Gastroscopy helps your doctor evaluate various symptoms that include persistent upper abdominal pain, nausea, vomiting or difficulty swallowing. It is an excellent test for finding and treating the cause of bleeding from the upper gastrointestinal tract.astroscopy helps your doctor evaluate various symptoms that include persistent upper abdominal pain, nausea, vomiting or difficulty swallowing. It is an excellent test for finding and treating the cause of bleeding from the upper gastrointestinal tract.
Cerebrospinal fluid (CSF) is a watery fluid that circulates through the brainâs ventricles (cavities or hollow spaces) and around the surface of the brain and spinal cord. A CSF leak is a condition that occurs when the CSF leaks through a defect in the dura or the skull and out through the nose or ear.erebrospinal fluid (CSF) is a watery fluid that circulates through the brainâs ventricles (cavities or hollow spaces) and around the surface of the brain and spinal cord. A CSF leak is a condition that occurs when the CSF leaks through a defect in the dura or the skull and out through the nose or ear.
Potassium. CSF is one of many fluids produced in the human body. This fluid is specific to the central nervous system (the brain, spinal cord). Cerebrospinal fluid (CSF) is the viscous liquid which pads or cushions the brain and spinal cord as well as allowing metabolites and even some cells to disperse in its medium.otassium. CSF is one of many fluids produced in the human body. This fluid is specific to the central nervous system (the brain, spinal cord). Cerebrospinal fluid (CSF) is the viscous liquid which pads or cushions the brain and spinal cord as well as allowing metabolites and even some cells to disperse in its medium.