PUBLIC LIBRARY / SCORE

ARISCAT

Estimates postoperative pulmonary complication risk (respiratory infection or failure, bronchospasm, atelectasis, effusion, pneumothorax or aspiration pneumonitis) in surgery under general, neuraxial or regional anaesthesia.

Calculate with transparency

Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.

Preparing the form…

Check the method
Enter the data
Check the result

Method · Limits of application

ARISCAT/Canet 2010, Table 6: 7 weighted factors; duration ≤ 2 h = 0, > 2 h and ≤ 3 h = 16, > 3 h = 23

ARISCAT 2010 was derived and validated in a cohort of 2464 surgical patients at 59 hospitals, under general, neuraxial or regional anesthesia, with postoperative pulmonary complications as the outcome. The minimum age, exclusions and complete weights/ranges are not available in the abstract read; the cohort rates are not an individual estimate recalibrated for another population. The new reading of the original 2010 article found that the Methods describe adults aged at least 18 and study-specific exclusions; Table 6 confirms duration ≤2 h, >2 to ≤3 h and >3 h. The high-risk boundary is ≥45 in Table 7 and >45 in the text; this documentary discrepancy has not been adjudicated here.

Conditions of use

Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.

Documented parameters

Age
Preoperative oxygen saturation (room air, at rest)
Respiratory infection in the last month
Preoperative anemia (Hb ≤ 10 g/dL)
Incision site
Duration of surgery
Emergency surgery

4/4 reference cases checked. Numerical tests are not clinical validation.

Sources and documentation

Documented formula

Transcribed from the source or a recorded revision; this is not a clinical recommendation.

Age 51–80 = 3, > 80 = 16 · SpO₂ 91–95% = 8, ≤ 90% = 24 · respiratory infection in the past month = 17 · Hb ≤ 10 g/dL = 11 · upper abdominal incision = 15, intrathoracic incision = 24 · duration ≤ 2 h = 0, > 2 h and ≤ 3 h = 16, > 3 h = 23 · emergency surgery = 8.

References

Canet J et al. Prediction of postoperative pulmonary complications in a population-based surgical cohort. Anesthesiology, 2010.

Identifier: ariscat

Original clinical content: Brazilian Portuguese.

Method version

ARISCAT/Canet 2010, Table 6: 7 weighted factors; duration ≤ 2 h = 0, > 2 h and ≤ 3 h = 16, > 3 h = 23

ariscat@native-2026-10-04+42ea541ad713

Source for the active edition

The bibliographic edition identifies the source. By itself, it proves neither full conformity of the formula nor clinical approval.

Synthetic cases checked (4)

Synthetic cases for checking the implementation, with no patient data.

Case 1

reference-001

Inputs

Age: 51 to 80 years
Preoperative oxygen saturation (room air, at rest): ≥ 96%
Incision site: Peripheral
Duration of surgery: ≤ 2 h
Respiratory infection in the last month: No
Preoperative anemia (Hb ≤ 10 g/dL): No
Emergency surgery: No

{
  "idade": "3",
  "sat": "0",
  "incisao": "0",
  "duracao": "0",
  "infec": false,
  "anemia": false,
  "emerg": false
}

Expected result

{
  "score": 3,
  "level": "low"
}

Actual result

{
  "score": 3
}

Case 2

reference-002

Inputs

Age: 51 to 80 years
Preoperative oxygen saturation (room air, at rest): 91 to 95%
Incision site: Upper abdominal
Duration of surgery: ≤ 2 h
Respiratory infection in the last month: No
Preoperative anemia (Hb ≤ 10 g/dL): No
Emergency surgery: No

{
  "idade": "3",
  "sat": "8",
  "incisao": "15",
  "duracao": "0",
  "infec": false,
  "anemia": false,
  "emerg": false
}

Expected result

{
  "score": 26,
  "level": "mid"
}

Actual result

{
  "score": 26
}

Case 3

reference-003

Inputs

Age: 51 to 80 years
Preoperative oxygen saturation (room air, at rest): ≥ 96%
Incision site: Upper abdominal
Duration of surgery: > 2 h and ≤ 3 h
Respiratory infection in the last month: No
Preoperative anemia (Hb ≤ 10 g/dL): No
Emergency surgery: No

{
  "idade": "3",
  "sat": "0",
  "incisao": "15",
  "duracao": "16",
  "infec": false,
  "anemia": false,
  "emerg": false
}

Expected result

{
  "score": 34,
  "level": "mid"
}

Actual result

{
  "score": 34
}

Case 4

reference-004

Inputs

Age: > 80 years
Preoperative oxygen saturation (room air, at rest): 91 to 95%
Incision site: Upper abdominal
Duration of surgery: > 3 h
Respiratory infection in the last month: No
Preoperative anemia (Hb ≤ 10 g/dL): No
Emergency surgery: No

{
  "idade": "16",
  "sat": "8",
  "incisao": "15",
  "duracao": "23",
  "infec": false,
  "anemia": false,
  "emerg": false
}

Expected result

{
  "score": 62,
  "level": "high"
}

Actual result

{
  "score": 62
}

Code and reproducibility

This tool’s code on GitHub

Download code and tests

Sources, version and reproduction instructions

The code tests are technical checks. Clinical approval and professional translation review are recorded separately.

Relationship with cancer research

General context — relationship to be defined

A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.