icd10 | - |
---|---|
icd9 | - |
medlineplus | 000256 |
diseasesdb | 885 |
emedicinesubj | med |
emedicinetopic | 3430 |
emedicine mult | |
meshname | Appendicitis |
meshnumber | C06.405.205.099 }} |
Appendicitis a condition characterized by inflammation of the appendix. It is classified as a medical emergency and many cases require removal of the inflamed appendix, either by laparotomy or laparoscopy. Untreated, mortality is high, mainly because of the risk of rupture leading to peritonitis and shock. Reginald Fitz first described acute and chronic appendicitis in 1886, and it has been recognized as one of the most common causes of severe acute abdominal pain worldwide. A correctly diagnosed non-acute form of appendicitis is known as "rumbling appendicitis".
The term "pseudoappendicitis" is used to describe a condition mimicking appendicitis. It can be associated with ''Yersinia enterocolitica''.
The causative agents include foreign bodies, trauma, intestinal worms, lymphadenitis, and most commonly calcified fecal deposits known as appendicoliths or fecaliths The occurrence of an obstructing fecalith has attracted attention since their presence in patients with appendicitis is significantly higher in developed than in developing countries, and an appendiceal fecalith is commonly associated with complicated appendicitis. Also, fecal stasis and arrest may play a role, as demonstrated by a significantly lower number of bowel movements per week in patients with acute appendicitis compared with healthy controls. The occurrence of a fecalith in the appendix seems to be attributed to a right sided fecal retention reservoir in the colon and a prolonged transit time. From epidemiological data it has been stated that diverticular disease and adenomatous polyps were unknown and colon cancer exceedingly rare in communities exempt for appendicitis. Also, acute appendicitis has been shown to occur antecedent to cancer in the colon and rectum. Several studies offer evidence that a low fiber intake is involved in the pathogenesis of appendicitis . This is in accordance with the occurrence of a right sided fecal reservoir and the fact that dietary fiber reduces transit time.
Blood Test Most patients suspected of having appendicitis would be asked to do a blood test. 50% of the time, the blood test may be normal, so it is not foolproof in diagnosing appendicitis.
Two form of blood tests are commonly done: FBC (Full blood count) or CBC (Complete blood count), is an inexpensive and commonly requested blood test. It involves measuring the blood for its richness in red blood cells as well as the number of the various white blood cell constituents in it. The number of white cells in the blood is a usually less than 10,000 cells per cubic millimeter. An abnormal rise in the number of white blood cells in the blood is a crude indicator of infection or inflammation going on in the body. Such rise is not specific to appendicitis alone. If it is abnormally elevated, with a good history and examination findings pointing towards appendicitis, the likelihood of having the disease is higher. In pregnancy, there may be a normal elevation of white blood cells, without any infection present.
CRP is an acronym for C-reactive protein. It is an acute phase response protein produced by the liver in response to any infection or inflammatory process in the body. Again, like the FBC, it is not a specific test. It is another crude marker of infection or inflammation. Inflammation at ANY site can lead to the CRP to rise. A significant rise in CRP with corresponding signs and symptoms of appendicitis is a useful indicator in the diagnosis of appendicitis.It is said that if CRP continues to be normal after 72 hours of the onset of pain, it is likely that the appendicitis will resolve on its own without intervention. A worsening CRP with good history is a sure signal of impending perforation or rupture and abscess formation.
Urine Test: Urine test in appendicitis is usually normal. It may however show blood if the appendix is rubbing on the bladder, causing irritation A urine test or urinalysis is compulsory in women, to rule out pregnancy in appendicitis, as well to help ensure that the abdominal pain felt and thought to be acute appendicitis is not in fact, due to ectopic pregnancy.
X – Ray In 10% of patients with appendicitis, plain abdominal x-ray may demonstrate hard formed feces in the lumen of the appendix (Fecolith). It is agreed that the finding of Fecolith in the appendix on X – ray alone is a reason to operate to remove the appendix, because of the potential to cause worsening symptoms. In this respect, a plain abdominal X-ray may be useful in the diagnosis of appendicitis, though plain abdominal x- ray is no longer requested routinely in suspected cases of appendicitis. An abdominal X – ray may be done with a barium enema contrast to diagnose appendicitis. Barium enema is whitish toothpaste like material that is passed up into the rectum to act as a contrast. It will usually fill the whole of the large bowel. In normal appendix, the lumen will be present and the barium fills it up and is seen when the x-ray film is shot. In appendicitis, the lumen of the appendix will not be visible on the barium film.
In places where it is readily available, CT scan has become frequently used, especially in adults whose diagnosis is not obvious on history and physical. Concerns about radiation, however, tend to limit use of CT in pregnant women and children. A properly performed CT scan with modern equipment has a detection rate (sensitivity) of over 95% and a similar specificity. Signs of appendicitis on CT scan include lack of oral contrast (oral dye) in the appendix, direct visualization of appendiceal enlargement (greater than 6 mm in cross sectional diameter), and appendiceal wall enhancement with IV contrast (IV dye). The inflammation caused by appendicitis in the surrounding peritoneal fat (so called "fat stranding") can also be observed on CT, providing a mechanism to detect early appendicitis and a clue that appendicitis may be present even when the appendix is not well seen. Thus, diagnosis of appendicitis by CT is made more difficult in very thin patients and in children, both of whom tend to lack significant fat within the abdomen. The utility of CT scanning is made clear, however, by the impact it has had on negative appendectomy rates. For example, use of CT for diagnosis of appendicitis in Boston, MA has decreased the chance of finding a normal appendix at surgery from 20% in the pre-CT era to only 3% according to data from the Massachusetts General Hospital.
! Symptoms | ! |
Migratory right iliac fossa pain | 1 point |
1 point | |
Nausea and vomiting | 1 point |
!Signs | ! |
2 points | |
Rebound tenderness | 1 point |
Fever | 1 point |
!Laboratory | ! |
Leukocytosis | 2 points |
Shift to left (segmented neutrophils) | 1 point |
!Total score | !10 points |
A score below 5 is strongly against a diagnosis of appendicitis, while a score of 7 or more is strongly predictive of acute appendicitis. In patients with an equivocal score of 5-6, CT scan is used in the USA to further reduce the rate of negative appendicectomy.
Matrix metalloproteinase (MMP) levels can be used as biomarkers of increased risk of appendiceal rupture among patients with acute appendicitis according to a cohort study. MMP-1 was higher in gangrenous (p<0.05) and perforated appendicitis (p<0.01) compared with controls. MMP-9 was most abundantly expressed in inflamed appendix and reached a tenfold higher expression in all groups with appendicitis compared with controls (p<0.001).
Periappendicits, inflammation of tissues around the appendix, is often found in conjunction with other abdominal pathology.
In girls:
In adults:
In elderly:
Once the decision to perform an appendectomy has been made, the preparation procedure takes more or less one to two hours. Meanwhile, the surgeon will explain the surgery procedure and will present the risks that must be considered when performing an appendectomy. With all surgeries there are certain risks that must be evaluated before performing the procedures. However, the risks are different depending on the state of the appendix. If the appendix has not ruptured, the complication rate is only about 3% but if the appendix has ruptured, the complication rate rises to almost 59%. The most usual complications that can occur are pneumonia, hernia of the incision, thrombophlebitis, bleeding or adhesions. Recent evidence indicates that a delay in obtaining surgery after admission results in no measurable difference in patient outcomes
The surgeon will also explain how long the recovery process should take. Abdomen hair is usually removed in order to avoid complications that may appear regarding the incision. In most of the cases patients experience nausea or vomiting which requires specific medication before surgery. Antibiotics along with pain medication may also be administrated prior to appendectomies.
In the past (and in some medical textbooks that are still published today), it was commonly accepted among the majority of academic sources that pain medication ''not'' be given until the surgeon has the chance to evaluate the patient, so as to not "corrupt" the findings of the physical examination. This line of practice, combined with the fact that surgeons may sometimes take hours to come to evaluate the patient, especially if he or she is in the middle of surgery or has to drive in from home, often leads to a situation that is ethically questionable at best. More recently, due to better understanding of the importance of pain control in patients, it has been shown that the physical examination is actually not that dramatically disturbed when pain medication is given prior to medical evaluation. Individual hospitals and clinics have adapted to this new approach of pain management of appendicitis by developing a compromise of allowing the surgeon a maximum time to arrive for evaluation, such as 20 to 30 minutes, before active pain management is initiated. Many surgeons also advocate this new approach of providing pain management immediately rather than only after surgical evaluation.
According to a meta-analysis from the Cochrane Collaboration comparing laparoscopic and open procedures, laparoscopic procedures seem to have various advantages over the open procedure. Wound infections were less likely after laparoscopic appendicectomy than after open appendicectomy (odds ratio (OR) 0.45; confidence interval (CI) 0.35 to 0.58), but the incidence of intraabdominal abscesses was increased (OR 2.48; CI 1.45 to 4.21). The duration of surgery was 12 minutes (CI 7 to 16) longer for laparoscopic procedures. Pain on day 1 after surgery was reduced after laparoscopic procedures by 9 mm (CI 5 to 13 mm) on a 100 millimeter visual analogue scale. Hospital stay was shortened by 1.1 day (CI 0.6 to 1.5). Return to normal activity, work, and sport occurred earlier after laparoscopic procedures than after open procedures. While the operation costs of laparoscopic procedures were significantly higher, the costs outside hospital were reduced. Young female, obese, and employed patients seem to benefit from the laparoscopic procedure more than other groups.
There is debate whether emergency appendicectomy (within 6 hours of admission) reduces the risk of perforation or complication versus urgent appendicectomy (greater than 6 hours after admission). According to a retrospective case review study no significant differences in perforation rate among the two groups were noted (P=.397). Various complications (abscess formation, re-admission) showed no significant differences (P=0.667, 0.999). According to this study, beginning antibiotic therapy and delaying appendicectomy from the middle of the night to the next day does not significantly increase the risk of perforation or other complications. This finding is important not simply for the convenience of the surgeons and staff involved but for the fact that there have been other studies that have shown that surgeries taking place during the night, when people may be more tired and there are fewer staff available, have higher rates of surgical complications.
Findings at the time of surgery are less severe in typical appendicitis. With atypical histories, perforation is more common and findings suggest perforation occurs at the beginning of symptoms. These observations may fit a theory that acute (typical) appendicitis and suppurative (atypical) appendicitis are two distinct disease processes. (1)
Surgery may last from 30 minutes in typical appendicitis in thin patients to several hours in complicated cases.
Three of the differences between the two groups reached the standard measure of statistical significance. The first was in the total number of health care visits needed before the child had recovered. In the initial operation group, the average number of health care visits needed was 2.8, while in the initial nonoperative group the average number of health care visits was 4.1. The second was the difference between the groups in the amount of time the child needed after being admitted to the hospital to eat a normal diet again. Children in the initial operation group needed 74.8 hours before they ate a regular diet, while children in the initial nonoperative group needed 23.3 hours. Finally, the average number of CT scans the child received was 1.5 in the initial operation group, and 2.1 in the initial nonoperative group.
On average, the operating time in the initial operative group was twenty minutes longer than in the initial nonoperative group. The average operative time was 62.1 minutes for the initial operation group and 42 minutes for the initial nonoperative group. This difference, however, did not reach the normal requirement for statistical significance used in the medical literature. Thus the authors did not conclude there was any difference in the operating time between the two groups, on average.
During a traditional appendectomy procedure, the patient is placed under general anesthesia in order to keep his/her muscles completely relaxed and to keep the patient unconscious. The incision is two to three inches (76 mm) long and it is made in the right lower abdomen, several inches above the hip bone. Once the incision opens the abdomen cavity and the appendix is identified, the surgeon removes the infected tissue and cuts the appendix from the surrounding tissue. After the surgeon inspects carefully and closely the infected area and there are no signs that surrounding tissues are damaged or infected, he will start closing the incision. This means sewing the muscles and using surgical staples or stitches to close the skin up. In order to prevent infections the incision is covered with a sterile bandage. The entire procedure does not last longer than an hour if complications do not occur.
After surgery occurs, the patient will be transferred to an Post-anesthesia care unit so his or her vital signs can be closely monitored in order to detect anesthesia and/or surgery related complications. Pain medication may also be administrated if necessary. After patients are completely awake, they are moved into a hospital room to recover. Most individuals will be offered clear liquids the day after the surgery and then progress to a regular diet when the intestines start to function properly. It is highly recommended that patients sit up on the edge of the bed and walk short distances for several times a day. Moving is mandatory and pain medication may be given if necessary. Full recovery from appendectomies takes about 4 to 6 weeks but it can prolong to up to 8 weeks if the appendix had ruptured.
The real possibility of life-threatening peritonitis is the reason why acute appendicitis warrants speedy evaluation and treatment. The patient may have to undergo a medical evacuation. Appendectomies have occasionally been performed in emergency conditions (i.e., outside of a proper hospital), when a timely medical evaluation was impossible.
Typical acute appendicitis responds quickly to appendectomy and occasionally will resolve spontaneously. If appendicitis resolves spontaneously, it remains controversial whether an elective interval appendectomy should be performed to prevent a recurrent episode of appendicitis. Atypical appendicitis (associated with suppurative appendicitis) is more difficult to diagnose and is more apt to be complicated even when operated early. In either condition, prompt diagnosis and appendectomy yield the best results with full recovery in two to four weeks usually. Mortality and severe complications are unusual but do occur, especially if peritonitis persists and is untreated. Another entity known as appendicular lump is talked about quite often. It happens when appendix is not removed early during infection and omentum and intestine get adherent to it forming a palpable lump. During this period, operation is risky unless there is pus formation evident by fever and toxicity or by USG. Medical management treats the condition.
An unusual complication of an appendectomy is "stump appendicitis": inflammation occurs in the remnant appendiceal stump left after a prior incomplete appendectomy.
Category:Inflammations Category:Medical emergencies Category:General surgery Category:Diseases of appendix
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This text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
Manuel Rivas (born in A Coruña, Galicia in 1957) is a Galician writer, poet and journalist. He began his career in some Spanish newspapers like ''El Ideal Gallego'', ''La Voz de Galicia'', ''El Pais'', and was the sub-editor of ''Diario 16'' in Galicia. Rivas has written well known poems, novels, articles and literature essays.
Rivas is considered a revolutionary in contemporary Galician literature. He was a founding member of Greenpeace Spain, and played an important role during the Prestige oil spill near the Galician coast. Some of his work has been adapted to cinema, such as ''A lingua das bolboretas'' and ''O Lápis do Carpinteiro''.
Rivas's book ''Que me quieres, amor?'' (1996), a series of 16 short stories, was adapted by director Jose Luis Cuerda for his film, ''La lengua de las mariposas'' (''Butterfly''). ''O Lápis do Carpinteiro'', or ''The Carpenter's Pencil'' in English, has been published in nine countries and is the most widely translated work in the history of Galician literature.
Novels
Essays
Category:1957 births Category:Living people Category:Spanish writers Category:Galician writers Category:Galician people
br:Manuel Rivas ca:Manuel Rivas Barros es:Manuel Rivas eu:Manuel Rivas fr:Manuel Rivas ga:Manuel Rivas gl:Manuel Rivas it:Manuel Rivas pl:Manuel Rivas pt:Manuel RivasThis text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
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