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Ascites (/ ə ˈ s aɪ t i z /; [5] Greek: ἀσκός, romanized: askos, meaning "bag" or "sac" [6]) is the abnormal build-up of fluid in the abdomen. [1] Technically, it is more than 25 ml of fluid in the peritoneal cavity, although volumes greater than one liter may occur. [4]
The serum-ascites albumin gradient (SAAG) is the most useful index for evaluating peritoneal fluid and can help distinguish ascites caused by portal hypertension (cirrhosis, portal vein thrombosis, Budd-Chiari syndrome, etc.) from other causes of ascites. SAAG is calculated by subtracting the albumin measure of ascitic fluid from the serum value.
The serum-ascites albumin gradient or gap (SAAG) is a calculation used in medicine to help determine the cause of ascites. [1] The SAAG may be a better discriminant than the older method of classifying ascites fluid as a transudate versus exudate. [2] The formula is as follows: SAAG = (serum albumin) − (albumin level of ascitic fluid).
The serum-ascites albumin gradient can help determine the cause of the ascites. [7] The color of the ascitic fluid can also be useful in analysis. Blood fluid can indicate trauma or malignancy. A milky appearance of the fluid can indicate lymphoma or malignant peritoneal ascites. Cloudy or turbid fluid can indicate possible infection or ...
While abdominal pain may come and go if the thrombus forms suddenly, long-standing clot build-up can also develop without causing symptoms, leading to portal hypertension before it is diagnosed. [4] [2] Other symptoms can develop based on the cause.
In medicine, the fluid wave test or fluid thrill test is a test for ascites (free fluid in the peritoneal cavity). It is performed by having the patient (or a colleague) push their hands down on the midline of the abdomen. The examiner then taps one flank, while feeling on the other flank for the tap.
Ascites is most commonly a complication of cirrhosis of the liver. [1] It can also occur in patients with nephrotic syndrome. [3] [4] SBP has a high mortality rate. [5] The diagnosis of SBP requires paracentesis, a sampling of the peritoneal fluid taken from the peritoneal cavity. [6]
Bile, pus, or blood released from viscera anywhere along its length may run along the paracolic gutter, and collect in sites quite remote from the organ of origin. [2] In supine patients, infected fluid from the right iliac fossa may ascend in the paracolic gutter to enter the lesser sac.