APULSI
What is APULSI?
The Automatic Pressure ULcer Severity Index (APULSI) is a state-of-the-art scoring system for the severity assessment of pressure ulcers.
How to take pictures
Ensuring the capture of high-quality photos is paramount to achieving optimal algorithm performance. A comprehensive guide featuring essential tips for image acquisition is available to assist in this endeavor. This section is exclusively dedicated to detailing the photo capture process, with the singular objective of attaining the finest outcomes in ASALT computation.
How does APULSI work?
APULSI utilizes cutting-edge convolutional neural networks that have been trained on a vast dataset comprising thousands of images meticulously annotated by numerous experts. The algorithm quantifies the extent and intensity of erythema and combined them with symptoms. We are currently working a new version that assesses multiple visual signs.
Request APULSI score
{
"requestId": "90925097-820b-403d-a75d-4cd989903df1",
"data": {
"type": "image",
"modality": "clinical",
"operator": "Practitioner",
"bodySite": "LOWER_LEG_LEFT",
"knownConditionForThisImage": {
"conclusion": "Pressure ulcer"
},
"subject": {
"identifier": "6ec724a0-6fa3-11eb-a15f-0242ac160004",
"gender": "F",
"height": 158,
"weight": 49,
"birthdate": "1994-04-10",
"generalPractitioner": {
"identifier": "44f89a8c-6f8a-11eb-9c8a-0242ac160004"
},
"managingOrganization": {
"identifier": "b13cd636-327b-11ec-86b0-0242ac180004",
"display": "Hospital Central"
}
},
"scoringSystems": ["APULSI", "DLQI"],
"questionnaireResponse": {
"APULSI": {
"odor_apusa": 1,
"pain_apusa": 0,
"erythema_surface": 2
},
"DLQI": {
"question1": 2,
"question2": 3,
"question3": 1,
"question4": 2,
"question5": 1,
"question6": 2,
"question7": 2,
"question8": 2,
"question9": 3,
"question10": 2
}
},
"content": "base64 image"
}
}
Questionnaire for scoring system
{
"code": "APULSI",
"questions": [
{
"code": "odor_apusa",
"label": "Odor",
"description": "null",
"answers": [
{ "label": "No", "value": "0" },
{ "label": "Yes", "value": "1" },
],
"openField": false
},
{
"code": "pain_apusa",
"label": "Pain",
"description": "null",
"answers": [
{ "label": "No", "value": "0" },
{ "label": "Yes", "value": "1" },
],
"openField": false
},
{
"code": "erythema_surface",
"label": "Affected area",
"description": "",
"openField": true
}
]
}
The measurement of erythema surface is automated. However, to convert the output into a specific metric unit, a reference marker is required. In the absence of this marker, the alternative is to input the value manually.
Response
"evolution": {
"domains": {
"APULSI": {
"explainabilityMedia": {
"content": "base 64 image",
"detections": null
},
"facets": {
"erythemaIntensity": {
"intensity": 40,
"value": 4
}
},
"grade": {
"category": null,
"score": 3
}
}
}
}
The APULSI does not have a translation into the more clinician-friendly concepts of “mild,” “moderate,” “severe,” or “very severe”, and therefore a null output is given for the category key.