Glossary

Category: S

  • Sippy diet

    An alkaline diet of milk and dry biscuits as a treatment for peptic ulcers [After Bertram Welton Sippy (1866-1924), physician in Chicago, USA]. A therapy for peptic ulcers endorsed by Dr. B. W. Sippy, an American physician (1866-1924). The regimen initially comprises solely milk for the initial three or four days, following which small portions…

  • Siphonage

    The removal of liquid from one place to another with a tube, as used to empty the stomach of its contents. The transfer of liquid from one container to another by means of a bent tube. The procedure is used in gastric lavage, when the stomach is filled with water through a funnel and rubber…

  • Sinus venosus

    A cavity in the heart of an embryo, part of which develops into the coronary sinus and part of which is absorbed into the right atrium. A chamber of the embryonic heart that receives blood from several veins. In the adult heart it becomes part of the right atrium. In the embryo, a large venous…

  • Sinus tachycardia

    Rapid beating of the heart caused by stimulation of the sinoatrial node. Heart rate with normal rhythm but elevated rate above 100 beats per minute. A fast heartbeat originating in the sinus node, the heart’s own pacemaker. Sinus tachycardia is normal during exercise or when a person experiences anxiety. It may also be caused by…

  • Sinus nerve

    A nerve which branches from the glossopharyngeal nerve.  

  • Sinography

    Examination of a sinus by taking an X-ray photograph.  

  • Sinogram

    An X-ray photograph of a sinus. A radiograph of a sinus tract filled with a radiopaque contrast medium to determine the rang and course of the tract.  

  • Sinoatrial node

    A node in the heart at the junction of the superior vena cava and the right atrium, which regulates the heartbeat. Area of modified cardiac muscle in the right atrium near the entry of the superior vena cava that generates impulses that travel through the muscles of both atria, causing them to contract. Cells in…

  • Sinoatrial

    Relating to the sinus venosus and the right atrium of the heart.  

  • Sinistral

    Relating to or located on the left side, especially the left side of the body. Relating to the left side or an individual who is left-handed.