domingo, 20 de febrero de 2011
Hypernatremia, Liquids and electrolites Manual (Constain, Alfred)
sábado, 19 de febrero de 2011
Hypercalcemia - NEJM, liquids and electrolytes manual
Ninety percent of cases of hypercalcemia overall are due to primary hyperparathyroidism or a malignant condition, but of those due to the latter, less than 1% are a consequence of Hodgkin's lymphoma.4 Similarly, among patients with Hodgkin's lymphoma, only 5% have hypercalcemia.5Hypercalcemia of malignancy typically occurs through the following mechanisms: a humoral effect mediated by PTHrP, osteolytic metastases, or ectopic 1-alpha-hydroxylation of 25-hydroxyvitamin D resulting in increased calcitriol levels.6 This last mechanism is characteristic of Hodgkin's lymphoma 7; the extrarenal production of calcitriol by the lymphoma or tumor-infiltrating macrophages substantially increases absorption of calcium from the intestine, raising the serum calcium level. In the normal state, 1-alpha-hydroxylase converts 25-hydroxyvitamin D to calcitriol under the control of PTH, in response to hypocalcemia. In contrast, the 1-alpha-hydroxylase in lymphoma cells or tumor-infiltrating macrophages is poorly sensitive to feedback from circulating PTH, leading to inappropriate calcitriol production.8
All patients with severe hypercalcemia require treatment to correct the serum calcium concentration, to restore euvolemia, and to address the underlying disease process. Volume resuscitation is central to recovery, followed by therapy to inhibit bone resorption, target the underlying cause of hypercalcemia, and induce calciuresis.9,10 In patients with calcitriol-mediated hypercalcemia, glucocorticoids are the therapy of choice, reducing calcitriol production by macrophages and typically correcting the serum calcium within 3 to 5 days after the initial dose.11For hypercalcemia of malignancy, bisphosphonates are the principal treatment — in particular, the potent agent zoledronic acid.
In this case, the elevated calcitriol level, with low levels of PTH and PTHrP, suggested lymphoma as the cause of the hypercalcemia and ultimately led to imaging, visualization of adenopathy not palpable on physical examination, definitive tissue diagnosis, and effective therapy. This case underscores the importance of measuring calcitriol levels while one searches for the underlying cause of hypercalcemia in cases unexplained by a high level of PTH or PTHrP
miércoles, 16 de febrero de 2011
LIVER ABSCESS - SCHWARTZ'S 2010 REVIEW
Pyogenic liver abscesses also occur as a result of impaired biliary drainage, hematogenous infection arising from sources such as
IV drug abuse and teeth cleaning, and local spread of infection (diverticulitis or Crohn's disease). Pyogenic hepatic abscesses may be single or multiple and are more frequently found in the right lobe of the liver.41 The
abscess cavities are variable in size and, when multiple, may coalesce to give a honeycomb appearance. Approximately 40% of abscesses
are monomicrobial, an additional 40% are polymicrobial, and 20% are culture negative. The most common infecting agents are gramnegative
organisms. Escherichia coli is found in two thirds, and Streptococcus faecalis, Klebsiella, and Proteus vulgaris are also common.
Anaerobic organisms such as Bacteroides fragilis are also seen frequently. Staphylococcus and Streptococcus are more common in patients
with endocarditis and infected indwelling catheters
Patients usually are symptomatic with right upper quadrant pain and fever. Jaundice occurs in up to one third of affected patients. A
thorough history and physical examination are necessary to attempt to localize the primary causative site. Leucocytosis, an elevated
sedimentation rate, and an elevated alkaline phosphatase (AP) level are the most common laboratory findings. Significant abnormalities in
the results of the remaining liver function tests are unusual. Blood cultures reveal the causative organism in approximately 50% of cases.
Ultrasound examination of the liver reveals pyogenic abscesses as round or oval hypoechoic lesions with well-defined borders and a variable
number of internal echoes. CT scan is highly sensitive in the localization of pyogenic liver abscesses. The abscesses are hypodense and may
contain air-fluid levels indicating a gas-producing infectious organism as well as peripheral enhancement (Fig. 31-19). MRI of the abdomen
also can detect pyogenic abscesses with a high level of sensitivity but plays a limited role because of its inability to be used for imageguided
diagnosis and therapy.
The current cornerstones of treatment include correction of the underlying cause, needle aspiration, and IV antibiotic therapy. On
presentation, percutaneous aspiration and culture of the aspirate may be beneficial to guide subsequent antibiotic therapy. Initial antibiotic
therapy needs to cover gram-negative as well as anaerobic organisms. Aspiration and placement of a drainage catheter is beneficial for only
a minority of pyogenic abscesses, because most are quite viscous and drainage is ineffective. Antibiotic therapy must be continued for at
least 8 weeks. Aspiration and IV antibiotic therapy can be expected to be effective in 80 to 90% of patients. If this initial mode of therapy
fails, the patients should undergo surgical therapy, including laparoscopic or open drainage.
Amebic Abscess
Entamoeba histolytica is a parasite that is endemic worldwide, infecting approximately 10% of the world's population. Amebiasis is most
common in subtropical climates, especially in areas with poor sanitation. E. histolytica exists in a vegetative form and as cysts capable of
surviving outside the human body. The cystic form passes through the stomach and small bowel unharmed and then transforms into a
trophozoite in the colon. Here it invades the colonic mucosa forming typical flask-shaped ulcers, enters the portal venous system, and is
carried to the liver. Occasionally, the trophozoite will pass through the hepatic sinusoid and into the systemic circulation, which results in
lung and brain abscesses.
Amebae multiply and block small intrahepatic portal radicles with consequent focal infarction of hepatocytes. They contain a proteolytic
enzyme that also destroys liver parenchyma. The abscesses formed are variable in size and can be single or multiple. The amebic abscess is
most commonly located in the superior-anterior aspect of the right lobe of the liver near the diaphragm and has a necrotic central portion
that contains a thick, reddish brown, pus-like material. This material has been likened to anchovy paste or chocolate sauce. Amebic
abscesses are the most common type of liver abscesses worldwide.
Ultrasound and CT scanning of the abdomen are both very sensitive but nonspecific for the detection of amebic abscesses.41 CT scanning
also is useful in detecting extrahepatic involvement. Amebic abscesses usually appear as well-defined low-density round lesions that have
enhancement of the wall. They also usually appear somewhat ragged in appearance with a peripheral zone of edema. The central cavity
may have septations as well as fluid levels.
Metronidazole 750 mg tid for 7 to 10 days is the treatment of choice and is successful in 95% of cases. Defervescence usually occurs in 3 to
5 days. The time necessary for the abscess to resolve depends on the initial size at presentation and varies from 30 to 300 days.41 Both
ultrasound and CT of the liver can be used as follow-up after the initiation of medical therapy. Aspiration of the abscess is rarely needed
and should be reserved for patients with large abscesses, abscesses that do not respond to medical therapy, abscesses that appear to be
superinfected, and abscesses of the left lobe of the liver that may rupture into the pericardium.
Hydatid disease is due to the larval or cyst stage of infection by the tapeworm Echinococcus granulosus, which lives in the dog.42 Humans,
sheep, and cattle are intermediate hosts. The dog is infected by eating the viscera of sheep that contain hydatid cysts. Scolices, contained in
the cysts, adhere to the small intestine of the dog and become adult taenia, which attach to the intestinal wall. Each worm sheds
approximately 500 ova into the bowel. The infected ova-containing feces of the dog contaminate grass and farmland, and the ova are
ingested by sheep, pigs, and humans. The ova have chitinous envelopes that are dissolved by gastric juice. The liberated ovum burrows
through the intestinal mucosa and is carried by the portal vein to the liver, where it develops into an adult cyst. Most cysts are caught in
the hepatic sinusoids, and 70% of hydatid cysts form in the liver. A few ova pass through the liver and are held up in the pulmonary
capillary bed or enter the systemic circulation, forming cysts in the lung, spleen, brain, or bones.
The uncomplicated cyst may be silent and found only at autopsy or
incidentally. Occasionally, the affected patient presents with dull right upper quadrant pain or abdominal distention. Cysts may become
secondarily infected, involve other organs, or even rupture, which leads to an allergic or anaphylactic reaction.
The diagnosis of hydatid disease is based on the findings of an enzyme-linked immunosorbent assay (ELISA) for echinococcal antigens, and
results are positive in approximately 85% of infected patients.42 The ELISA results may be negative in an infected patient if the cyst has not
leaked or does not contain scolices, or if the parasite is no longer viable. Eosinophilia of >7% is found is approximately 30% of infected
patients. Ultrasonography and CT scanning of the abdomen are both quite sensitive for detecting hydatid cysts. The appearance of the cysts
on images depends on the stage of cyst development. Typically, hydatid cysts are well-defined hypodense lesions with a distinct wall. Ringlike
calcifications of the pericysts are present in 20 to 30% of cases. As healing occurs, the entire cyst calcifies densely, and a lesion with
this appearance is usually dead or inactive. Daughter cysts generally occur in a peripheral location and are typically slightly hypodense
compared with the mother cyst. MRI of the abdomen may be useful to evaluate the pericyst, cyst matrix, and daughter cyst characteristics.
Unless the cysts are small or the patient is not a suitable candidate for surgical resection, the treatment of hydatid disease is surgically
based because of the high risk of secondary infection and rupture. Medical treatment with albendazole relies on drug diffusion through the
cyst membrane. The concentration of drug achieved in the cyst is uncertain but is better than that of mebendazole, and albendazole can be
used as initial treatment for small, asymptomatic cysts. For most cysts surgical resection involving laparoscopic or open complete cyst
removal with instillation of a scolicidal agent is preferred and usually is curative. If complete cystectomy is not possible, then formal
anatomic liver resection can be used.
Ascariasis
Ascaris infection is particularly common in the Far East, India, and South Africa. Ova of the roundworm Ascaris lumbricoides arrive in the
liver by retrograde flow in the bile ducts. The adult worm is 10 to 20 cm long and may lodge in the common bile duct, producing partial bile
duct obstruction and secondary cholangitic abscesses. The ascaris may be a nucleus for the development of intrahepatic gallstones. The
clinical presentation in an affected patient may include any of the following: biliary colic, acute cholecystitis, acute pancreatitis, or hepatic
abscess.43 Plain abdominal radiographs, abdominal ultrasound, and endoscopic retrograde cholangiography (ERCP) all can demonstrate the
ascaris as linear filling defects in the bile ducts. Occasionally worms can be seen moving into and out of the biliary tree from the duodenum.
Treatment consists of administration of piperazine citrate, mebendazole, or albendazole in combination with ERCP extraction of the worms.
Failure of endoscopic extraction warrants surgical removal of the áscaris.
Schistosomiasis
Schistosomiasis affects >200 million people in 74 countries. Hepatic schistosomiasis is usually a complication of the intestinal disease,
because emboli of schistosomiasis ova reach the liver via the mesenteric venous system. Eggs excreted in the feces hatch in water to
release free-swimming embryos, which enter snails and develop into fork-tailed cercariae. They then re-enter human skin during contact
within infected water. They burrow down to the capillary bed, and at that point there is widespread hematogenous dissemination. Those
entering the intrahepatic portal system grow rapidly, and a granulomatous reaction occurs. The degree of resultant portal fibrosis is related
to the adult worm load.
Schistosomiasis has three stages of clinical symptomatology: the first includes itching after the entry of cercariae through the skin; the
second includes fever, urticaria, and eosinophilia; and the third involves hepatic fibrosis followed by presinusoidal portal hypertension.
During this third phase the liver shrinks, the spleen enlarges, and the patient may develop complications of portal hypertension while
hepatic function is maintained. Active infection is detected by stool examination. Serologic tests indicate past exposure without specifics
regarding timing. A negative serologic test result rules out schistosomal infection. Serum levels of transaminases are usually normal, but the
AP level may be mildly elevated. A decreased serum albumin level is usually the result of frequent GI bleeds and decreased nutrition.
Medical treatment of schistosomiasis includes education regarding hygiene and the avoidance of infected water. Treatment with praziquantel
40 to 75 mg/kg as a single dose is the treatment of choice for all forms of schistosomiasis and produces few side effects. GI bleeding
usually is controlled by endoscopic variceal ligation. However, in a patient with refractory GI portal hypertensive bleeding, distal splenorenal
shunt or gastric devascularization and splenectomy need to be considered.
lunes, 14 de febrero de 2011
SPLEEN TRAUMA
Management of spleen (closed) trauma
· Spleen trauma in the majority of cases can be managed
with non operative management.
· A patient with spleen trauma unstable goes for a FAST, if is
positive then goes for operating room
· A patient with spleen trauma stable goes for a CT, if there is
bleeding or if the score of spleen injury is III or more, then the
angioembolization or the surgery is indicated.
The decision to employ the NOM pathway for
blunt splenic injury requires the patient to meet several
criteria. The first and foremost is hemodynamic
stability with the absence of any suspected associated
intra-abdominal injury
Certainly there are several clear absolute
contraindications which include the patient who is
receiving or will receive systemic anticoagulation.
Special consideration is in order for injured pregnant
women with viable preterm fetuses who would not
tolerate the stress of NOM failure. Also the patient
with multiple injuries or traumatic brain injury with
a mid to high grade splenic injury poses a particular
challenge to NOM.
The question of where to admit should be based
on injury grade. It is our institutional practice to admit
all injuries grade III or above to the intensive care unit.
Grade I and II injuries can be admitted to a less intensive
monitored setting. Certain grade I injuries may not
require admission and observation, but always while
taking into account that CT is notorious for underestimating
injury. The period of observation is debatable
and the clinical condition and progress of the patient
should play a role in deciding duration. Multiple studies
have concluded that most failures of NOM occur in
the first 72 hours of admission. Smith and colleagues
suggest that if hematocrit and pulse are stable after 48
hours, then patients can be ambulated and fed.8 The
hematocrit should be checked frequently for high grade
injuries and less frequently for grade I and II injuries
miércoles, 9 de febrero de 2011
ACUTE PANCREATITIS - WORLD OF GASTROENTEROLOGY REVIEW
The mean age of the first attack was in the 6th
decade. This outcome can be explained by an increasing
incidence of gallstone pancreatitis among white women
over the age of 60 years[9,10]. The most common causes
were gallstones (11%-56%), idiopathic (8%-44%) and
alcohol (3%-66%). However, occult microlithiasis is
probably responsible for most cases of idiopathic AP
Overa
ll, severe AP (SAP) occurs in 10%-20% of
patients and despite improvements in critical care
between 10% and 25% of patients with SAP die
The pathogenesis of AP is caused by an inappropriate
activation of trypsinogen to trypsin. Once activated
these enzymes are responsible of autodigestion of
pancreatic tissues resulting in necrosis of the acini
and pancreatic islets with interstitial fat necrosis and
necrotizing vasculitis[SIRS may develop into acute respiratory
distress syndrome or multiorgan dysfunction syndrome
This systemic inflammatory response to pancreatic injury
marks the “first or early phase” of the n
atural course of
SAP, which normally characterizes the first 14 d of the
disease[21,22]. In this phase, organ failure is common and
often is not associated with infection[23]. The “second
or late phase” which starts 14 d after the onset of th
e
disease, is marked by infection of the gland, necrosis
and septic systemic complications causing a significant
increase in mortality[
Abdominal pain together with elevation of plasma levels
of pancreatic enzymes is the cornerstone of diagnosis.
The pain normally is generalized in the upper abdomen
and occurs suddenly without a prodrome. The pain,
which tends to last a few days, is often radiated in a
bandlike manner to the lower thoracic region of the back.
Nausea and vomiting normally appear in about
90%
of patients and can be severe.
Physical signs of severe
disease such as ecchymoses in the flank (Gray-Turner’s
sign) or in the periumbilical region (Cullen sign) occurs in
less than 3% of patients, and have been associated with a
mortality of 37%
Levels peak early,
and decline over 3-4 d. As a consequence, the diagnosis
should not rely on arbitrary levels 3 or 4 times greater
than normal, but levels should be interpreted in light of
the time since the onset of abdominal pain.
Enzymes released by acinar cells during an attack of AP
are amylase and lipase, and their con
centration in the serum
is used to confirm the diagnosis[28]. The half-life of elevated
amylase is shorter than that of lipase: the diagnosis using
plasma lipase has slightly superior sensitivity and specificity
and greater overall accuracy than amylase
In order to optimize the instant management and prevent
recurrence of AP it is essential identify the aetiology.
In the Western world, biliary tract disease (38%)
and alcoholism (36%) are accountable for the majority
of cases of AP[33]. However, in up to 10% of cases, the
cause of AP remains unknown (idiopathic AP).
Gallstones
In patients with no history of alcohol consumption, an
increased level of serum alanine aminotransferase up to 3
times its normal value is indicative of g
allstone pancreatitis.
Gallstone pancreatitis, in most cases, is caused by
gallstones passing into the bile duct and temporarily
lodging at the sphincter of Oddi. However, duct
obstruction can also be localized in the pancreatic duct.
Although not completely proven, it is thought that duct
obstruction leads to increased pancreatic duct pressure
with subsequence injury to acinar cells and activation
of digestive enzymes. It is supposed that only gallstones
with a diameter up to 5 mm can migrate distally into the
biliary duct whilst gallstones with a diameter of 8 mm or
more remain in the gallbladder[
In cases where a biliary aetiology is
suspected, the
first line of investigation should be a trans-abdominal
ultrasound (T-A US). The value of U
S lies in its ability
to demonstrate gallbladder stones and dilatation of
the CBD as well as other pathology unrelated to the
pancreas. In the case of high clinical suspicion of a biliary
cause of AP with normal T-A US, magnetic resonance
cholangiopancreatography or endoscopic US should
be performed in order to visualize the presence of
microlithiasis or other causes of duct obstruction.
Alcohol
Alcohol consumption is the second cause of AP.
Although the acinar cell is considered the main target of
damage by ethanol, there is not an accepted explanation
for why some patients are more p
redisposed to developing
AP than others who consume similar quantities of
alcohol. The pathogenesis of alcohol pancreatitis can be
explained by a combination of environmental and genetic
factors. Genetic studies have suggested that, in hereditary
pancreatitis, mutation of the cationic trypsinogen gene
and serine peptidase inhibitor, Kazal type 1 (SPINK1)
genes can promote AP in the presence of alcohol[36].
Post-ERCP acute pancreatitis
The risk of developing AP after endoscopic retrograde
cholangiopancreatography (ERCP) is around 5%[37].
The main risk factors for post-ERCP AP incl
ude female
gender, presence of periampullary divertic
ulum, and
procedure-related factors such as a cannulation time of
more than 10 min and major papilla sphincterotomy.
However, the risk of developing asymptomatic hyperamylasemia,
which appears in 35%-70% of patients,
seems to be linked with procedure-related factors
Trauma
Drug-induced pancreatitis
Drug-induced pancreatitis is considered a rare event
(0.1%-2%) and is normally mild and self-limiting. In the
literature, the true incidence of drug-induced AP is not
known since the evidence is derived mainly from case
reports and the diagnosis is always challenging because
of the difficulty in distinguishing the effects of drugs
from other causes of AP[40].
Dr ugs strongly associated with AP include
azathioprine, sulfonamides, sulindac, tetracycline, valproic
acid, didanosine, methyldopa, estrogens, furosemide,
6-mercaptopurine, pentamidine, 5-aminosalicylic acid
compounds, corticosteroids, and octreotide.
Infections
Infections are accountable for less than 1% of all AP
and tend to be milder than biliary and alcohol-induced
AP[41]. Viral infections such as Epstein-Barr, coxsackie
virus, echovirus, varicella-zoster and measles are the most
common causes of infectious AP especially in children.
Bacterial causes include Mycoplasma pneumoniae,
Salmonella typhosa, Leptospira, Campyloba
cter and Mycobacterium
tuberculosis.
Worldwide, ascariasis can cause AP by migration of
worms in and out of the duodenal papillae.
Hereditary pancreatitis
Hereditary pancreatitis is an autosomal dominant gainof-
function disorder related to mutations of the cationic
trypsinogen gene (PRSS1), which has an 80% penetrance.
Mutations in this gene cause premature conversion
of trypsinogen to active trypsin causing pancreatic
autodigestion. This genetic syndrome is associated with a
high risk of developing chronic pancreatitis at a young age
and of developing pancreatic cancer[42].
Mutations in the SPINK1 gene, which blocks the
active binding site of trypsin, rendering
it inactive, are
associated with acute and chronic pancreatitis. Patients
who have severe SPINK1 mutations normally develop
chronic pancreatitis in childhood[43].
In patients with mild CFTR gene mutations, an
increased risk of developing acute and chronic pancreatitis
has been observed in comparison with the general
population.
Hypercalcemia
Hypercalcemia and primary hyperparathyroidism can
lead to AP. Hypercalcemia, which causes less than 1% of
all cases of pancreatitis, normally appears with excessive
doses of vitamin D, familial hypocalciuric hypercalcemia
and total parenteral nutrition.
Hypertriglyceridemia
AP usually does not occur until serum
triglyceride levels
reach 1000 mg/dL. Hypertriglyceridemia causes about 2%
of AP and it is normally associated with type Ⅰ, Type Ⅱ
and Type Ⅴ hyperlipidemia. The triglyceride level should
be measured as soon as clinical presentation of AP appears
since this level tends to decline during hospitalization
because of fasting and Ⅳ fluid resuscitation.
Acquired hypertriglyceridemia can appear in adults
because of alcoholism, obesity and poorly controlled
diabetes mellitus.
In order to prevent recurrent attacks of AP, the
patient should be placed on a low-fat diet, a re
gular
exercise regimen, and tight control of diabetes, with use
of lipid-lowering drugs such as statins.
Developmental abnormalities of the pancreas
The pancreas develops from two buds stemming from
the alimentary tract of the developing embryo.
Pancreas divisum is a failure of the dorsal and ventral
pancreatic ducts to fuse during embryogenesis and it occurs
in about 5%-7% of the healthy population. Pancreatitis
appears only in 5% of patients with pancreas divisum and
it is thought to be the result of ductal hypertension caused
Tumor
Obstruction of the pancreatic ductal system by a tumor
can increase the intraduct pressure and causing AP in
proximately 14% of patients suffering from pancreatic
tumors
Autoimmune pancreatitis
This relatively newly described entity is an extremely rare
cause of AP. The diagnosis of autoimmune pancreatitis
has to be confirmed by specific radiological and
histological findings. Radiologically, there is a focal mass in
the pancreatic head on computed tomography (CT) scan
and irregular narrowing of the proximal pancreatic duct
on ERCP.
PREDICTION OF SEVERITY
Although, the majority of patients have a mild episode of
AP, it is difficult to identify the patients who are at risk of
developing severe disease on admission to the hospital.
There is agreement that there is still a need for an
early objective measure of severity. Clinical examination
in the first 24 h of admission although specific, lacks
sensitivity and hence is unreliable and should be
supported by objective measures[46].
Although there is no ideal single serum marker for predicting
severity, C-reactive protein (cut-off of 150 mg/L)
is a useful indicator of necrosis with a sensitivity and
specificity of 80% but is required to be measured more
than 48 h after the onset of symptoms[
In 1974, John Ranson selected 11 prognostic signs
based on statistical analysis of 43 parameters gathered
retrospectively from 450 AP patients. Five of these
criteria are measured on admission and the remaining 11
are measured 48 h post admission (Table 1).
In most cases AP is mild and its initial management
is directed towards maintenance of adequate organ
perfusion in order to reduce the systemic complications
caused by the pancreatic injury. This consists of fluid
resuscitation, analgesia, oxygen administration, antiemetics
and repeated evaluation of the patient’s vital signs with
the intention of identifying early manifestations of organ
dysfunction.
Adequate pain control is essential. Parenteral analgesia
is usually needed with an advantage in using patientcontrolled
analgesia. Opiates are normally used including
morphine and meperidine. Since there are no studies
directly comparing the effects of meperidine or morphine
on sphincter of Oddi manometry, morphine seems to
Although antiprotease treatment has
been successful in experimental pancreatitis, it has not been
shown to offer a survival benefit, but only a reduction of
the incidence of complications in human disease
All patients (EARLY)should have thrombo-prophylaxis with
low molecular weight heparin; however the decision to
begin stress ulcer prophylaxis is still debatable.
An important issue in the early treatment of SAP is
the optimal delivery of nutrition. After initial enthusiasm
towards parenteral nutrition (PN), recent guidelines
advise early enteral nutrition (EN) through a nasojejunal
tube[88]. Patients with AP are characterized by loss of
the gut barrier function which is involved in both local
and systemic infectious complications[
However, a recent meta-analysis by Petrov et al[97]
demonstrated that early ERCP with or without ES had
no beneficial effect in patients with predicted mild or
severe ABP without cholangitis. The conclusion of this
study was partially supported by the 2007 guidelines of
the American Gastroenterology Association which stated
that early ERCP in patient with severe ABP without
signs of acute cholangitis is still not uniformly accepted
in the literatura
MANGEMENT OF SAP: “LATE PHASE”
The main life-threatening event which characterizes the
late phase of SAP is infection of the necrotic pancreatic
parenchyma. Infection tends to occur in 10% to 50% of
patients with necrotizing pancreatitis and develops 2-3
wk after the onset of symptoms[26,106-108]. The mortality
increases from 5%-25% in patients with sterile necrosis
to 15%-28% when infection occurs
Despite the requirement for further multicenter
double-blind studies, the use of prophylactic antibiotics
in patients with proven necrotic pancreatitis on CT
has been advocated. β-lactam agents are preferred to
quinolones and the length of the therapy has to be at
least 2 wk (