Clinical Measurements of Postural Blood Pressures (BP) in UHW

Introduction

Postural BP readings are important in assessing older people, but are infrequently measured (1) The National Audit of Inpatient Falls (NAIF) 2022 has shown measurement of lying standing blood pressure (LSBP) remains below 50% (2)  

NICE guidelines suggest checking LSBP in patients with:  

1) Hypertension and postural hypotension symptoms  

2) Hypertension and Type 2 diabetes  

3) Hypertension and age ≥ 80 years (3)  

4) Patients presenting with falls (4).  

We aimed to update local data for LSBP recording and investigate LSBP measurements in hypertensive patients.

Method   

Data was collected across 4 wards in University Hospital of Wales between 22^nd May and 9^th June. Patient notes and NEWS charts were reviewed to establish whether an LSBP was necessary and carried out according to NICE guidelines (2) and whether appropriate reasons were documented.   

Results   

The table below shows the number of patients required and completed LSBPs.  

Total Number of Patients  98  

Number of Patients requiring a LSBP  76 

Total number of postural measurements completed 18 (16 LSBP, 2 sit/stand) 

Number of acceptable reasons for not completing postural BP reading  12 

All categories of patient requiring a LSBP have <40% completion; no LSBP’s were completed in patients that were hypertensive and diabetic.

 Conclusion  

Results indicate that local LSBP measurement requires improvement, with only 24% of requiring patients having a postural reading completed. Significant variations in guidelines (NAIF (2), MFRA (4), Cardiff and Vale Falls Policy (5)) have been highlighted as a potential factor, hence clearer guidance is needed on when LSBP is required, to improve detection of postural hypotension and therefore improve falls prevention and hypertension management.  

 References  

1. Detecting Risk of Postural hypotension. BMJ. 2020  
2. National Audit of Inpatient Falls report 2022.  
3. NICE. Hypertension in adults 2022  
4. NICE. Falls in older people 2013. 
5. CAVUHB. Falls Policy 2021