Dental Instrument Setups

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THE BASIC EXAMINATION AND ANESTHETIC INSTRUMENTS

1-20. INSTRUMENTS FOR LOCAL ANESTHESIA

a. Anesthetic Syringe (Syringe, Cartridge) (figure 1-15). The anesthetic syringe is designed to support and expel anesthetic solution from a commercially prepared glass cartridge called a Carpule™. (The trademark name is Carpule.) The cartridge syringe available for local anesthesia has a thumb-ring handle at the outer end and a harpoon at the cartridge end of the plunger. The harpoon is designed to engage the rubber stopper plunger of the cartridge. The thumb-ring is used to draw back on the plunger to determine whether the needle has penetrated a blood vessel. This procedure is called "aspirating," and the syringe is an aspirating syringe.

Figure 1-15. Anesthetic syringe (aspirating).

b. Disposable Needles (Needles, Disposable). Disposable needles are packaged to keep them in a sterile condition. Once used, they are discarded. They are attached to the syringe by a plastic hub, which is part of the disposable needle. They are supplied in lengths of thirteen-sixteenths of an inch and one and three-eighths of an inch. Disposable needles are always sterile, always sharp, and less likely to break than other needles. Hypodermic needles should be disposed of in such a way that they cannot injure clinic personnel or will not be available for pilferage or theft.

Primary Content Providers: The U. S. Army, The U.S. Navy
Ancillary Content and Online Version: David L. Heiserman
Publisher: SweetHaven Publishing Services