Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Ultrasound features of various brain mass lesions in Mair scale (in grades) |
Assessment of target visibility, echogenicity, homogeneity and border demarcation in sonography and their comparison to preoperative computed tomography and magnetic resonance imaging |
Intraoperatively |
|
Secondary |
Sensitivity of intraoperative sonography to detect mass lesion compared to preoperative magnetic resonance imaging or computed tomography (in percents) |
Sensitivity = true detection of mass lesion / (true detection of mass lesion + inability to detect mass lesion) x 100 |
Intraoperatively |
|
Secondary |
Sensitivity of intraoperative sonography to detect residual mass lesion compared to postoperative magnetic resonance imaging or computed tomography (in percents) |
Sensitivity = true detection of residual mass lesion / (true detection of residual mass lesion + inability to detect residual mass lesion) x 100 |
Within 48 hours after surgery |
|
Secondary |
Specificity of intraoperative sonography to detect residual mass lesions compared to postoperative magnetic resonance imaging or computed tomography (in percents) |
Specificity = true absence of residual mass lesion / (true absence of residual mass lesion + false detection of residual mass lesion) x 100 |
Within 48 hours after surgery |
|
Secondary |
Positive predictive value of intraoperative sonography to detect residual mass lesions compared to postoperative magnetic resonance imaging or computed tomography (in percents) |
Positive predictive value = true detection of residual mass lesion / (true detection of residual mass lesion + false detection of residual mass lesion) x 100 |
Within 48 hours after surgery |
|
Secondary |
Negative predictive value of intraoperative sonography to detect residual mass lesions compared to postoperative magnetic resonance imaging or computed tomography (in percents) |
Negative predictive value = true absence of residual mass lesion / (true absence of residual mass lesion + inability to detect residual mass lesion) x 100 |
Within 48 hours after surgery |
|
Secondary |
Accuracy of intraoperative sonography to detect residual mass lesions compared to postoperative magnetic resonance imaging or computed tomography (in percents) |
Accuracy = (true detection of residual mass lesion + true absence of residual mass lesion) / (true detection of residual mass lesion + true absence of residual mass lesion + false detection of residual mass lesion + inability to detect residual mass lesion) x 100 |
Within 48 hours after surgery |
|
Secondary |
Duration of mass lesion removal (in minutes) |
How long did in take to remove mass lesion from starting of it's dissection till final evacuation |
Intraoperatively |
|
Secondary |
Extent of resection (in percents) |
Extent of resection = (preoperative tumor volume - postoperative tumor volume) / preoperative tumor volume x 100 |
Within 48 hours after surgery |
|
Secondary |
Differentiation between artefacts and residual lesion (Yes or No) |
Possibility of ultrasound differentiation between artefacts and residual lesion |
Intraoperatively |
|
Secondary |
Duration of approach to mass lesion using ultrasound-guided needle or ultrasound wire-guided port (in minutes) |
Only for subcortical or deep-seated mass lesions. How long did in take to reach margin of mass lesion after dural incision using ultrasound-guided needle or ultrasound wire-guided port |
Intraoperatively |
|
Secondary |
Karnofsky performance status (in percents) |
Assessment of patients' possibilities to self-service in Karnofsky Performance Status scale |
Within 10 days after surgery |
|
Secondary |
Cerebral complications |
Which cerebral complications arose after surgery |
From admission to intensive care unit after surgery till hospital discharge, up to 365 days |
|