Background & Methods: The aim of the study is to assess the severity of acute pancreatitis using RANSON’S and APACHE II scoring system among patient with acute pancreatitis. All acute pancreatitis patients of either gender between 16 to 70 years of age, reporting to emergency department of Gadag Institute of Medical Sciences, Gadag was be included under the study. Results: APACHE II score of greater than or equal to 9 predicted 87.8% of severe attacks and 98.55% of mild attacks with a PPV of 97.30 and NPV of 93.15 and accuracy of 94.5. APACHE II score of greater than or equal to 8 predicted more number of severe attacks (97.56%) but less number of mild attacks (85.51%) with PPV of 80.0 and NPV of 98.33. Conclusion: The Ranson’s scoring system proved to be as powerful a prognostic model as the more complicated APACHE II scoring system even in the present era of advanced investigations. The study included 110 patients with acute pancreatitis, peak incidence was in the fourth decade with alcohol accounting for maximum attacks. An APACHE II score of ≥ 10 on admission predicted a complicated outcome in patients with acute pancreatitis with a sensitivity of 100%, specificity of 80%, the positive predictive value of 62% and negative predictive value of 100%. Scores below 10 predicted an uncomplicated outcome.
with varying involvement other regional tissues or remote organ systems. About 80%of attacks are mild, 20% are severe and they are commonly accompanied by necrosis of the pancreas or organ failure. Gallstones and chronic ethanol abuse account for 70% of cases of acute pancreatitis. Pathologically there are two types of pancreatitis- interstitial and necrotizing [1].
Assessment of severity of acute pancreatitis is important for early identification of patients who may benefit from additional supportive and specific therapeutic procedures. Pancreas is a retroperitoneal organ and it lies behind the stomach, transversecolon and the mesocolon. It extends from the medial head of the duodenal Cloop to the hilum of spleen, lies anterior to the inferior venacava, aorta, and splenicveinand leftadrenalgland [2].
The whole organ measures over 15cm long weighs about 90 to 120g in adult, soft in consistency with lobulated surface (hence called as lady of abdomen). It occupies the supracolic and partly the in fracolic compartment[3-4].
The duct of Wirsung is the major duct comes from the tail to the head, arisesfrom the confluence of numerous small ducts of the lobules crossing the gland for minga “Herringbone” pattern, gradually increasing in diameter up to 10mm which joins with the common bile duct in adilatation called “AMPULLAOFVATER” which in turn opens into the duo denalpapilla [5].
The duct of Santorini drains the uncinated process and lower part of the head of pancreas lies more on ventral plane, opens into the duodenum 2 cmproximal to the major papilla and 7 cm distal to the pylorus. Injury to the duct of Santorini in the pancreatic divisum during gastrectomy results in severe hemorrhagic or recurrent pancreatitis [6-7].
Study Design: Observational Study.
A total of 110 Patients admitted in department of General Surgery, Gadag Institute of Medical Science, Gadag during the period of 01 Year was be taken for study considering the inclusion and exclusion criteria.
Inclusion Criteria
Patients with confirmed diagnosis of acute pancreatitis based on clinical suspicion and elevated serum amylase in the age group of 16 to 70 years.
Exclusion Criteria
Methods of Statistical Analysis
The data was be entered in excel format analyzed using the statistical software SPSS 22 version and then the results was be calculated using the descriptive statistics like mean, standard deviation, chi square test to be used for association between factors and P- value, Spearman rank correlation analysis used for each pair of scoring systems.
Table no: 1 Age distribution of study population
|
Age groups |
No of patients |
% Of patients |
|
21-30yrs |
25 |
22.73 |
|
31-40yrs |
32 |
29.09 |
|
41-50yrs |
36 |
32.73 |
|
51-61yrs |
17 |
15.45 |
|
Total |
110 |
100.00 |
|
Mean age |
40.07 |
|
|
SD age |
9.92 |
|
Table 2: Complications wise distribution of patients
|
Complications |
No of patients |
% Of patients |
|
Hemorrhagic Pancreatitis |
6 |
5.45 |
|
Pancreatic Necrosis |
17 |
15.45 |
|
Pseudocyst |
18 |
16.36 |
Of the local complications, 18 patients (16.36%) developed Pseudo Cyst, 17patients (15.45%) developed pancreatic necrosis, and 6 patients (5.45%) developed hemorrhagicpancreatitis.
Surgicalinterventionswereperformedin5patients.
Table 3: Prediction of severity of Ranson’s scores
|
Ranson’s scores |
Sensitivity |
Specificity |
PPV |
NPV |
Correctly classified |
Accuracy |
|
>=2 |
100.00 |
1.45 |
37.61 |
100.00 |
38.18 |
38.18 |
|
>=3 |
100.00 |
37.68 |
48.81 |
100.00 |
60.91 |
60.91 |
|
>=4 |
90.24 |
95.65 |
92.50 |
94.29 |
93.64 |
93.64 |
|
>=5 |
63.41 |
100.00 |
100.00 |
82.14 |
86.36 |
86.36 |
Ranson’s score of greater than or equal to 3 predicted a greater number of severe attacks (100%) but a smaller number of mild attacks (37.68%) with PPV of 48.81 and NPVof100andaccuracyof60.91.
Ranson’s score of greater than or equal to 5 predicted less number of severe attack (63.41%) and branded more severe attacks as mild attacks. Ranson’s score of greater than or equal to 4 had the best sensitivity, specificity and accuracy.
Table 4: Prediction of severity of Apache II scores
|
Apache II scores |
Sensitivity |
Specificity |
PPV |
NPV |
Correctly classified |
Accuracy |
|
>=3 |
100.00 |
2.90 |
37.96 |
100.00 |
39.09 |
39.09 |
|
>=4 |
100.00 |
4.35 |
38.32 |
100.00 |
40.00 |
40.00 |
|
>=5 |
97.56 |
26.09 |
43.96 |
94.74 |
52.73 |
52.73 |
|
>=6 |
97.56 |
42.03 |
50.00 |
96.67 |
62.73 |
62.73 |
|
>=7 |
97.56 |
75.36 |
70.18 |
98.11 |
83.64 |
83.64 |
|
>=8 |
97.56 |
85.51 |
80.00 |
98.33 |
90.00 |
90.00 |
|
>=9 |
87.80 |
98.55 |
97.30 |
93.15 |
94.55 |
94.55 |
|
>=10 |
78.05 |
100.00 |
100.00 |
88.46 |
91.82 |
91.82 |
|
>=11 |
63.41 |
100.00 |
100.00 |
82.14 |
86.36 |
86.36 |
|
>=12 |
48.78 |
100.00 |
100.00 |
76.67 |
80.91 |
80.91 |
|
>=13 |
39.02 |
100.00 |
100.00 |
73.40 |
77.27 |
77.27 |
|
>=14 |
34.15 |
100.00 |
100.00 |
71.88 |
75.45 |
75.45 |
APACHE II score of greater than or equal to 9 predicted 87.8% of severe attacks and 98.55% of mild attacks with a PPV of 97.30 and NPV of 93.15 and accuracy of 94.55
APACHE II score of greater than or equal to 8 predicted more number of severe attacks (97.56%) but less number of mild attacks (85.51%) with PPV of 80.0 and NPV of 98.33.
Table 5: Prediction of severity of Ranson’s and Apache II scores
|
Ranson’s scores |
Sensitivity |
Specificity |
PPV |
NPV |
Correctly classified |
Accuracy |
|
Ranson’s scores |
90.24 |
95.65 |
92.50 |
94.29 |
93.64 |
93.64 |
|
Apache II scores |
87.80 |
98.55 |
97.30 |
93.15 |
94.55 |
94.55 |
As Sensitivity, Specificity, Positive Predictive Value, Negative Predictive Value and Accuracy are nearly found to be same for Ranson’s and APACHE II scores, Ranson’s scoring system is equally efficacious as APACHE II scoring system in the prognostication of acute pancreatitis.
Acute Pancreatitis is an increasing common abdominal emergency. Assessment of severity of acute pancreatitis is important for early identification of patients who may benefit from additional supportive and specific therapeutic procedures[8-9]. Many different scoring systems have been devised for the assessment of severity of acute pancreatitis, which are divided into two types: The first type attempts to correlate laboratory and clinical markers specific to pancreatitis with subsequent outcome and disease severity, the most widely used in this group is Ranson’s Score. The second type of scoring system is the application of non-specific physiological scoring system, which was originally created for use in general population of critically ill patients like APACHEII scores[10].
Ideal predicting criteria should be simple, non-invasive, accurate and quantitative; and the assessment tests should be readily available at the time of diagnosis. The results of the studies were: I) Two early risk factors for death were identified: increasing age and hypotension at admission. Deaths were to a high extent related to multiple organ dysfunction[11-12]. Early recurrence after biliary acute pancreatitis was common. II) A model for early prediction of severity in acute pancreatitis with artificial neural networks was developed, identifying risk factors. Severe acute pancreatitis usually declares itself shortly after the onset of symptoms and delayed progression from mild to severe disease is uncommon. Assessment of the severity of acute pancreatitis is important for early identification of patients who may benefit from additional supportive and specific therapeutic procedures[13]. It is also important to standardize clinical data for comparison of results between centers. Ideal predicting criteria should, therefore, be simple, non-invasive, accurate and quantitative, and the assessment tests should be readily available at the time of diagnosis. Amongst the multifactorial scoring systems, Ranson system is classical through the Apache II system appears to provide the best accuracy[14].
The Ranson’s scoring system accurately predicts the outcome in patients with acute pancreatitis and compares favorably with the physiological scoring systems in the prediction of disease severity for acute pancreatitis, the only disadvantage being a 24-hour delay.
The Ranson’s scoring system proved to be as powerful a prognostic model as the more complicated APACHE II scoring system even in the present era of advanced investigations. The study included 110 patients with acute pancreatitis, peak incidence was in the fourth decade with alcohol accounting for maximum attacks.
An APACHE II score of ≥ 10 on admission predicted a complicated outcome in patients with acute pancreatitis with a sensitivity of 100%, specificity of 80%, the positive predictive value of 62% and negative predictive value of 100%. Scores below 10 predicted an uncomplicated outcome.