16. Mrs Q believes that staff should have drained her husband's acid collection bag and checked on his wellbeing every two to four hours during the night of 29 December. Before this she says his bag was drained every two to four hours.
17. The Trust’s complaint response says the collection bag and NG tube was checked at 7pm on 29 December, when 20ml of fluid was recorded. Staff also completed regular routine observations at 8.21pm and 9.13pm and at 5.57am and 10.30am on 30 December.
18. Staff checked the collection bag again at 11am on 30 December. The Trust says the collection bag contained 470ml of fluid. The Trust accepts the NG tube and collection bag should not have been left unchecked for such a long period of time.
19. Section 5.6 of the NMC Standards say that staff should, ‘insert, manage and remove oral/nasal/gastric tubes’.
20. There is no national guidance to say how often to check a collection bag.
21. In the absence of national guidance, our nursing adviser explains that NG tubes should be checked regularly to make sure there are no complications such as blockage, aspiration (gastric contents entering the lungs) and displacement. They say drainage volume should be measured for fluid balance purposes and to guide when the tube is no longer needed.
22. Typically, NG tubes are monitored at least four hourly and in cases where gastric contents are high, this could be as regular as every 30 minutes to make sure the patient does not choke. The timing of this would be dependent on the volume of aspirate and the patient. Mr Q was a high-risk patient due to his condition and being unable to swallow.
23. There is reference to monitoring of the NG tube in the records, but it is not structured or regular. Section 1.16 of the NMC Standards says staff should demonstrate the ability to keep complete, clear, accurate and timely records. This means the records should clearly show when Mr Q’s NG tube was placed and how often the contents were drained and monitored. From the information in his medical records, we cannot say if staff appropriately monitored and recorded the NG tube and collection bag.
24. We considered the records and see that on 28 December, staff recorded Mr Q’s aspirate at 50ml over a 24-hour period. At 2.50pm on 29 December staff recorded Mr Q’s aspirate volume at 550ml. There is also an entry in the records at 4.18pm on 29 December that drainage from the NG tube was 500ml in the last 24 hours. This does not match with what the Trust said in its complaint response. Despite the significant increase and high volume of aspirate documented on 29 December, there is no evidence of any extra checks of the NG tube until 10.30am on 30 December where records show a nurse was going to check the NG. Mr Q had been vomiting and there was 200ml in the collection bag. Further examination from staff found the NG tube had become displaced and was not draining. They reinserted it and another 470ml of aspirate was immediately drained.
25. As Mr Q’s NG tube was not checked for over 20 hours, staff did not act in line with section 5.6 of the NMC standards that say nurses are responsible for monitoring the NG tube. This a failing. Although there is no guidance to say how regular NG tube checks should be, taking account of our clinical advice we would expect monitoring to take place at least every four hours, unless medical advice said otherwise.
26. We go on to consider the impact of this failing.
27. As a result of the irregular monitoring of Mr Q’s NG tube and collection bag, Mrs Q says he aspirated gastric content onto his lungs, developing into pneumonia and causing his death to be more painful and traumatic.
28. Our nursing adviser says aspiration is common even in healthy patients. Mr Q was already at an increased risk of aspiration pneumonia due to his condition and being unable to swallow, along with the vomiting he experienced from the small bowel obstruction. The NG tube was used to reduce the risk of aspiration by draining gastric contents off the stomach, but there would still be a risk. But, our geriatrician adviser confirms regardless of any risk, if the NG is not working, the contents of the stomach can build up, causing the patient to vomit.
29. Mr Q did vomit and aspirate in the morning of 30 December. But, it is impossible for us to know exactly when Mr Q’s NG tube came out of place, when he started vomiting or how long it had been going on for before the nurses checked at 10.30am.
30. Our colorectal adviser says that when an NG tube comes out of place, from the end of the bed it may look like the NG tube is in place but careful inspection would show that it is not working or it is even curled up at the back of the patient’s throat. A badly placed NG tube is the same as having no NG tube in place but also with having the added irritation of a plastic tube in the nose/back of the mouth. It is not possible for us to say when the NG tube came out of place, but we think it is likely that Mr Q started vomiting and aspirating in the five-hour window from 5.30am, when staff completed routine observations, and 10.30am.
31. As Mr Q was at a high risk of aspiration due to his condition, we think there were missed opportunities (within the five-hour window) to drain Mr Q’s collection bag and make sure the NG tube was in place. This may have prevented him vomiting and the tube coming out of place.
32. Although we have established that Mr Q was at an increased risk of aspiration and developing pneumonia, the lack of monitoring caused Mr Q’s stomach contents to build up and for him to vomit. Due to Mr Q’s condition, he had no way of telling staff he was feeling unwell or that there may be an issue with the NG tube. Our geriatrician adviser confirms that aspirating vomit into the lungs causes aspiration pneumonia.
33. If the NG tube had been monitored and managed more often, our colorectal adviser says it is likely that Mr Q would have been more comfortable towards the end of his life because there is a chance he may not have vomited causing him to aspirate and develop aspiration pneumonia.
34. To summarise, we cannot rule out that Mr Q would not have aspirated if the NG tube and collection bag was checked more often. But, if checks were completed more often, we know the NG tube coming out of place and Mr Q’s vomiting would have been found sooner which may have improved his discomfort in his final days. We realise the degree of uncertainty around not knowing this will be distressing to Mrs Q and this is an injustice to her.