Prevention of Future Deaths reports · 2021

Mary Land

Regulation 28 report to prevent future deaths, reference 2021-0322, written 29 Sep 2021. A coroner writes one of these when an inquest reveals a risk that could cause further deaths unless something changes.

Date of report29 Sep 2021
Reference2021-0322
DeceasedMary Land
CoronerKevin McLoughlin
Coroner areaWest Yorkshire (East)
CategoryHospital Death (Clinical Procedures and medical management) related deaths · Product related deaths
Organisation namedMid Yorkshire Hospitals NHS Trust
Sourcejudiciary.uk record · original PDF
Responses published4

The report

Text recovered by OCR from a scanned PDF. OCR is imperfect: check anything you rely on against the source PDF. Reproduced verbatim, including the scan's own layout.

ANNEX A

REGULATION 28: REPORT TO PREVENT FUTURE DEATHS (1)

REGULATION 28 REPORT TO PREVENT FUTURE DEATHS
THIS REPORT IS BEING SENT TO:
1. Philips Respironics

2. The Rt Hon Sajid Javid MP, Secretary of State for Health and Social Care
3. Mid Yorkshire Hospitals NHS Trust

1 | CORONER

lam Kevin McLoughlin, Senior Coroner for the Coroner area of West Yorkshire (East).

2 | CORONER’S LEGAL POWERS

| make this report under paragraph 7, Schedule 5, of the Coroners and Justice Act 2009
and regulations 28 and 29 of the Coroners (Investigations) Regulations 2013.

3 | INVESTIGATION and INQUEST

On 22 February 2021 | commenced an investigation into the death of Mary Land, aged
76. The investigation concluded at the end of the Inquest on 27 September 2021. The

conclusion of the Inquest was a narrative conclusion that Mrs Land died from:

1a Respiratory Failure

2 Obesity hypoventilation, atrial fibrillation, ischaemic heart disease

on 5 February 2021, after the tubes connecting her BIPAP ventilator became detached
from her facemask.

4 | CIRCUMSTANCES OF THE DEATH

On 5 February 2021, Mary Land, aged 76, was a patient on an Acute Respiratory care
unit ‘surge’ ward at Pinderfields Hospital, Wakefield. She was being treated for covid
pneumonia against a background of comorbidities, including COPD. At 5am that
morning, she was discovered in an unresponsive condition, with the tube connecting her
facemask to a BIPAP ventilator detached at the connection point to the mask. The
Inquest was unable to conclude, on the balance of probability, whether this malfunction
contributed to her death, but it remains a possibility, and has the potential to do so in
other cases unless a design solution is found.

5 | CORONER’S CONCERNS

During the course of the Inquest the evidence revealed matters giving rise to concern. In
my opinion there is a risk that future deaths will occur unless action is taken. In the
circumstances it is my statutory duty to report to you.

The MATTER OF CONCERN is as follows. —

The Philips Respironics AF 541 mask connects to the tubing, linking it to the BIPAP
ventilator by means of a ‘push on’ connection (rather than a fitting involving positive
engagement). Evidence taken at the Inquest indicates this connection has come undone
on other occasions as well. The introduction of a filter at the site of this union increases
the potential for the joint to come apart. Consideration should be given to installing a
more robust docking mechanism which is less vulnerable to working loose, or being
inadvertently pulled apart, for example, by a patient suffering from delirium.

ACTION SHOULD BE TAKEN

In my opinion action should be taken to prevent future deaths and | believe you oryour
organisation have the power to take such action.

YOUR RESPONSE

You are under a duty to respond to this report within 56 days of the date of this report,
namely by Monday 22 November 2021. |, the Coroner, may extend the period.

Your response must contain details of action taken or proposed to be taken, setting out
the timetable for action. Otherwise you must explain why no action is proposed.

COPIES and PUBLICATION

| have sent a copy of my report to the Chief Coroner and to the following Interested
Persons:

The family of Mary Land, deceased.

| have also sent this report to the Medicines and Healthcare Products Regulatory
Agency.

| am also under a duty to send the Chief Coroner a copy of your response.

The Chief Coroner may publish either or both in a complete or redacted or summary
form. He may send a copy of this report to any person who he believes may find it useful
or of interest.

You may make representations to me, the coroner, at the time of your response, about
the release or the publication of your response by the Chief Coroner.

29th September 2021 ker. Ma CO

Responses

4 responses published against this report on judiciary.uk. A response is a body's written reply to the coroner's concerns; publication is at the discretion of the Chief Coroner's office, so an absent response does not mean nobody replied.

Response from Department of Health and Social Care Published 1 (PDF)
From Maria Caulfield 
Parliamentary Under Secretary of State  
for Primary Care and Patient Safety  

39 Victoria Street 
London 
SW1H 0EU 

Dear Mr McLoughlin,  

26 January 2022 

Thank you for your letter of 29 September 2021 to Sajid Javid about the death of 
Mary Land.  I am replying as Minister with responsibility for Patient Safety, and am 
grateful for the additional time allowed.     

I would like to begin by expressing how saddened I was to read of the circumstances 
of Mary Land’s death, and I offer my sincere condolences to her family and loved 
ones.  The circumstances your report describes are concerning and it is essential 
that these are carefully explored to ensure the continued safety of these medical 
devices.   

I have been made aware that the Medicine and Healthcare products Regulatory 
Agency (MHRA), the regulator of medical devices and medicinal products, has 
provided a response to your report explaining the actions it has taken in relation to 
this incident and the concerns raised.  You will therefore be aware that following the 
outcome of the inquest into Mrs Land’s death, Phillips Respironics has extended its 
investigation to look at the connection tubing and facemask. Phillips has also been 
asked by the MHRA to investigate the potential impact on performance of the 
breathing circuit of using a filter in the facemask.  A final report of the investigation 
has been requested by the MHRA, and the MHRA will ensure that the investigation 
has been conducted in line with the relevant regulations and that any corrective 
action identified is taken.   

In addition, MHRA will discuss with the British Thoracic Society and the National 
Institute for Health and Care Excellence whether an update is required to guidance 
relating to the management of COVID-19 patients and, specifically, ensuring that 
guidance on the prescribing and setting up of breathing circuits and use of filters is in 
line with breathing system device manufacturer’s instructions.  

MHRA have also reviewed the current International Organisation for Standardization 
standards for connectors used within a breathing circuits and have conducted a 
stakeholder engagement with the Association of Respiratory Nurses in order to seek 
feedback on the use of breathing masks, tubing and filters and the means of 
connecting them to make a complete breathing circuit 

I am advised that the Mid Yorkshire Hospitals NHS Trust has taken learning from its 
own investigation of the circumstances around Mrs Land’s death.  This includes 
actions relating to the response to the device alarm.  I am further advised that the 
Care Quality Commission (CQC) is satisfied with the Trust’s action plan and will 
continue to monitor the Trust in line with its current regulatory approach.  

 
 
 
 
 
 
 
 
 
 
 
 
 
 Finally, it is vitally important that local organisations and system-level leaders reflect 
carefully on, and take learnings from, the circumstances of deaths related to the 
Covid-19 pandemic, such as that of Mrs Land, and I am grateful to you for bringing 
these concerns to my attention. It is right that there is an active and continuous 
process of learning, adapting and responding to the challenges of the Covid-19 
pandemic and you will know that the Prime Minister has announced that there will be 
a full statutory inquiry into the Government’s response to the Covid-19 pandemic, 
beginning in Spring 2022, to identify national learnings.   

I hope this response is helpful. 

MARIA CAULFIELD MP 
PARLIAMENTARY UNDER SECRETARY OF STATE 
FOR PATIENT SAFETY AND PRIMARY CARE
Response from Mhra Published 1 (PDF)
Mr Kevin McLoughlin 
Senior Coroner 
for the County of West Yorkshire 
(Eastern District) 
71 Northgate 
Wakefield WF1 3BS 

Medicines & Healthcare products 
Regulatory Agency 

10 South Colonnade 
Canary Wharf  
London  
E14 4PU 
United Kingdom 

gov.uk/mhra 

18 November 2021 

Dear Mr McLoughlin 

Regulation 28: Inquest to investigate the death of Mary Land 

We acknowledge your Regulation 28 prevention of future death report, received by MHRA on 29 
September 2021 relating to the conclusions of the inquest investigating the death of Mary Land at 
Pinderfields Hospital, Wakefield and your concern included in report that consideration should be given 
to a design change for the devices and connectors within breathing circuits. 

You copied us into the report for information as the UK medical device regulator. I have taken the 
opportunity to provide you with some supporting information below, before providing comments to your 
matters of concern. 

As you may be aware, the Medicines and Healthcare products Regulatory Agency (MHRA) is an 
executive agency of the Department of Health and Social Care and is responsible for the regulation of 
medical devices and medicinal products.   

One of the MHRA’s responsibilities is to collect, analyse, monitor and act on information relating to 
safety concerns from a range of data sources including reports of adverse incidents involving medical 
devices.  

Patient safety is our highest priority and we encourage everyone to report safety concerns to the 
MHRA through our Yellow Card scheme.  It is mandatory for manufacturers of medical devices to 
report incidents where the device is suspected or known to have contributed to the adverse event to 
MHRA.  

When an adverse incident occurs and is reported either to the manufacturer directly or via Yellow 
Card, the manufacturer is responsible for carrying out any investigation required and informing MHRA 
of their findings.   We evaluate and view all incidents in the context of other reports and data 
sources to determine if there is a potential safety signal for investigation and whether further action 
is needed. 

 
 
 
 Where necessary and when the Agency’s criteria have been demonstrated and agreed to have been 
met, we will issue safety messages to health and care organisations, patients, and the public.   

Manufacturers of medical devices considering a design change are expected to follow the principles 
set out in BS EN ISO 14971:2019 Medical devices. Application of risk management to medical 
devices. Each design feature should be methodically considered in terms of the hazards and risks it 
could introduce and then a process of analysis, evaluating and mitigation should be conducted to 
reduce any residual risk to be a low as reasonably practicable. 

This approach aims to ensure that any unintended new risks associated with the design of the device 
itself are appropriately managed and minimised, however it may not be possible to identify all potential 
unintended consequences in advance of the device being used in the intended use scenario. The risk 
management process is therefore an ongoing one throughout the product lifecycle. 

Manufacturers should demonstrate how their devices meet the relevant Designated/Harmonized 
Standards. If they have not applied these standards, then they must provide a description of the 
solutions adopted to fulfil the requirements which apply to the devices.  This information should be 
included within their technical documentation for the devices. 

Under the current UK medical device regulations manufacturers should inform and seek approval from 
their Notified Body of certain changes to the device or of the quality system. The requirements differ 
depending upon the route taken for conformity assessment however the guiding principle is that any 
change which could affect conformity with the essential requirements should be notified and approved 
prior to the updated device being placed on the market or put into service.  

An evidence base exists across a range of types of devices supporting a proposition that when users 
of devices are not familiar with the device or there is a change in design or handling technique this can 
also contribute to errors and lead to patient harm. Healthcare professionals operating and monitoring 
the use of devices need to be supported with training and clear protocols on correct and safe device 
use.  

Action undertaken by MHRA to date 

On receipt of the regulation 28 letter we conducted a search of our database of reported adverse 
incidents to confirm whether the incident had been reported by Philips Respironics in line with the 
requirements set out in UK MDR 2002. The incident had not been reported. 

We instructed Philips to report this incident to MHRA which they have now done. They informed us that 
the initial focus of investigation was on the BiPAP ventilator but following the inquest, the connection 
tubing and face masks are now being investigated. We requested they provide all available information 
established during their investigation to date. Their investigation has not been completed and a final 
investigation report has not yet been provided to MHRA. We have assessed the following facts may be 
relevant to future actions: 

-  The Philips devices involved in this incident were a Trilogy EVO BiPAP machine and a AF541 face 
mask. The AF541 has been in the market since August 2016 and the Trilogy EVO was launched in 
the UK market in August 2019.  

-  The elbow connection point of the AF541 and all masks manufactured by Philips conform to 

requirements of BS EN ISO 5356-1 2004 Conical Connectors. This is not the latest version of the 
standard. 

-  A clear guard filter manufactured by Intersurgical was fitted between AF541 elbow and the tubing. 

The inclusion of a filter in the breathing circuit is not supported by Philips. MHRA has asked Phillips 
to investigate the potential impact on the performance of the breathing circuit of using the filter.  
-  The hospital report to Philips stated that the filter was used in accordance with recommendations 

during the pandemic provided by the British Thoracic Society. We have confirmed with the Society 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 that specific guidance regarding the use of filters was introduced during the COVID-19 pandemic 
response. This was in collaboration with NICE. 

-  Philips has confirmed that the Trilogy EVO device has alarms to detect a disconnected circuit and 

the hospital has confirmed that the device alarm did sound during this incident. MHRA has 
requested more information about the incident from the hospital. 

We have reviewed the current versions of ISO standards for connectors used within breathing circuits: 
BS EN ISO 5356-1:2015 and BS EN ISO 5356-2:2012. 

BS EN ISO 5356-1:2015 defines the dimensions and test methods for cone and socket connections for 
breathing circuit components. The purpose of the standard is to ensure interchangeability between 
components from different manufacturers whilst maintaining a secure connection and at the same time 
enabling connection and disconnection by the operator. To minimise the risk of accidental 
disconnection the standard recommends a “latched” socket, also defined within the standard. 

BS EN ISO 5356-2:2012 defines “Screw-threaded weight-bearing connectors” which are intended for 
mounting heavy or fragile components of a breathing circuit. 

In October 2021 we conducted stakeholder engagement with the Association of Respiratory Nurses in 
order to seek qualitative feedback on the use of breathing masks, tubing and filters and the means of 
connecting them to make a complete breathing circuit. In summary they stated that, connections 
between masks and hoses are universal and all push-fit allowing for compatibility between the various 
manufacturer’s equipment.  If the connection became a screw-thread style, then the ability to change 
the consumable components, when required and when in situ, would be more difficult. It could cause 
components to seize up, making quick changes difficult.  This could put in place a further risk, when a 
patient is dependent on therapy, and a quick mask/hose change is needed. They also acknowledged 
that the risk of disconnection is no more than patients removing masks themselves.  The hoses and 
masks fitting do not often come apart when fitted correctly. 

Further action to be undertaken by MHRA 

By the end of November 2021: 
-  Agree with Philips Respironics their investigation plan and a regular schedule for updates to be 
provided to MHRA, ensuring it is concluded in line with their regulatory obligations and any 
corrective actions identified are conducted. This includes ensuring they assess the impact of the 
connection design and the inclusion of the filter within the breathing circuit on the disconnection 
event and patient harm and measures to minimise this risk in the future 

-  Engage with Philips Respironics regarding maintaining compliance to the latest version of relevant 

and Designated or Harmonised Standards 

-  Contact the British Thoracic Society and NICE to agree a time to discuss updating the published 

guidance relating to the management of COVID-19 patients to ensure that health care 
professionals prescribing and setting up breathing circuits and the inclusion of filters are in 
accordance the breathing system device manufacturers’ instructions. 

Ongoing: 
-  Continue to assess incoming data which identifies a new safety signal with these types of devices 

and take action when required. 

Conclusion 

Pending the conclusion of the actions detailed above, we will continue to monitor our reports and if 
further evidence should emerge we will review and take any necessary action.   

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Yours sincerely 

Chief Safety Officer 

Medicines and Healthcare Products Regulatory Agency 
10 South Colonnade, Canary Wharf, London, E14 4PU 

gov.uk/mhra  
Stay connected
Response from Mid Yorkshire Hospitals Published 1 (PDF)
Date: 22 November 2021 

Mr Kevin McLoughlin 
HM Senior Coroner 
West Yorkshire (Eastern District) 
HM Coroner’s Service 
71 Northgate 
Wakefield 
WF1 3BS 

Dr 
Medical Director 
Trust Headquarters and Medical Education 
Centre 
Aberford Road 
Wakefield 
WF1 4DG 

Dear Mr McLoughlin 

Re Inquest of Mary LAND (dcd) – 21.11.1944 to 05.02.2021 – 

I am responding on behalf of the Trust to the Regulation 28 Report to Prevent Future 
Deaths that you issued on 29 September 2021 jointly to Philips Respironics, The Rt 
Hon  Sajid  Javid  MP,  Secretary  of  State  for  Health  and  Social  Care,  and  The  Mid 
Yorkshire Hospitals NHS Trust (MYHT).   

The Matter of Concern raised in your report was: 

The  Philips  Respironics  AF541  mask  connects  to  the  tubing,  linking  it  to  the 
BiPAP  ventilator  by  means  of  a  ‘push  on’  connection  (rather  than  a  fitting 
involving positive engagement).  Evidence taken at the Inquest indicates this 
connection has come undone on other occasions as well.  The introduction of 
a filter at the site of this union increases the potential for the joint to come apart.  
Consideration should be given to installing a more robust docking mechanism 
which is less vulnerable to working loose, or being inadvertently pulled apart, 
for example, by a patient suffering from delirium.  

As you acknowledged during the Inquest, the Trust conducted a very open and candid 
significant event RCA investigation into this tragic incident and identified four actions 
in response to recommendations arising from the investigation.   

We subsequently undertook these actions and I am able to confirm that all four actions 
were completed by 4 August 2021 (refer Attachment 1).  

The following recommendation and its corresponding action are of specific relevance 
to the Matter of Concern. 

 
 
 
 
  
 
 
 
 
 Recommendation  2: Scope and discuss with  regional  units  if  there  can  be  an 
improvement on securing tubing circuit connections 

Action  2:  To  understand  if  manufacturer  or  other  solution  [is  available]  to 
provide greater tubing circuit connection stability. 

The inclusion of a filter to manage COVID-19 patients was recommended as part of 
the British Thoracic Society (BTS) Guidance issued in Wave 1 of the Pandemic (refer 
Attachment 2).  At date, this advice remains current and is considered best practice 
for infection prevention and control purposes of COVID-19 patients on non-invasive 
ventilation.   

Unfortunately, the additional filter component inserted between the facemask and the 
ventilator tubing  may  have  contributed  to  destabilisation  of  the  circuit,  although  this 
cannot be clinically proven, and there is no current research/evidence to confirm or 
reject the theory that the additional filter caused/causes destabilisation of the circuit.  

Following  the  Inquest,  the  Trust  has  had  further  internal  discussions  with  our 
Respiratory Team, including our lead for Non-invasive Ventilation (NIV), regarding the 
use of the filter.  The presence of the filter is still considered beneficial in preventing 
the  transmission  of  COVID-19  and  as  such,  the  Trust  continues  to  use  the  filter  in 
accordance with the BTS guidance. 

Of  note,  at  the  time  when  the  incident  was  investigated  and  design  solutions  were 
researched,  there  was  no  all-in-one  circuit  available,  i.e.  where  the  filter  was  an 
integral constituent of the mask, rather than an optional add-on component.  As such, 
the  Trust  thanks  you  for  raising  this  issue  directly  with  the  manufacturer,  Philips 
Respironics. 

I trust this advice is helpful and thank you again for raising this important matter with 
us. 

In closing, on behalf of The Mid Yorkshire Hospitals NHS Trust, I would also like to 
take this opportunity to once again offer our sincere condolences to Mrs Land’s family 
in relation to her sad death. 

Yours sincerely 

Dr 

Medical Director
Response from Philips Published 1 (PDF)
Kevin McLoughlin 
Senior Coroner, West Yorkshire (Eastern) 
Coroner’s Office and Court 
71 Northgate 
Wakefield, WF1 3BS 

November 22, 2021 

Dear Sir, 

(cid:53)(cid:40)(cid:54)(cid:51)(cid:50)(cid:49)(cid:54)(cid:40)(cid:3)(cid:55)(cid:50)(cid:3)(cid:53)(cid:40)(cid:42)(cid:56)(cid:47)(cid:36)(cid:55)(cid:44)(cid:50)(cid:49)(cid:3)(cid:21)(cid:27)(cid:3)(cid:53)(cid:40)(cid:51)(cid:50)(cid:53)(cid:55)(cid:3)
Listed  below  is  the  concern  described  in  the  Regulation  28  report  reference  above,  followed  by  the  Philips 
response. 

(cid:38)(cid:82)(cid:81)(cid:70)(cid:72)(cid:85)(cid:81)(cid:29)(cid:3) During the course of the Inquest the evidence revealed matters giving rise to concern.  In my opinion 
there is a risk that future deaths will occur unless action is taken.  In the circumstances it is my statutory duty to 
report to you.  The MATTER OF CONCERN is as follows.  The Philips Respironics AF 541 mask connects to the 
tubing, linking it to the BiPAP ventilator by means of a ‘push on’ connection (rather than a fitting involving positive 
engagement).  Evidence taken at the Inquest indicates this connection has come undone on other occasions as 
well.  The  introduction  of  a  filter  at  the  site  of  this  union  increases  the  potential  for  the  joint  to  come  apart. 
Consideration should be given to installing a more robust docking mechanism which is less vulnerable to working 
loose, or being inadvertently pulled apart, for example, by a patient suffering from delirium. 

(cid:51)(cid:75)(cid:76)(cid:79)(cid:76)(cid:83)(cid:86)(cid:3)(cid:53)(cid:72)(cid:86)(cid:83)(cid:76)(cid:85)(cid:82)(cid:81)(cid:76)(cid:70)(cid:86)(cid:3)(cid:85)(cid:72)(cid:86)(cid:83)(cid:82)(cid:81)(cid:86)(cid:72)(cid:29)(cid:3) 
The  AF541  mask  elbow  design  is  a  22mm  non-latching  conical  connection  compliant  with  ISO  5356-1.  This 
design  is  not  intended  to  prevent  accidental  disconnection.  The  AF541  mask  is  contraindicated  for  use  with 
patients requiring life support ventilation. 

During this incident, it is alleged that the AF541 mask was in use with a Trilogy EVO ventilator.  The Trilogy EVO 
Clinical  Manual  states,  “To  prevent  patient  or  ventilator  contamination,  you  must  use  a  Philips  Respironics-
approved main flow bacterial filter on the patient gas outlet port.”  An Intersurgical clear guard filter (part number 
unknown) is reported to have been fitted between the AF541 mask elbow and the tubing. This configuration is not 
approved by the manufacturer. The Intersurgical clear guard filter is not approved by Philips, and Philips is unable 
to verify the safety or performance of a device using an unapproved filter in an altered configuration. 

The  AF541  mask  in  use  was  not  retained  due  to  COVID-19  contamination.  The  manufacturer  received  the 
ventilator’s event logs.  On the day of the event, 5 February 2021, the below alarms occurred between 03:14:44 
and 04:26:24. 

(cid:36)(cid:79)(cid:68)(cid:85)(cid:80)(cid:3) 
Low Inlet Oxygen Pressure 
Circuit Disconnect 
Low Inlet Oxygen Pressure 
Circuit Disconnect 
Low Inlet Oxygen Pressure 
Circuit Disconnect 
Low Inlet Oxygen Pressure 
Circuit Disconnect 
Circuit Disconnect 

(cid:39)(cid:88)(cid:85)(cid:68)(cid:87)(cid:76)(cid:82)(cid:81)(cid:3) 
114 seconds 
45 seconds 
2 seconds 
45 seconds 
27 seconds 
37 seconds 
14 seconds 
853 seconds 
820 seconds 

Page (cid:20) of (cid:21)(cid:3) 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
   
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
   
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 The last two circuit disconnect alarms logged were not acknowledged for a total of more than 27 minutes.  Shortly 
after 5:00:00, the ventilator was turned off.  Based on the information reviewed by the manufacturer – specifically 
the greater than 30 minutes of active alarming of the device, hospital verification that the circuit disconnect alarm 
sounded,  incorrect  connection  of  an  inline  filter,  and  use  of  an  unapproved  inline  filter,  Philips  Respironics 
concludes that the AF541 mask and Trilogy EVO ventilator operated as designed.  The facility apparently failed 
to follow the manufacturer’s instructions and did not respond appropriately to ventilator alarms.  In addition, the 
mask at issue meets the applicable standard for mask to circuit connection.  Therefore, no action for the design 
of the AF541 22mm non-latching conical connection is proposed. 

Notwithstanding the Coroner’s duty to share a copy of this response with the Chief Coroner, Philips requests prior 
notification for the further release or publication of this response in a complete or redacted or summary form. 

Philips wishes to formally record that it was not requested to provide evidence to the Coroner prior to, or at, the 
inquest in respect of the functionality or use of the AF541 mask or Trilogy EVO  ventilator – either generally,  or 
specifically in relation to their use on the patient at Pinderfields Hospital. Such evidence would have been provided 
as set out above which, we assert, may have provided the opportunity  for clarification of the matter of concern 
during the inquest. 

Best regards, 

Quality System Manager, Post Market Surveillance 
Philips Respironics - Sleep and Respiratory Care 

Page (cid:21) of (cid:21)(cid:3)

Related reports

Other reports by Kevin McLoughlin

See all →

More reports categorised “Hospital Death (Clinical Procedures and medical management) related deaths”

See all →

Track Mid Yorkshire Hospitals NHS Trust

See every Prevention of Future Deaths report matching Mid Yorkshire Hospitals NHS Trust, and how often a new one appears.

What would an alert for this have sent me? Search the full text

Free to try — the preview shows the real matches and how many arrived in the last 12 months. Your first email alert is free.

These reports are published by the Chief Coroner's office at judiciary.uk and are © Crown copyright. The text here is reproduced from the published PDF so it can be searched. If something on this page is wrong, or you are a person named in it and want it reviewed, email drcjar@gmail.com and we will act promptly.