Related Experiment Video
Updated: Jul 9, 2025

A Retrograde Implantation Approach for Peritoneal Dialysis Catheter Placement in Mice
Published on: July 20, 2022
Predicting transfer to haemodialysis using the peritoneal dialysis surprise question
Ayesha Anwaar1,2, Sai Liu1, Maria Montez-Rath1
1Department of Medicine, Division of Nephrology, Stanford University School of Medicine, Palo Alto, CA, USA.
Clinicians can use a simple "surprise question" to identify patients on peritoneal dialysis (PD) at high risk of transferring to haemodialysis (HD). This tool aids resource allocation and supports better patient care transitions.
Area of Science:
- Nephrology
- Clinical Risk Stratification
- Dialysis Management
Background:
- Patients on peritoneal dialysis (PD) may require transfer to haemodialysis (HD).
- Effective risk stratification tools are needed to manage dialysis resources and patient care.
- Identifying patients at high risk for PD to HD transfer is crucial for timely support.
Purpose of the Study:
- To evaluate a simple point-of-care question for identifying patients at high risk of transfer from PD to HD.
- To assess the utility of the "surprise question" (SQ) in predicting transfer to HD and other adverse outcomes.
Main Methods:
- A prospective observational study of 1275 patients on PD across 35 home dialysis programs.
- Modified the palliative care "surprise question" (SQ): "Would you be surprised if this patient transferred to HD in the next six months?"
- Registered nurses and nephrologists answered the SQ; patient outcomes were followed for 6 months.
Main Results:
- Nurses identified 15% of patients as high risk; 11% transferred to HD compared to 3% of low-risk patients (HR: 3.92).
- Nephrologists identified 17% as high risk; 12% transferred to HD compared to 2% of low-risk patients (HR: 5.56).
- High-risk patients had increased rates of death and hospitalization; peritonitis rates were similar.
Conclusions:
- The Peritoneal Dialysis Surprise Question (PDSQ) is a simple, effective point-of-care tool.
- PDSQ aids in identifying patients at high risk for transfer to HD and other adverse outcomes.
- This tool can help optimize resource allocation and patient management in dialysis centers.
Related Concept Videos
Dialysis
Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
Renal Failure: Dose Adjustments
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
Factors Affecting Renal Clearance: Renal Impairment
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
Filtration and Urine Formation
Heart Failure Drugs: Diuretics
Drug Elimination by Renal Route: Tubular Secretion

