Summative Assessment
Project Number 05
Summative Assessment
Audit Project
Practice List Size: - 5803
Audit Title: Monitoring Renal function in Patients on ACE Inhibitors
Practice List Size: 5803
What is the title of your audit project?
Renal Function Monitoring in Patients on ACE Inhibitors for Cardiac Failure
Why did you choose it?
There is increasing evidence for the benefit of ACE Inhibitors in patients with heart failure, post MI and diabetic hypertensives as well as evidence for benefit in hypertensive patients with chronic renal failure. (1,2,3) ACE Inhibitors are therefore justifiably being increasingly prescribed.
At the same time there is well-appreciated caution in patients with known or suspected renovascular disease and there is evidence of ACE I induced renal failure. (4)
It is clear therefore that renal function should be monitored during treatment with these drugs.
I was not aware of any recall system in place in the practice and was not sure that opportunistically checking these patients U&Es would be adequate.
I chose to look in particular at patients with cardiac failure as this presented a manageable number of patients for initial audit. These patients also have a high incidence of concomitant renal dysfunction.
Which Criterion have you chosen?
Patients who are on an ACE I should have had their renal function checked within the last 12 months.
Why did you choose it?
This criterion was chosen after searching for current guidelines on U&E monitoring and after discussion in the practice as to whether these guidelines were acceptable and workable. Eccles and colleagues (1) recommend that renal function should be checked annually in patients on ACE I in their guidelines published in the BMJ in1998. This sentiment was echoed by Kalra et al in the BMJ in 1999. (5) In an article in Doctor magazine this year John Hampton recommended 6 monthly monitoring of U&E but there is little evidence supporting this. It was therefore agreed that annual monitoring should be carried out.
What standards have you set?
90% of patients on ACE Inhibitors for heart failure should have had their U&E checked within the past 12 months.
Why did you choose these standards?
These standards were chosen after discussion with the partners and a consensus was reached.
What preparation and planning did you undertake?
Preparation involved discussing and explaining the audit to the administrative staff in the practice and drawing up an audit timetable.
The computer database was then searched for patients with a diagnosis of heart failure on any ACE Inhibitor. This was carried out by a member of staff who has a special responsibility for audit.
The notes were then pulled by the reception staff.
Time was set aside to enable me to look through the notes making a note of those who had had their U&E checked in the past 12 months and those who had not.
First Data Collection Date: 16th July 2001
29 patients were found to be on ACE Inhibitors for heart failure. Of these 7 had not had their U&E checked within the past 12 months.
How does this compare to your standard?
22 out of a possible 29 had their U&E checked. That is 76%, which is lower than our target of 90%.
What changes are you implementing?
In the first instance I dictated letters that were typed and sent out by the practice secretary. (Appendix 1) These explained that it is necessary to have regular blood tests taken while on long-term ACE Inhibitor therapy and asked the patients to come to the surgery to get their blood test taken. 3 of the patients were residents of nursing homes and in these cases I wrote a letter to the matron of the nursing home explaining that annual monitoring of U&E is necessary in these patients and asked for their help in doing this.
I also discussed with the practice nurse and practice manager the setting up of an electronic recall system. This would involve a code being entered on the computer when U&E are checked in these patients and a recall prompt being programmed for 52 weeks. This could be linked to the repeat prescription system. This is not done at present but is under development.
Second Data Collection Date: 27th August 2001
The second data collection showed 28 out of the 29 patients on ACE Inhibitors for cardiac failure had had their U&E checked within the last 12 months.
This gives a percentage of 97% which compares favourably both with the standard of 90% and the initial data collection of 76%.
What conclusions have you drawn from this completed audit cycle?
I have drawn the conclusion that the current system of monitoring U&E for patients on an ACE Inhibitor opportunistically can be unreliable. The patients it seems to let down in particular are those in nursing homes who are elderly and therefore more at risk of developing renal failure.
When patients were asked to attend for blood tests and nursing homes were asked to check patients blood this was carried out quite promptly.
I feel a more formal recall system is required and the prompt attendance of patients in my audit indicates that this is likely to be successful.
Further work therefore should include following through the setting up of an electronic recall system and extending this to include all patients in ACE Inhibitors.
This system should then be reaudited in 12-18 months time.
References
1. Eccles, Freemantle, and Mason. Guideline for ACE Inhibitors in Primary Care management of adults with symptomatic heart failure. BMJ 316 1369-1375
2. Hypertension In Older People. SIGN Guideline No.49 January 2001
3. Ramsay, Williams et al. Guidelines for Management of Hypertension: Report of British Hypertension Society. Journal of Human Hypertension 1999 13 569-592
4. Cooke, De Besse. ACE Inhibitor-induced renal dysfunction: recommendations for prevention. International Journal of Clinical Pharmacological Therapy 1994 Feb; 32(2): 65-70
5. Kalra, Kumwend, MacDowal, Roland (1999) Questionnaire study and audit of use of ACE Inhibitors and monitoring in General Practice: the need for guidelines to prevent renal failure. BMJ 318:234-237
Appendix 1
Letter sent asking patients to attend for blood test
Dear Mr Patient
The practice is currently carrying out an audit to ensure that patients on tablets such as X (name of particular ACE Inhibitor) are getting a blood test to check their kidney function at least once a year. This is necessary because in a small number of people these tablets can affect the kidney function. This could go unnoticed if the blood is not tested.
Our records show that it has been more than a year since your last blood test of this kind. I would therefore be grateful if you would phone to make an appointment with the practice nurse to get your blood checked.
Thank you,
Yours sincerely
GP Registrar
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