Effects of Early Stage Mini-invasive Abdominal Drainage on Complications and Prognosis of SAP

This study aims to standardized the process of mini-invasive abdominal draniage of SAP in early stage.To determine the indications and occasion.

Pancreatitis associated ascetic fluids(PAAF) gather with the beginning of SAP and induced IAP(intra-abdominal pressure) increasement.With an excess of 12mmHg ,IAP presents as IAH(intra-abdominal hypertension) and when a ≥20mmHg IAP accompanied with at least one organ's dysfunction it is ACS(abdominal compartment syndrome).Previous recommended theraphy of ACS is laparotomy.However,with inherited advantages such as ease-to-operate and minimal invassiveness, early stage mini-invasive abdominal drainage therapies , for example, percutaneous catheter drainage(PCD) instructed by ultrasound or CT ,have shown a promised future in recent years. It is reported that patients acquired PCD decreased 81% in operation rate compared to those who did not and had lower mortality rate. Whereas, the operation flow of early stage mini-invasive abdominal drainage remains controversial, and whose validity calls for evidence from large-scale clinical trials.

SAP patients who matches one of the following criteria:1．Intravesical pressure≥20cmH2O or 2.CT images:acute peripancreatic liquid collection should have early stage abdominal drainage immediately;

Despite that it matches one of the cirteria as the study group:1．Intravesical pressure≥20cmH2O or 2．CT images:acute peripancreatic liquid collection, the patients continue acquire prearranged integrative treatment and will not accept early stage abdominal drainage until any of the followings emerge:1.Intra-abdominal apartment syndrome; 2. Pancreatic pseudocyst;3. Pancreatic or peripancreatic necrosis;

Ultrasound/CT/GUS guided abdominocentesis and drainage with single-chamber deep venous catheters shoule be implemented and the catheter should be removed when abdominal drainage flow≤100ml in two successive days;

Despite that it matches one of the cirteria as the study group:1．Intravesical pressure≥20cmH2O or 2．CT scan:acute peripancreatic liquid collection, the patients continue acquire prearranged integrative treatment and will not accept early stage abdominal drainage until any of the followings emerge:1.Intra-abdominal apartment syndrome; 2. Pancreatic pseudocyst;3. Pancreatic or peripancreatic necrosis;

Time of first attacks of these situations that have to be surgically interfered in 28 days since onsets: ACS or pancreatic necrosis, abdominal hemorrhage, pancreatic abscess or pancreatic pseudocyst which brings symptoms or complications or increase in size;rates of organs' dysfunction, abdominal infection and reuse of drainage;

Rates of mortality or organs' dysfunction; rates of complications, including: pancreatic leakage, pancreatic pseudocysts in need of surgical interfere, pancreatic abscess, bile duct stricture and pancreatic insufficiency; times of surgery, hospital stay, time in ICU and hospitalization expense;

Inclusion Criteria: 1.Diagnosis of pancreatitis 2.Onset of abdominal pain within 72h 3.Moderate severe or severe AP according to Atlanta criteria revisited in 2012 4.Intravesical pressure≥20cmH2O 4.CT images:acute peripancreatic liquid collection - Exclusion Criteria: 1.Pregnancy 2.Heart function: NYHA >II 3.Pacemaker implantation 4.COPD 5.CKD 6.Pre-existing disease with life expectancy < 3 months 7.CT images:No acute peripancreatic liquid collection 8.Intravesical pressure>25cmH2O 9.At least one organ'S newly emerged dysfunction -