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Showing posts with label planning. Show all posts
Showing posts with label planning. Show all posts

Friday, May 9, 2008

Quick Review of “Definitive Care for the Critically Ill During a Disaster”

This week the report from the “Task Force for Mass Critical Care Summit, January 26–27, 2007” was published in CHEST. The series is titled “Definitive Care for the Critically Ill During a Disaster”. It consists of five separate articles subtitled:
  • Summary of Suggestions From the Task Force for Mass Critical Care Summit
  • Current Capabilities and Limitations
  • A Framework for Optimizing Critical Care Surge Capacity
  • Medical Resources for Surge Capacity
  • A Framework for Allocation of Scarce Resources in Mass Critical Care

I quickly read through all these papers this week. I will review each of them in more detail in upcoming postings. You can get all five of the published articles for free at this location. Thank you CHEST for supplying these articles for free. If you are involved in pandemic planning, I urge you to download these papers and read them. They offer many suggestions and solid frameworks for planning your response to a mass critical care incident.

The publishing of these papers has generated a few news reports this week. Most of the newspaper articles were sensational, focusing mainly on the list of classes of people that would be excluded from care. Here are a couple of news links. AP, Globe and Mail.

When you read these news articles you would think that the summit meeting was all about denying care. When you read the actual papers you will see that the summit was really about providing the best care possible under various worsening and even the nearly hopeless conditions that could possibly occur. The sensational articles referred to the list of recommendations of who would be refused care in the most severe crisis. This list was merely a suggestion, and the authors state in the papers that there must be an ethical discussion of these issues by non medical professional people to determine whether society will accept these criteria.

The papers do not focus only on pandemic planning, but stress that plans must be flexible enough to account for many different types of mass casualty incidents. The included charts list nearly every type of incident and the appropriate responses. Still the main focus is on pandemic preparedness. Short of a nuclear war, a severe pandemic is probably the incident that would most stress the existing critical care infrastructure.

Some of the papers I have read before these on pandemic planning were very complex and tedious to follow. Many other papers focus on the numerous problems, give many “what if “ scenarios and concentrate a lot on how little we know. These papers focus more on how to get to a solution rather than moaning about the hopelessness of it all. The planning goals are focussed on three main areas; stuff, staff, and space. Essentially they say you have to have enough of each. If you are well prepared in two areas and short in the third, you are still limited by that area. They focus less on trying to predict the severity of any incident and more on how hospitals can maximize their ability to respond.

Stuff is things like ventilators, medications, PPE and other medical supplies. Staff is the number of staff that are not affected by the event plus the number of addition personnel that can be trained and used as well as how much you can increase the number of patients existing staff can care for. Space is the suitable areas that can be used to provide complex critical care.

In a nutshell, they recommend that facilities aim to increase by a factor of 3, the amount of critical care (including ventilators) they can provide, and also stockpile enough supplies to last about 10 days, with perhaps some additional buffer, and to ensure they can maximize their staffing and space to make this possible. I think these are very good recommendations. They are very similar to the recommendations I posted on the BMG website last year. I also suggested that facilities try to increase their ability to manage ventilated patients by up to a factor of 3 in one of my posts last year.

They warn that manual ventilation will not work. They are very skeptical that sharing ventilators among several patients will work with real patients that have ARDS. They provide an extensive list of requirements that facilities should look for when purchasing ventilators for surge capacity, but acknowledge that is unlikely that anyone will actually buy that many ventilators ahead of time. They also provide a much shorter list of the minimum requirements for a ventilator in suggestion 3.2:

(1) be able to oxygenate and ventilate most pediatric and adult patients with either significant airflow obstruction or ARDS
(2) be able to function with low-flow oxygen and without high-pressure medical gas
(3) accurately deliver a prescribed minute ventilation when patients are not breathing spontaneously
(4) have sufficient alarms to alert the operator to apnea, circuit disconnect, low gas source, low battery, and high peak airway pressures

The pandemic ventilator should be able to meet those short list minimum requirements.



P.S.
My son Jeff is taking his own pandemic ventilator design “Norman” to the Canada Wide Science Fair in Ottawa this week. I will have a more detailed report on “Norman” next week. I think you will be impressed with the work Jeff has done. I am.

Sunday, April 20, 2008

Are the Ventilator Numbers Real?

Last week I wrote about why there is a need for a pandemic ventilator and used facts, numbers and statistics from various sources to support my statements. Whenever I write an article, I generally compose it, then go back to a list of articles and websites I have saved to validate what I have written. Most of the information is easy to validate, but I always find it difficult to come up with verifiable numbers. Often I see the same number used in many reports and assume that it must be correct. It may be though, that everyone is just referencing the same inaccurate source.

The numbers for US ventilators and usage I used last week are ones that I have commonly seen used in other places. I got a good comment on the article that suggested that the actual number of ventilators may be lower, and that usage rates may also be a bit lower as well. I have had some concern with the inability to obtain good solid numbers.

When I reviewed the Ontario Health Plan for an Influenza Pandemic, I noted that the per capita numbers of ventilators for Ontario was significantly lower than the US numbers. Ontario has a comprehensive socialized medical system that treats everyone needing care, and I have never heard of anyone being refused the use of a ventilator in Ontario that required one. I checked the pandemic plans for the region where I live and also the hospital I work at, and the number of ventilators is pretty close to what you would expect from the numbers in the OHPIP report based on population. The utilization rates though are usually pretty high, and it is not uncommon for a hospital to borrow vents from other hospitals if they run short.

The 105,000 number for the number of ventilators in the US for the US population size is 4 times as many as the ratio in Ontario. It is hard to believe that it should be so different. Even the 70,000 number quoted by the comment last week seems high by this criteria.

I think that every pandemic plan should explicitly state how many ventilators they have, and what the utilization rates are. They should also have a good idea of how much they believe that they can extend the capacity of their staff to handle additional ventilated patients if the additional ventilators were made available. Proper planning requires that they know the present status, calculate how much they can extend their capabilities, and compensate as much as possible for any shortfalls in staff or equipment. I have seen very few plans that give figures for all these variables. If they do not have good numbers to base the plans on they are really just guessing.

Friday, April 4, 2008

WWSEF Science Fair Results

Below is the pandemic ventilator prototype "Norman". Norman was built by one of our developers in his automation and robotics class.

This prototype is named “Norman” after Norman Burn. Norman Burn was the Chief Technician at the Department of Anesthesia at Newcastle. Norman Burn built many of the very first positive pressure ventilators. Some of his “home made” ventilators were used during the polio epidemic in Britain in 1947. (link here)

This developer is a high school student and has contributed to the Pandemic Ventilator Project right from the beginning. He has added many insights to the design of the project and did all the PLC programming for "Max" as well as his current prototype. He entered "Norman" in the Waterloo Wellington Science and Engineering Fair.


The Pandemic Ventilator at the Science Fair


He won 3 awards at this Science Fair:
  • Silver Medal in the Senior Engineering Division
  • The University of Ontario Institute of Technology Innovation Award for demonstrating the most innovative development, adaptation or use of technology in a science project.
  • An Award of Merit
In addition to the awards, his project has been accepted to participate in the National Canada Wide Science Fair to be held in Ottawa Canada from May 10 to May 18th 2008.

We congratulate him on his hard work and dedication.


Receiving the Silver Medal Award
for Senior Engineering



Receiving the University of Ontario Institute of Technology
Innovation Award for Demonstrating the Most Innovative Development,
Adaptation or Use of Technology in a Science Project




Receiving the Award of Merit

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Correction

It seems there was an error made at the awards ceremony. Instead of the silver medal he was awarded, he was supposed to have received a gold medal and several university and college scholarships. So, we congratulate Jeff on his gold medal award. Here is a link to the official site.

Here are the awards he was supposed to have received:
  • Award of Merit,
  • Gold Medal, Senior Engineering,
  • University of Ontario Institute of Technology Innovation Award,
  • Conestoga College Entrance Scholarship,
  • University of Guelph Entrance Scholarship,
  • University of Waterloo Entrance Scholarship.
  • Wilfrid Laurier University Entrance Scholarship.
His project is also entered in the Canada-Wide Science Fair