GI · LIVE

CholeS elective cholecystectomy duration score

CholeS score

Sum Bharamgoudar 2018 Table 3 points from caller-assigned age, sex, indication, BMI, CBD diameter, gallbladder wall, pre-operative CT, planned intraoperative cholangiogram, previous surgical admissions, and ASA class, and return the numeric total (max 20). Does not classify operative duration or risk bands.

LIVE $0.005 USDC GET /api/calc/choles_score

Markdown: /docs/choles-score.md · Canonical: https://magentlab.com/docs/choles-score

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

When to use

When an agent has already assigned Bharamgoudar 2018 Table 3 inputs before elective laparoscopic cholecystectomy and needs the published 0-20 point total, not an operative booking, Nassar difficulty grade, or Tokyo cholecystitis/cholangitis grade.

When not to use

Not a medical device. This is a published arithmetic total, not an operative booking, cancellation, or theatre-time allocation.
magent does not image the gallbladder, measure CBD diameter, or assign ASA class; the caller supplies Table 3 tokens and numbers.
Not Nassar operative difficulty. This tool does not grade difficulty or conversion risk.
Not Tokyo Guidelines cholecystitis or cholangitis severity. Related Tokyo tools are separate.
Bharamgoudar 2018 reports cohort percentages lasting >90 min at score 0-3 vs >8; magent returns score and max_score only and does not classify the patient as low or high duration.

Formula

CholeS = age (<40 0, >=40 1.5) + sex (female 0, male 1) + indication (pancreatitis 0, colic_dyskinesia_polyp 0.5, cbd_stone 2, acalculous_cholecystitis 2.5) + bmi_kg_m2 (<25 0, 25-35 inclusive 1, >35 2) + cbd_diameter (normal 0, dilated 2) + gallbladder_wall (normal 0, thick 1.5) + pre_operative_ct (true 1.5) + planned_intraop_cholangiogram (true 3) + previous_surgical_admissions (0 0, 1-2 1, >2 2.5) + asa_class (1 0, 2 1, 3-5 2.5); Bharamgoudar 2018 Table 3; max 20; numeric total only, no duration or risk bands

Citation

Title: The development and validation of a scoring tool to predict the operative duration of elective laparoscopic cholecystectomy
Authors: Bharamgoudar R, Sonsale A, Hodson J, Griffiths E; CholeS Study Group, West Midlands Research Collaborative
Source: Surg Endosc. 2018;32(7):3149-3157
DOI: 10.1007/s00464-018-6030-6

Worked example

All Table 3 zeros (age 35 female pancreatitis BMI 24)

Given: age=35asa_class=1bmi_kg_m2=24cbd_diameter=normalgallbladder_wall=normalindication=pancreatitisplanned_intraop_cholangiogram=falsepre_operative_ct=falseprevious_surgical_admissions=0sex=female

Age 35 → 0; female → 0; pancreatitis → 0; BMI 24 → 0
CBD normal → 0; wall normal → 0; CT false → 0; IOC false → 0; admissions 0 → 0; ASA 1 → 0
Score = 0 (max 20). No duration band.

All Table 3 maxima (score 20)

Given: age=40asa_class=3bmi_kg_m2=36cbd_diameter=dilatedgallbladder_wall=thickindication=acalculous_cholecystitisplanned_intraop_cholangiogram=truepre_operative_ct=trueprevious_surgical_admissions=3sex=male

Age 40 → 1.5; male → 1; acalculous_cholecystitis → 2.5; BMI 36 → 2
CBD dilated → 2; wall thick → 1.5; CT true → 1.5; IOC true → 3; admissions 3 → 2.5; ASA 3 → 2.5
Score = 20 (max 20). No duration band.

Also searched as

CholeS score
laparoscopic cholecystectomy duration
Bharamgoudar 2018
CholeS Study Group score
elective cholecystectomy duration score
gallbladder surgery duration points
CholeS Table 3
LC duration score
intraoperative cholangiogram score

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/choles_score?age=35&sex=female&indication=pancreatitis&bmi_kg_m2=24&cbd_diameter=normal&gallbladder_wall=normal&pre_operative_ct=false&planned_intraop_cholangiogram=false&previous_surgical_admissions=0&asa_class=1

Full URL: https://api.magentlab.com/api/calc/choles_score?age=35&sex=female&indication=pancreatitis&bmi_kg_m2=24&cbd_diameter=normal&gallbladder_wall=normal&pre_operative_ct=false&planned_intraop_cholangiogram=false&previous_surgical_admissions=0&asa_class=1

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/choles_score?age=35&sex=female&indication=pancreatitis&bmi_kg_m2=24&cbd_diameter=normal&gallbladder_wall=normal&pre_operative_ct=false&planned_intraop_cholangiogram=false&previous_surgical_admissions=0&asa_class=1"

Parameters

Name	Type	Required	Description
`age`	integer	required	Age in years (integer 18-120). Bharamgoudar 2018 Table 3: <40 scores 0; ≥40 scores 1.5. Age 39 scores 0; 40 scores 1.5.
`sex`	string	required · female, male	female or male. Female scores 0; male scores 1 (Bharamgoudar 2018 Table 3).
`indication`	string	required · pancreatitis, colic_dyskinesia_polyp, cbd_stone, acalculous_cholecystitis	Caller-assigned indication for elective laparoscopic cholecystectomy (Bharamgoudar 2018 Table 3). pancreatitis scores 0. colic_dyskinesia_polyp (biliary colic, biliary dyskinesia, or gallbladder polyp) scores 0.5. cbd_stone scores 2. acalculous_cholecystitis scores 2.5. magent does not diagnose the indication.
`bmi_kg_m2`	number	required	Body-mass index in kg/m^2 (10-80). Caller-supplied; magent does not compute BMI from height and weight. Bharamgoudar 2018 Table 3: <25 scores 0; 25-35 inclusive scores 1; >35 scores 2. 25.0 and 35.0 score 1; 36 scores 2.
`cbd_diameter`	string	required · normal, dilated	Caller-assigned common bile duct diameter (Bharamgoudar 2018 Table 3). normal scores 0; dilated scores 2. magent does not image the gallbladder or measure the CBD.
`gallbladder_wall`	string	required · normal, thick	Caller-assigned gallbladder wall (Bharamgoudar 2018 Table 3). normal scores 0; thick scores 1.5. magent does not image the gallbladder.
`pre_operative_ct`	boolean	required	Pre-operative CT as assigned by the caller (Bharamgoudar 2018 Table 3). true scores 1.5. magent does not read imaging.
`planned_intraop_cholangiogram`	boolean	required	Planned intraoperative cholangiogram as assigned by the caller (Bharamgoudar 2018 Table 3). true scores 3. magent does not plan the operation.
`previous_surgical_admissions`	integer	required	Previous surgical admissions, integer 0-20 (Bharamgoudar 2018 Table 3). 0 scores 0; 1-2 scores 1; >2 scores 2.5.
`asa_class`	integer	required	ASA physical status class, integer 1-5 (Bharamgoudar 2018 Table 3; Gupta 2011 1-5 range). 1 scores 0; 2 scores 1; 3-5 scores 2.5. magent does not assign ASA class.

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/choles_score Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

1 to 25 items. Each item uses the same keys as the GET query parameters.
POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "age": "35",
      "asa_class": "1",
      "bmi_kg_m2": "24",
      "cbd_diameter": "normal",
      "gallbladder_wall": "normal",
      "indication": "pancreatitis",
      "planned_intraop_cholangiogram": "false",
      "pre_operative_ct": "false",
      "previous_surgical_admissions": "0",
      "sex": "female"
    },
    {
      "age": "35",
      "asa_class": "1",
      "bmi_kg_m2": "24",
      "cbd_diameter": "normal",
      "gallbladder_wall": "normal",
      "indication": "pancreatitis",
      "planned_intraop_cholangiogram": "false",
      "pre_operative_ct": "false",
      "previous_surgical_admissions": "0",
      "sex": "female"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/choles_score",
  "items": [
    {
      "components": [
        {
          "value": 35,
          "factor": "age",
          "points": 0,
          "present": true
        },
        {
          "value": "female",
          "factor": "sex",
          "points": 0,
          "present": true
        },
        {
          "value": "pancreatitis",
          "factor": "indication",
          "points": 0,
          "present": true
        },
        {
          "value": 24.0,
          "factor": "bmi_kg_m2",
          "points": 0,
          "present": true
        },
        {
          "value": "normal",
          "factor": "cbd_diameter",
          "points": 0,
          "present": true
        },
        {
          "value": "normal",
          "factor": "gallbladder_wall",
          "points": 0,
          "present": true
        },
        {
          "factor": "pre_operative_ct",
          "points": 0,
          "present": true
        },
        {
          "factor": "planned_intraop_cholangiogram",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "previous_surgical_admissions",
          "points": 0,
          "present": true
        },
        {
          "value": 1,
          "factor": "asa_class",
          "points": 0,
          "present": true
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "Bharamgoudar R, Sonsale A, Hodson J, Griffiths E; CholeS Study Group, West Midlands Research Collaborative",
        "doi": "10.1007/s00464-018-6030-6",
        "id": "bharamgoudar-2018",
        "pmid": "29340820",
        "source": "Surg Endosc. 2018;32(7):3149-3157",
        "title": "The development and validation of a scoring tool to predict the operative duration of elective laparoscopic cholecystectomy"
      },
      "formula": "choles_score",
      "formula_expression": "CholeS = age (<40 0, >=40 1.5) + sex (female 0, male 1) + indication (pancreatitis 0, colic_dyskinesia_polyp 0.5, cbd_stone 2, acalculous_cholecystitis 2.5) + bmi_kg_m2 (<25 0, 25-35 inclusive 1, >35 2) + cbd_diameter (normal 0, dilated 2) + gallbladder_wall (normal 0, thick 1.5) + pre_operative_ct (true 1.5) + planned_intraop_cholangiogram (true 3) + previous_surgical_admissions (0 0, 1-2 1, >2 2.5) + asa_class (1 0, 2 1, 3-5 2.5); Bharamgoudar 2018 Table 3; max 20; numeric total only, no duration or risk bands",
      "max_score": 20,
      "score": 0,
      "age_years": 35,
      "sex": "female",
      "asa_class": 1,
      "bmi_kg_m2": 24.0,
      "cbd_diameter": "normal",
      "gallbladder_wall": "normal",
      "indication": "pancreatitis",
      "planned_intraop_cholangiogram": false,
      "pre_operative_ct": false,
      "previous_surgical_admissions": 0
    },
    {
      "components": [
        {
          "value": 35,
          "factor": "age",
          "points": 0,
          "present": true
        },
        {
          "value": "female",
          "factor": "sex",
          "points": 0,
          "present": true
        },
        {
          "value": "pancreatitis",
          "factor": "indication",
          "points": 0,
          "present": true
        },
        {
          "value": 24.0,
          "factor": "bmi_kg_m2",
          "points": 0,
          "present": true
        },
        {
          "value": "normal",
          "factor": "cbd_diameter",
          "points": 0,
          "present": true
        },
        {
          "value": "normal",
          "factor": "gallbladder_wall",
          "points": 0,
          "present": true
        },
        {
          "factor": "pre_operative_ct",
          "points": 0,
          "present": true
        },
        {
          "factor": "planned_intraop_cholangiogram",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "previous_surgical_admissions",
          "points": 0,
          "present": true
        },
        {
          "value": 1,
          "factor": "asa_class",
          "points": 0,
          "present": true
        }
      ],
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "citation": {
        "authors": "Bharamgoudar R, Sonsale A, Hodson J, Griffiths E; CholeS Study Group, West Midlands Research Collaborative",
        "doi": "10.1007/s00464-018-6030-6",
        "id": "bharamgoudar-2018",
        "pmid": "29340820",
        "source": "Surg Endosc. 2018;32(7):3149-3157",
        "title": "The development and validation of a scoring tool to predict the operative duration of elective laparoscopic cholecystectomy"
      },
      "formula": "choles_score",
      "formula_expression": "CholeS = age (<40 0, >=40 1.5) + sex (female 0, male 1) + indication (pancreatitis 0, colic_dyskinesia_polyp 0.5, cbd_stone 2, acalculous_cholecystitis 2.5) + bmi_kg_m2 (<25 0, 25-35 inclusive 1, >35 2) + cbd_diameter (normal 0, dilated 2) + gallbladder_wall (normal 0, thick 1.5) + pre_operative_ct (true 1.5) + planned_intraop_cholangiogram (true 3) + previous_surgical_admissions (0 0, 1-2 1, >2 2.5) + asa_class (1 0, 2 1, 3-5 2.5); Bharamgoudar 2018 Table 3; max 20; numeric total only, no duration or risk bands",
      "max_score": 20,
      "score": 0,
      "age_years": 35,
      "sex": "female",
      "asa_class": 1,
      "bmi_kg_m2": 24.0,
      "cbd_diameter": "normal",
      "gallbladder_wall": "normal",
      "indication": "pancreatitis",
      "planned_intraop_cholangiogram": false,
      "pre_operative_ct": false,
      "previous_surgical_admissions": 0
    }
  ]
}

Response

Field	Type	Description
`formula`	string	choles_score
`formula_expression`	string	Exact expression used
`score`	number	Bharamgoudar 2018 Table 3 points 0-20 (half-points allowed; not integer-rounded). Numeric total only; not a duration or risk band.
`max_score`	integer	Always 20
`age_years`	integer	Age used for the exclusive age band
`sex`	string	female or male used for the sex points
`indication`	string	Exclusive indication used (pancreatitis, colic_dyskinesia_polyp, cbd_stone, or acalculous_cholecystitis)
`bmi_kg_m2`	number	BMI in kg/m^2 used for the exclusive BMI band
`cbd_diameter`	string	Caller-assigned CBD diameter used (normal or dilated)
`gallbladder_wall`	string	Caller-assigned gallbladder wall used (normal or thick)
`pre_operative_ct`	boolean	Whether pre-operative CT was assigned true
`planned_intraop_cholangiogram`	boolean	Whether planned intraoperative cholangiogram was assigned true
`previous_surgical_admissions`	integer	Previous surgical admissions used (0-20)
`asa_class`	integer	ASA class used (1-5)
`components`	array	Per-factor Bharamgoudar 2018 Table 3 points
`citation`	object	Bharamgoudar et al. Surg Endosc 2018 citation
`disclaimer`	string	Not-a-device notice

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup.

{
  "components": [
    {
      "value": 35,
      "factor": "age",
      "points": 0,
      "present": true
    },
    {
      "value": "female",
      "factor": "sex",
      "points": 0,
      "present": true
    },
    {
      "value": "pancreatitis",
      "factor": "indication",
      "points": 0,
      "present": true
    },
    {
      "value": 24.0,
      "factor": "bmi_kg_m2",
      "points": 0,
      "present": true
    },
    {
      "value": "normal",
      "factor": "cbd_diameter",
      "points": 0,
      "present": true
    },
    {
      "value": "normal",
      "factor": "gallbladder_wall",
      "points": 0,
      "present": true
    },
    {
      "factor": "pre_operative_ct",
      "points": 0,
      "present": true
    },
    {
      "factor": "planned_intraop_cholangiogram",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "previous_surgical_admissions",
      "points": 0,
      "present": true
    },
    {
      "value": 1,
      "factor": "asa_class",
      "points": 0,
      "present": true
    }
  ],
  "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
  "citation": {
    "authors": "Bharamgoudar R, Sonsale A, Hodson J, Griffiths E; CholeS Study Group, West Midlands Research Collaborative",
    "doi": "10.1007/s00464-018-6030-6",
    "id": "bharamgoudar-2018",
    "pmid": "29340820",
    "source": "Surg Endosc. 2018;32(7):3149-3157",
    "title": "The development and validation of a scoring tool to predict the operative duration of elective laparoscopic cholecystectomy"
  },
  "formula": "choles_score",
  "formula_expression": "CholeS = age (<40 0, >=40 1.5) + sex (female 0, male 1) + indication (pancreatitis 0, colic_dyskinesia_polyp 0.5, cbd_stone 2, acalculous_cholecystitis 2.5) + bmi_kg_m2 (<25 0, 25-35 inclusive 1, >35 2) + cbd_diameter (normal 0, dilated 2) + gallbladder_wall (normal 0, thick 1.5) + pre_operative_ct (true 1.5) + planned_intraop_cholangiogram (true 3) + previous_surgical_admissions (0 0, 1-2 1, >2 2.5) + asa_class (1 0, 2 1, 3-5 2.5); Bharamgoudar 2018 Table 3; max 20; numeric total only, no duration or risk bands",
  "max_score": 20,
  "score": 0,
  "age_years": 35,
  "sex": "female",
  "asa_class": 1,
  "bmi_kg_m2": 24.0,
  "cbd_diameter": "normal",
  "gallbladder_wall": "normal",
  "indication": "pancreatitis",
  "planned_intraop_cholangiogram": false,
  "pre_operative_ct": false,
  "previous_surgical_admissions": 0
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP	Code	When
400	`invalid_age`	age must be an integer from 18 to 120 Returned before settlement; you are not charged.
400	`invalid_sex`	sex must be female or male Returned before settlement; you are not charged.
400	`invalid_bmi_kg_m2`	bmi_kg_m2 must be a number from 10 to 80. Returned before settlement; you are not charged.
400	`invalid_asa_class`	asa_class must be an integer from 1 to 5 (Gupta 2011 ASA physical status). Returned before settlement; you are not charged.
400	`invalid_flag`	boolean clinical flags must be true or false Returned before settlement; you are not charged.
400	`invalid_choles`	indication must be pancreatitis, colic_dyskinesia_polyp, cbd_stone, or acalculous_cholecystitis; cbd_diameter normal or dilated; gallbladder_wall normal or thick; previous_surgical_admissions an integer 0-20 (Bharamgoudar 2018 CholeS Table 3). Returned before settlement; you are not charged.
400	`invalid_items`	POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400	`invalid_item_count`	items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400	`invalid_item`	each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

Tokyo cholangitis — Apply Kiriyama 2018 Tokyo Guidelines 2018 diagnostic criteria and severity grading of acute cholangitis (unchanged from TG13) and return diagnosis (definite, suspected, or none) and severity (grade_i, grade_ii, grade_iii, or none) from caller-assigned flags and age.
Tokyo cholecystitis — Apply Yokoe 2018 Tokyo Guidelines 2018 diagnostic criteria and severity grading of acute cholecystitis (unchanged from TG13) and return diagnosis (definite, suspected, or none) and severity (grade_i, grade_ii, grade_iii, or none) from caller-assigned flags.

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
Execution is timeout-bounded and concurrency-capped.
Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.