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Revista do Colégio Brasileiro de Cirurgiões

Print version ISSN 0100-6991

Rev. Col. Bras. Cir. vol.39 no.5 Rio de Janeiro Sept./Oct. 2012

http://dx.doi.org/10.1590/S0100-69912012000500008 

ORIGINAL ARTICLE

 

Severe acute pancreatitis: results of treatment

 

 

Franz Robert Apodaca-Torrez, TCBC-SPI; Edson José Lobo, ACBC-SPII; Lilah Maria Carvas MonteiroIII; Geraldine Ragot de MeloIII; Alberto Goldenberg, TCBC-SPIV; Benedito Herani Filho, TCBC-SPIV; Tarcisio Triviño, TCBC-SPIV; Gaspar de Jesus Lopes Filho, TCBC-SPV

IAffiliate Professor, Surgical Gastroenterology, Department of Surgery, São Paulo School of Medicine – UNIFESP
IIAssistant Professor; Head, Surgical Gastroenterology, Department of Surgery, São Paulo School of Medicine – UNIFESP
IIIMedical School Graduate, sixth year, São Paulo School of Medicine – UNIFESP
IVAssociate Professor Surgical Gastroenterology, Department of Surgery, São Paulo School of Medicine – UNIFESP
VAffiliate Professor; Full Professor, Surgical Gastroenterology, Department of Surgery, São Paulo School of Medicine – UNIFESP

Address for correspondence

 

 


ABSTRACT

OBJECTIVE: To evaluate the results of the Protocol for treatment of patients with severe acute pancreatitis.
METHODS: We consecutively analyzed age, gender, etiology, length of hospital stay, type of treatment and mortality of 37 patients with severe acute pancreatitis from January 2002.
RESULTS: The patients' ages ranged from 20 to 88 years (average 50 years), 27% were female and 73% male. Mean overall hospital stay was 47 days. Thirteen patients were treated surgically, the average operations per patient was two. There were six deaths among patients undergoing surgical treatment (46%) and two deaths in the group submitted to medical treatment alone (8.3%). The overall mortality was 21%.
CONCLUSION: After modification in the form of management of patients with severe acute pancreatitis, there was a decrease in mortality and a trend for conservative management.

Key words: Pancreatitis. Pancreatitis, acute necrotizing. Therapeutics. General Surgery. Mortality.


 

 

INTRODUCTION

A cute pancreatitis is a disease triggered by abnormal activation of pancreatic enzymes and release of several inflammatory mediators, whose etiology, in approximately 80% of cases, corresponds to biliary lithiasic disease or alcohol ingestion1,2. The diagnosis obeys clinical, laboratory and imaging parameters3. Most often, the disease is self-limiting to the pancreas, with minimal systemic repercussions; this mild form is characterized by good clinical outcome and low mortality rates2. However, in approximately 10% to 20% of the cases, the disease is more intense, with great systemic effects, leading to levels of up to 40% mortality.

After the Atlanta Symposium (1992)5, two clinical well-defined acute pancreatitis became accepted: an interstitial form ("light" or "edematous") and asevere form, also known as necro-hemorrhagic or "necrotizing"panvreatitis, that usually implies some degree of pancreatic or peripancreatic necrosis, or both, with more complications, such as necrosis infection, peripancreatic fluid collections, abscesses, pseudocysts, and even multiple organs failure.

According to the Study Group for the Classification of Pancreatitis, severe acute pancreatitis (SAP) is characterized by having three or more Ranson score criteria, eight or more points in the APACHE II classification, pancreatic complications or the presence of organ failure3. Although less frequent, this severe form of the disease continues to generate a lot of controversy6, especially with regard to the best treatment, becoming thus a challenge for surgeons, physicians, radiologists, endoscopists and intensivists7.

The goal of this series is to present the initial results obtained with the Severe Acute Pancreatitis Care Protocol in the Department of Surgical Gastroenterology and Surgical Emergency Surgery, São Paulo Hospital 5 UNIFESP/EPM.

 

METHODS

We studied 37 patients consecutively admitted to the Emergency Department of General Surgery, São Paulo Hospital (HSP) and followed up at the Department of Surgical Gastroenterology, diagnosed with severe acute pancreatitis, respecting the criteria of the Atlanta classification3, between January 2002 and December 2010. We obtained information from each patient from medical records and analyzed the relationship of mortality with the variables: age, gender, etiology, length of stay and type of treatment.

For the analysis of treatment, patients were divided into two groups. The first group included 13 patients (group 1), 12 of which were submitted to surgical treatment and one to percutaneous drainage of infected pancreatic necrosis guided by imaging method. The indication of surgical and percutaneous drainage was performed after the diagnosis of sepsis in eight patients, and in five by gram stainnig and culture of secretions obtained by fine needle aspiration. In the second group, 24 patients clinically treated according to the protocol were enrolled (group 2).

Statistical analysis was performed using the chi-square, T-Student and Mann-Whitney tests. P-values <0.05 were considered statistically significant.

 

RESULTS

The characteristics of variables analyzed are shown in table 1.

The age of patients included in the study ranged from 20 to 88 years (average 50). There was no statistically significant difference in mortality (p=0.154). Ten patients were female (27%) and 27 (73%) were male. Likewise, there was no statistical significance for this variable with respect to mortality (p=0.312 and p=0.359, respectively). The etiology of acute pancreatitis in the present sample was distributed as follows: in 22 (59.4%) patients, the cause was biliary disease lithiasic; in nine (24.3%), the cause was alcoholic; and in six (16.2%) patients the causal factor could not determined. The etiology of pancreatitis was not associated with mortality (p=0.617). The overall average length of stay was 47 days. For group 1 patients, the length of stay was 76 days (30-240 days), and for patients in group 2 it was 31.3 days (11-88 days). Statistical analysis revealed no significance correlating this variable to mortality (p=0.088). Overall mortality was 21.6% (8/37). Of the total deaths, six occurred in group 1 (46%) and only two patients died in group 2 (8.3%).

The variable "type of treatment" reached the higher statistical significance when the mortality in group 1 was correlated with the mortality in group 2 (p = 0.028).

 

DISCUSSION

In recent decades, several factors, such as the progress of intensive care, imaging methods, minimally invasive procedures, spectrum and pharmacokinetics of antibiotics and, crucially, a better understanding of some pathophysiological aspects of the disease, led to the increasing delay of surgical intervention, with the consequent reduction in mortality rates observed in SAP8.

Moreover, it has been repeatedly discussed how to best characterize and early detect SAP. Laboratory parameters and imaging scores such as APACHE II, Ranson criteria, Glasgow, Goris, among others, have been proposed6. However, there is still no consensus on the best method, with a trend for less sophisticated and more reproducible scores 9, such as Marshal and modified sequential organ failure assessment (SOFA) 9.

Despite the defects in the existing Atlanta classification 6, this remains a reference in the attempt to standardize this characterization. For simplicity, we chose to obey its guidelines in order to characterize SAP.

The epidemiological characteristics of the disease appear to be well defined10, with variability only in the etiologic factor according to the topographical area where it is analyzed. The age and etiology in our sample did not differ from other publications resulting from observed samples11,12 in Brazil. However, it is noteworthy the predominance of male patients, perhaps attributable to the small sample size.

Historically, the management of patients with SAP has prompted discussion and debate about what would be the best therapy 13. Conservative measures, based on exclusively clinical supportive, differed immensely from those proposing early surgical approach and even more aggressive procedures, such as pancreatectomy 14. High mortality rates led to abandon of the last two options mentioned above.

Works such as the one from Mier et al. confirmed that early operation in this patient carried a range of complications and high rates of mortalidade15. This was consolidated by better pathophysiological understanding of the disease, allowing the SAP to be split into two phases, the early, characterized by inflammatory dominance, the and late – from the tenth day of illness on – a phase in which patients can be affected by infectious complications16.

This is precisely one of the reasons why the papers published from the 90's clearly showed a tendency to delayed surgery in patients with this indication17-19. The main concern of this study was to analyze the approach of this type of patient and associate it to clinical outcome.

There are studies that advocate the postponement of surgery, at least until one has made all attempts to compensate clinical situations and there are no mandatory surgical or minimally invasive procedures indications20-22. Clearly, due to the peculiar characteristics of these patients, length of stay is usually prolonged, thus reflecting increasing hospital costs. The length of stay of patients in this series was higher in group 1, undergoing surgical treatment (p <0.01), and although there have been no cost analysis, it is likely to have been significantly higher in this group.

In our study, the indication for surgical treatment followed the Care Protocol, already mentioned, based on the Atlanta criteria23. In this group, mortality rate, considerably higher than in group 2, could be related to severity, a fact demonstrated by longer hospital stays, although stratification was not performed according to severity.

Despite the small number of patients in our sample, we can infer that the standardization of the initial approach and the delayed surgical treatment of SAP constitute the best alternative in order to improve the results of this unique presentation of acute pancreatitis. Minimally invasive methods, such as percutaneous, endoscopic and laparoscopic, are gaining ground, with encouraging results when compared to traditional methods in selected patients24-26.

In conclusion, our study also confirms high rates of mortality in patients with infected SAP undergoing surgical treatment and shows a tendency towards conservative management in this situation.

 

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Address for correspondence:
Franz Robert Apodaca-Torrez
E-mail: apodaca@uol.com.br

Received on 02/05/2012
Accepted for publication 06/07/2012

Conflict of interest: none
Source of Funding: no

 

 

Work done at the Discipline of Surgical Gastroenterology, Department of Surgery São Paulo School of Medicine – UNIFESP, São Paulo – SP, Brazil.

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