thakar_arf_cardiac_surgery: Acute Renal Failure after Cardiac Surgery (Thakar Score)

In cliot: Clinical Indices and Outcomes Tools

Acute Renal Failure after Cardiac Surgery (Thakar Score)

Description

Calculates the Thakar Score to predict the risk of Acute Renal Failure (ARF) requiring dialysis after open heart surgery. This scoring system uses preoperative variables to stratify patients into risk groups (Low, Moderate, High, Very High).

Usage

thakar_arf_cardiac_surgery(gender, chf, lvef_lt_35, preop_iabp, copd,
                           insulin_dependent_dm, prev_cardiac_surgery,
                           emergency_surgery, surgery_type, creatinine_mg_dl)

Arguments

gender	String. Patient gender ("Male" or "Female"). (Female +1 point).
chf	Numeric (0 or 1). Congestive Heart Failure. (1 = Yes, +1 point).
lvef_lt_35	Numeric (0 or 1). Left Ventricular Ejection Fraction < 35%. (1 = Yes, +1 point).
preop_iabp	Numeric (0 or 1). Preoperative Intra-Aortic Balloon Pump use. (1 = Yes, +2 points).
copd	Numeric (0 or 1). Chronic Obstructive Pulmonary Disease. (1 = Yes, +1 point).
insulin_dependent_dm	Numeric (0 or 1). Insulin-requiring Diabetes Mellitus. (1 = Yes, +1 point).
prev_cardiac_surgery	Numeric (0 or 1). History of previous cardiac surgery. (1 = Yes, +1 point).
emergency_surgery	Numeric (0 or 1). Surgery is emergent (required before next working day). (1 = Yes, +2 points).
surgery_type	String. Type of surgery. "cabg": CABG only (0 points). "valve": Valve only (+1 point). "cabg+valve": CABG + Valve (+2 points). "other": Other cardiac surgery (+2 points).
creatinine_mg_dl	Numeric. Preoperative serum creatinine in mg/dL. < 1.2: 0 points. 1.2 - 2.0: +2 points. >= 2.1: +5 points.

Value

A list containing:

Thakar_Score	The calculated score (Range 0-17).
Risk_Group	Risk classification group.
Est_Risk_Dialysis_Requirement	Predicted probability of requiring dialysis.

References

Thakar CV, Arrigain S, Worley S, Yared JP, Paganini EP. A clinical score to predict acute renal failure after cardiac surgery. J Am Soc Nephrol. 2005;16(1):162-168. doi:10.1681/ASN.2004040331

Examples

# Example 1: High Risk
# Female, Diabetic (Insulin), Cr 1.5, CABG+Valve
# Score = 1 (F) + 1 (DM) + 2 (Cr) + 2 (Surg) = 6 -> High Risk (7.0%)
thakar_arf_cardiac_surgery("female", 0, 0, 0, 0, 1, 0, 0, "cabg+valve", 1.5)

# Example 2: Low Risk
# Male, No comorbidities, Cr 0.9, CABG only
# Score = 0 -> Low Risk (0.4%)
thakar_arf_cardiac_surgery("male", 0, 0, 0, 0, 0, 0, 0, "cabg", 0.9)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.