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Abstract

We present two cases of peritonitis shortly after endoscopic examination of the large

bowel with polypectomy in patients on continuous ambulant peritoneal dialysis (CAPD) despite

the standard preventive measure to drain the dialysate from the abdomen prior to the procedure.

We have reviewed the current literature on this topic. These cases demonstrate that the

administration of prophylactic broad-spectrum antibiotics next to the drainage of the abdomen

prior to colonoscopy in CAPD patients should be considered as recommended in the

International Society for Peritoneal Dialysis (ISPD) guidelines 2005.


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Introduction

Peritonitis is an inflammation of the peritoneum, the thin membrane that lines the

abdominal wall and covers the organs within. The inflammation is caused by a bacterial or

fungal infection of this membrane. There are three major types of peritonitis. Primary peritonitis

is caused by the spread of an infection from the blood and lymph nodes to the peritoneum. This

type of peritonitis is rare -- less than 1% of all cases of peritonitis are primary. The more

common type of peritonitis, called secondary peritonitis, is caused when the infection comes into

the peritoneum from the gastrointestinal or biliary tract. And the last is tertiary a persistent or

recurrent infection after adequate initial therapy. These cases of peritonitis are very serious and

can be life threatening if not treated quickly.

Peritonitis is most often caused by introduction of an infection into the otherwise sterile

peritoneal environment through organ perforation, but it may also result from other irritants, such

as foreign bodies, bile from a perforated gall bladder or a lacerated liver, or gastric acid from a

perforated ulcer. Women also experience localized peritonitis from an infected fallopian tube or

a ruptured ovarian cyst. Patients may present with an acute or insidious onset of symptoms,

limited and mild disease, or systemic and severe disease with septic shock.

The peritoneum, which is an otherwise sterile environment, reacts to a variety of

pathologic stimuli with a fairly uniform inflammatory response. Depending on the underlying

pathology, the resultant peritonitis may be infectious or sterile (ie, chemical or mechanical).

Infections in the peritoneum are further divided into generalized (peritonitis) and

localized (intra-abdominal abscess). This article focuses on the diagnosis and management of

infectious peritonitis and abdominal abscesses because of the tertiary part, where the treatment is

in-adequate.


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Case Report

Peritonitis in CAPD patients after colonoscopy is a known complication. A retrospective

study from Hong Kong revealed an average risk of peritonitis after colonoscopy of 6.3% in 77

CAPD patients after 97 endoscopic procedures. Colonic biopsy or other interventions such as

polypectomies apparently did not increase the risk of peritonitis.

After colonoscopy in CAPD patients it is thought that bacteria may translocate to

mesenteric lymph nodes, then to portal circulation resulting eventually in systemic bacteraemia

with peritoneal seeding. In CAPD patients the glucose-containing fluid in the peritoneal cavity

impairs the local immune response by diluting cytokines and reducing the macrophage level. The

function of mesothelial surface and cells, another local host defence system, may be altered due

to presence of dialysis solution. Further, activated cytokines and macrophages are constantly

removed by daily changes of the dialysate. All these factors may facilitate bacterial growth in the

peritoneal cavity even with a small inoculum of bacteria.

Signs and Symptoms:

The signs and symptoms of peritonitis include:

Swelling and tenderness in the abdomen with pain ranging from dull aches to severe,

sharp pain

Fever and chills

Loss of appetite

Thirst


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Nausea and vomiting

Limited urine output

Inability to pass gas or stool

Causes:

Primary peritonitis is usually caused by liver disease. Fluid builds up in the abdomen,

creating a prime environment for the growth of bacteria.

Secondary peritonitis is caused by other conditions that allow bacteria, enzymes, or bile

into the peritoneum from a hole or tear in the gastrointestinal or biliary tracts. Such tears can be

caused by pancreatitis, a ruptured appendix, stomach ulcer, Crohn's disease, or diverticulitis.

Peritoneal dialysis, which uses the blood vessels in the peritoneum to filter waste from your

blood when your kidneys are not able to do so, also may cause peritonitis.


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Risk Factors:

The following factors may increase the risk for primary peritonitis:

Liver disease (cirrhosis)

Fluid in the abdomen

Weakened immune system

Pelvic inflammatory disease

Risk factors for secondary peritonitis include:

Appendicitis (inflammation of the appendix)

Stomach ulcers


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Torn or twisted intestine

Pancreatitis

Inflammatory bowel disease, such as Crohn's disease or ulcerative colitis

Injury caused by an operation

Peritoneal dialysis

Trauma

Diagnosis:

Peritonitis can be life threatening, so the doctor will first conduct a physical examination to

determine whether you need surgery to correct the underlying problem. The doctor will feel and

press the abdomen to detect any swelling and tenderness as well as signs that fluid has collected

in the area. The doctor may also listen to bowel sounds and check for difficulty breathing, low

blood pressure, and signs of dehydration. The following procedures also may be performed:

Blood tests -- to see if there is bacteria present in your blood

Samples of fluid from the abdomen -- identify the bacteria causing the infection

CT scan -- identifies fluid in the abdomen, or an infected organ

X-rays -- detect air in the abdomen, which indicates that an organ may be torn or

perforated.


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Etiology

Primary Peritonitis

SBP occurs in the absence of an apparent intra-abdominal source of infection and is

observed almost exclusively in patients with ascites from chronic liver disease. Contamination of

the peritoneal cavity is thought to result from translocation of bacteria across the gut wall or

mesenteric lymphatics and, less frequently, via hematogenous seeding in the presence of

bacteremia.

Approximately 10-30% of patients with cirrhosis and ascites develop SBP.1The

incidence rises with ascitic fluid protein contents of less than 1 g/dL (which occurs 15% of

patients) to more than 40%, presumably because of decreased ascitic fluid opsonic activity.


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More than 90% of cases of SBP are caused by a monomicrobial infection. The most

common pathogens include gram-negative organisms (eg,Escherichia coli [40%],Klebsiella

pneumoniae [7%],Pseudomonas species,Proteus species, other gram-negative species [20%])

and gram-positive organisms (eg, Streptococcus pneumoniae [15%], otherStreptococcus species

[15%], Staphylococcus species [3%]) (see Table 2). Anaerobic microorganisms are found in less

than 5% of cases, and multiple isolates are found in less than 10%.

Secondary peritonitis

SP is by far the most common form of peritonitis encountered in clinical practice. It is

caused by perforation or necrosis (transmural infection) of a hollow visceral organ with bacterial

inoculation of the peritoneal cavity. (See Table 1 for differential diagnoses.)

The pathogens involved in SP differ in the proximal and distal GI tract. Gram-positive organisms

predominate in the upper GI tract, with a shift toward gram-negative organisms in the upper GI

tract in patients on long-term gastric acid suppressive therapy. Contamination from a distal small

bowel or colon source initially may result in the release of several hundred bacterial species (and

fungi); host defenses quickly eliminate most of these organisms. The resulting peritonitis is

almost always polymicrobial, containing a mixture of aerobic and anaerobic bacteria with a

predominance of gram-negative organisms (see Table 2).

As many as 15% of patients who have cirrhosis with ascites who were initially presumed

to have SBP have SP. In many of these patients, clinical signs and symptoms alone are not

sensitive or specific enough to reliably differentiate between the 2 entities. A thorough history,


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evaluation of the peritoneal fluid, and additional diagnostic tests are needed to do so; a high

index of suspicion is required.

Peritoneal abscess

Peritoneal abscess describes the formation of an infected fluid collection encapsulated by

fibrinous exudate, omentum, and/or adjacent visceral organs. The overwhelming majority of

abscesses occurs subsequent to SP. Approximately half of patients develop a simple abscess

without loculation, whereas the other half of patients develop complex abscesses secondary to

fibrinous septation and organization of the abscess material. Abscess formation occurs most

frequently in the subhepatic area, the pelvis, and the paracolic gutters, but it may also occur in

the perisplenic area, the lesser sac, and between small bowel loops and their mesentery.

The incidence of abscess formation after abdominal surgery is less than 1-2%, even when

the operation is performed for an acute inflammatory process. The risk of abscess increases to

10-30% in cases of preoperative perforation of the hollow viscus, significant fecal contamination

of the peritoneal cavity, bowel ischemia, delayed diagnosis and therapy of the initial peritonitis,

and the need for reoperation, as well as in the setting of immunosuppression. Abscess formation

is the leading cause of persistent infection and development of tertiary peritonitis.

Tertiary peritonitis

Tertiary peritonitis represents the persistence or recurrence of peritoneal infection

following apparently adequate therapy for SBP or SP, often without the original visceral organ


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pathology. Patients with tertiary peritonitis usually present with an abscess, or phlegmon, with or

without fistulization. Tertiary peritonitis develops more frequently in immunocompromised

patients and in persons with significant preexisting comorbid conditions. Although rarely

observed in uncomplicated peritoneal infections, the incidence of tertiary peritonitis in patients

requiring ICU admission for severe abdominal infections may be as high as 50-74%.

Patients who develop tertiary peritonitis demonstrate significantly longer lengths of stay

in the ICU and hospital, higher organ dysfunction scores, and higher mortality rates (50-70%).

Resistant and unusual organisms (eg,Enterococcus, Candida, Staphylococcus,Enterobacter,

Pseudomonas species) are found in a significant proportion of cases of tertiary peritonitis. Most

patients with tertiary peritonitis develop complex abscesses or poorly localized peritoneal

infections that are not amenable to percutaneous drainage. Antibiotic therapy appears to be less

effective in tertiary peritonitis than in all other forms of peritonitis, and up to 90% of patients

will require reoperation for additional source control.

Tuberculous peritonitis (TP) is rare in the United States (


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positive, and culture results may be falsely negative in up to 80% of patients. A peritoneal fluid

protein level greater than 2.5 g/dL, a lactate dehydrogenase (LDH) level greater than 90 U/mL,

or a predominantly mononuclear cell count of greater than 500 cells/L should raise suspicion

but have limited specificity for the diagnosis. Laparoscopy and visualization of granulomas on

peritoneal biopsy specimens, as well as cultures (requires 4-6 wk), may be needed for the

definitive diagnosis; however, empiric therapy should begin immediately.

Chemical peritonitis

Chemical (sterile) peritonitis may be caused by irritants such as bile, blood, barium, or

other substances or by transmural inflammation of visceral organs (eg, Crohn disease) without

bacterial inoculation of the peritoneal cavity. Clinical signs and symptoms are indistinguishable

from those of SP or peritoneal abscess, and the diagnostic and therapeutic approach should be the

same.

Discussion

In the 2005 guidelines for CAPD peritonitis of the International Society for Peritoneal

Dialysis (ISPD) drainage of the peritoneal cavity and antibiotic prophylaxis with ampicilline, an

aminoglycoside with or without metronidazole intravenously prior to colonoscopy is

recommended. However, due to the lack of prospective trials there is scarce evidence to support

this recommendation. Therefore, this guideline is not widely accepted and implemented. In the


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current guidelines of the Dutch Federation of Nephrology (NfN) the use of prophylactic

antibiotics additionally to drainage of the dialysate before colonoscopy is recommended.

However it is mentioned that this is currently not daily practice in the Netherlands. Furthermore,

these nephrology guidelines are widely unknown among gastroenterologists who are responsible

for the planning and performance of endoscopic procedures. In the current guidelines of the

American Society for Gastrointestinal Endoscopy (ASGE), the British Society of

Gastroenterology (BSG)6 and the European Society of Gastrointestinal Endoscopy (ESGE),7 the

risk of peritonitis in PD patients is not mentioned. No advice is given about antibiotic

prophylaxis in these patients prior to colonoscopy.

In 2009, two colonoscopies in 32 CAPD patients were performed in our hospital with one

episode of peritonitis. Although peritonitis after colonoscopy in CAPD patients might be a rare

event, it may lead to serious complications in the short and long term and even to death.

Recurrent peritonitis remains the primary reason to switch from PD to haemodialysis. In

distinction, the prophylactic use of a single-dose antibiotic prior to colonoscopy has almost

no risks.

The implementation of the ISPD guidelines should be considered in every endoscopy unit

performing colonoscopies in CAPD patients. We strongly recommend the use of antibiotic

prophylaxis next to drainage of the peritoneal cavity prior to colonoscopy in CAPD patients as

advised in the ISPD guidelines. A clear, interdisciplinary communication over these patients

between gastroenterologist and nephrologist is important to prevent this serious complication.


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Conclus ion

CAPD peritonitis after colonoscopy is not a rare event. It may lead to serious morbidity.

With our cases we have demonstrated that drainage of the peritoneal cavity prior to endoscopy is

not sufficient to prevent infectious complications. We therefore recommend implementing the

current ISPD guidelines to use additional antibiotics. The gastroenterologist should be familiar

with this guideline.


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References

1. Piraino B, et al. Peritoneal dialysis-related infections recommendation: 2005 update. Perit Dial

Int. 2005;25(2):107-31.

2. Yip T, Tse KC, Lam MF, Cheng SW, Lui SL, Tang S, et al. Risks and outcomes of peritonitis

after flexible colonoscopy in CAPD patients. Perit Dial Int. 2007;27(5):560-4.

3. Brulez HF, Verbrugh HA. First-line defense mechanisms in the peritoneal cavity during

peritoneal dialysis. Perit Dial Int. 1995;15(7 Suppl):S24-33.


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4. Richtlijnen Peritoneale Dialyse gerelateerde infectie. Nederlandse Federatie voor Nefrologie

2007. http://www.nefro.nl/uploads/6y/mb/6ymb3ASlqwnBj7rGmYMtNw/Richtlijn-PD-

gerelateerde-infecties.2007.pdf

5. Antibiotic prophylaxis for GI endoscopy. ASGE guidelines. Gastrointest Endosc.

2008;67:791-8.

6. Allison MC, Sandoe JAT, Tighe R, Simpson IA, Hall RJ, Elliot TSJ. Antibiotic prophylaxis in

gastrointestinal endoscopy. Gut. 2009;58: 869-80.

7. European Society for Gastrointestinal Endoscopy. Guideline: Antibiotic prophylaxis for

gastrointestinal endoscopy 1998. http://www.esge.com/

assets/downloads/pdfs/guidelines/antibiotic_prolax.pdf.

8. Perez Fontan M, et al. Peritonitis-related mortality in patients undergoing chronic peritoneal

dialysis. Perit Dial Int. 2005;25(3):274-84.

9. Voinescu CG, Khanna R. Peritonitis in peritoneal dialysis. Int J Artif Organs.

2002;25(4):249-60.
http://www.nefro.nl/uploads/6y/mb/http://www.nefro.nl/uploads/6y/mb/http://www.esge.com/http://www.nefro.nl/uploads/6y/mb/http://www.esge.com/

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