Predictive Model to Calculate the Risk of RBC Transfusion in Elective Brain Tumours Resections (TScoreBTR)

University of Navarra

Status

Completed

Conditions

Surgery

Transfusion

Brain Tumor Adult

Treatments

Other: Red cell concentrate transfusion

Study type

Observational

Funder types

Other

Identifiers

NCT05832450

TScoreBTR

Details and patient eligibility

About

To validate a predictive model for the risk of receiving RBCs in this population. This model uses four preoperative values (haemoglobin levels, tumour volume, previous craniotomy in the same spot, and number of craniotomies foreseen). The investigators would like to create an online data collection tool and calculator.

Full description

Observational study collecting data from different institutions and teams groups in Spain. The investigators aim at validating one model (published in Journal of Neurosurgical Anesthesiology) in different settings and populations to see if it can be accurately used to provide an opportunity to optimize both the patient and the surgical plan as well as to guide perioperative crossmatch and RBC orders.

Inclusion criteria - Brain tumour (primary or metastatic) patients undergoing craniotomy for resection.

Exclusion criteria Patients younger than 18 years old. Urgent/emergent surgery. Brain tumours not requiring full craniotomy. Patients with blood conditions causing coagulation abnormalities. Systemic disease associated with significant abnormalities in coagulation times (prothrombin time <60% or activated thromboplastin time > 50 sg).

Outcome The investigators aim at developing objective and simple criteria about the probability of requirements RBCs during a brain tumour resection surgery. This way we could create a simple tool that would help to optimize both the patient and the surgical plan as well as to guide perioperative crossmatch and RBCs orders.

Statistical Analysis

Transfusion requirement predictive probability will be calculated as follows:

〖1/(1+e〗^(-(5.7606 + [-0.7037*(PH in g/dL)+ 0.0103*(BTLTV in mm3)+ 1.0558*(NC)+ 0.6232*(PC)]))) PH: Preoperative haemoglobin; BTLTV: brain tumour lesions total volume; NC: craniotomies number; PC: previous craniotomy. NT=1 if NT>1, or 0; PC=1 if PC at the same site for resection (not only biopsy), or 0. Model discrimination and calibration will be assessed with area under ROC curve, and Hosmer-Lemeshow test with calibration plot, respectively. P<0.05 will indicate statistical significance.

Enrollment

1,434 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Brain tumour (primary or metastatic) patients undergoing craniotomy for resection.

Exclusion criteria

Patients younger than 18 years old.
Urgent/emergent surgery.
Brain tumours not requiring full craniotomy.
Patients with blood conditions causing coagulation abnormalities.
Systemic disease associated with significant abnormalities in coagulation times (prothrombin time <60% or activated thromboplastin time > 50 sg).