 21 gauge is a smaller needle.
The 23 gauge butterfly needle is smaller than the 21 gauge. In the context of needles, a higher gauge number indicates a thinner needle, so a 23 gauge needle has a smaller lumen compared to a 21 gauge needle. Therefore, if you need a finer needle, the 23 gauge would be the appropriate choice.
Gauge is the term that indicates the diameter of the needle. Most commonly the needles that are used for medical purposed range from 7 Gauge to 33 Gauge, according to the Stubs scale. 7 Gauge needle will have the largest diameter while as the number increase, the diameter decreases. Therefore the 33 Gauge needle has the smallest diameter. So a 26 Gauge needle will have a smaller diameter than that of the 18 Gauge needle.
Yes, the larger the gauge the smaller the needle size.