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The jaw-thrust maneuver is a first aid and medical procedure used to prevent the tongue from obstructing the upper airways. This maneuver and the head-tilt/chin-lift maneuver are two of the main tools of basic airway management , and they are often used in conjunction with other basic airway techniques including bag-valve-mask ventilation.
This is an accepted version of this page This is the latest accepted revision, reviewed on 19 February 2025. Self-propulsion through water This article is about standard human swimming. For competitive swimming, see Swimming (sport). For animal swimming, see Aquatic locomotion. For other uses, see Swimming (disambiguation) and Swimmer (disambiguation). A competitive swimmer performing the ...
Thrust production in these animals is produced via lift principles, much like in aerial flight. These birds essentially "fly" beneath the surface of the water. Because they have the dual role of producing thrust in both flight and swimming, wings in these animals demonstrate a compromise between the functional demands of two different fluid media.
The jaw-thrust maneuver is an effective airway technique, particularly in the patient in whom cervical spine injury is a concern. It is easiest when the patient is positioned supine. The practitioner places their index and middle fingers behind the angle of the mandible to physically push the posterior aspects of the mandible upwards while ...
A great cormorant swimming. Aquatic locomotion or swimming is biologically propelled motion through a liquid medium. The simplest propulsive systems are composed of cilia and flagella. Swimming has evolved a number of times in a range of organisms including arthropods, fish, molluscs, amphibians, reptiles, birds, and mammals.
The fins are rotated outwards with the soles facing backwards, and toes outwards, then the legs are extended so the fins push water backwards, while extending the ankles to close the gap between the fins, to push backwards a bit more. Incomplete ankle rotation will cause thrust to be exerted partly upwards which would tend to push the feet down ...
The Centers for Disease Control and Prevention (CDC) recommends swimming lessons for children from 1–4, along with other precautionary measures to prevent drowning. [4] In 2010, the American Academy of Pediatrics reversed its previous position in which it had disapproved of lessons before age 4, indicating that the evidence no longer supported an advisory against early swimming lessons.
During swimming sea lions have a thrust phase, which lasts about 60% of the full cycle, and the recovery phase lasts the remaining 40%. A full cycle duration lasts about 0.5 to 1.0 seconds. [ 3 ] Changing direction is a very rapid maneuver that is initiated by head movement towards the back of the animal that is followed by a spiral turn with ...