Screening and diagnosis

Classification and risk stratification

Perioperative care

Quality improvement

Patient education

Nonpharmacologic interventions

Therapeutic procedures

Respiratory support

Follow-up and surveillance

Specific circumstances

Preventative measures

Medical management

Surgical interventions

Inpatient care

Diagnostic procedures

Diagnostic investigations

Insufficient evidence to make a recommendation.

Strongly favor this test or intervention.

The SFU grading system for postnatal hydronephrosis uses user responses regarding pelvicaliectasis and renal parenchymal atrophy to determine the severity of hydronephrosis, grading it from 0 to 4. The gradations indicate the level of severity, with higher grades reflecting more severe hydronephrosis.

The calculator works as follows: 

- Inputs:
  - "Pelvicaliectasis" with options representing the degree of renal pelvis and calyceal dilation:
    - "No dilatation, intact central renal complex"
    - "Renal pelvis dilation without calyceal dilation, splitting of renal pelvis only"
    - "Renal pelvis dilation with dilation of >= 1 major calyces"
    - "Renal pelvis dilation with dilation of all 3 major calyces and/or minor calyces"
  - "Renal parenchymal atrophy" with options indicating the presence or absence of atrophy:
    - "Absent"
    - "Present"
    
- Outputs: 
  - The result of the SFU grading:
    - "Grade 0: No hydronephrosis" if there is no dilatation and renal parenchymal atrophy is absent.
    - "Grade 1: Mild hydronephrosis" if there is renal pelvis dilation without calyceal dilation and atrophy is absent.
    - "Grade 2: Mild hydronephrosis" if there is renal pelvis dilation with dilation of one or more major calyces and atrophy is absent.
    - "Grade 3: Moderate hydronephrosis" if there is renal pelvis dilation with dilation of all major calyces and/or minor calyces, with atrophy absent.
    - "Grade 4: Severe hydronephrosis" if there is renal pelvis dilation with dilation of all major calyces and minor calyces, with atrophy present.
    - "Stage cannot be fully assessed" for any other combination or invalid input scenarios.

The Society for Fetal Urology (SFU) grading of postnatal hydronephrosis is a clinical calculator used in the field of pediatric urology. This grading system is specifically designed for assessing the severity of hydronephrosis, a condition characterized by the swelling of a kidney due to a build-up of urine, in newborns and infants. The SFU grading system is a valuable tool for clinicians as it helps in the diagnosis, monitoring, and management of postnatal hydronephrosis. It provides a standardized method to grade the severity of hydronephrosis, which can guide treatment decisions and predict prognosis. The grading system ranges from SFU Grade 0 (no hydronephrosis) to SFU Grade 4 (severe hydronephrosis). There are no specific exclusion criteria for its use, but it is primarily applicable to the pediatric population, particularly newborns and infants.

Congenital hydronephrosis

Guidelines

Key sources