The words tijera and tijeras can be used interchangeably in Spanish to refer to a single pair of scissors.
Both IV sedation (twilight) and general anesthesia are used commonly for cosmetic or plastic surgery. Regardless of technique, the patient's vital signs must be monitored, which include but not limited to heart rate, blood pressure, and breathing rate.
If you've had your wisdom teeth taken out, for example, you've probably had procedural sedation. This type of anesthesia is used for short, relatively minor medical procedures and is also known as conscious sedation or twilight anesthesia. In addition to dental work, procedural sedation is used for things like setting broken bones, LASIK and minor cosmetic surgeries.