Blood Gas Analysis and Critical Care Medicine

Blood Gas Analysis and Critical Care Medicine
JOHN W. SEVERINGHAUS, POUL ASTRUP, and JOHN F. MURRAY

Departments of Anesthesiology and Medicine, and the Cardiovascular Research Institute, University of California San Francisco, and the San Francisco General Hospital Medical Center, San Francisco, California; and Department of Clinical Chemistry, Rigshospitalet, Copenhagen, Denmark

Critical care medicine is one of the newest and most rapidly growing medical specialties. Surprisingly new, in fact, because critical care medicine is, basically, applying physiologic principles to the care of seriously ill patients, something physicians have been trying to do for centuries. Modern critical care medicine is distinguished from its predecessors by incredible products of technology, advances in biochemistry, and astonishing know-how. We now have at our disposal sophisticated monitoring devices that provide moment to moment information about key circulatory and respiratory physiologic variables, how they are deranged by disease, and how they respond to intervention. We also have available an astonishing variety of high-tech instruments and powerful medications that we use to remedy ailing physiology, ventilators for breathing, machines to rid the body of excess fluid and impurities, vasopressor drugs to shore up flagging blood pressure, and even instruments to supplement a failing heart. Another distinguishing feature of critical care medicine is that it is practiced in specialized facilities, intensive care units, within acute care hospitals; these focal points for costly instrumentation are also headquarters for the expertly trained and knowledgeable physicians, nurses, and other professionals who care for desperately ill patients.

This paper retraces the history of the development of knowledge about blood gas transport, including the discovery of oxygen and carbon dioxide, the evolution of techniques to measure respiratory gases in the blood, and finally, how all this came together in Blegdamshospital, Copenhagen, on August 25, 1952, when an ingenious anesthetist, Bjorn Ibsen, came out of the operating room and started the modern critical care movement. We conclude with some comments about the remarkable changes that have occurred during the 45 years between then and now, and we make a few speculations about what the future might have in store.

BLOOD GAS TRANSPORT

According to Hippocrates (460-377 BC), good health resided in a proper balance among the four humors: blood, phlegm, black bile, and yellow bile, a balance that depended on the generation of life-giving heat within the left ventricle. Aristotle (384-323 BC) concluded that arteries carried air, but Erasistratus of Cos (about 330-250 BC) taught that "pneuma," created within the left ventricle from lung air, was the substance pumped through arteries to the tissues. Galen (130-199 AD) believed that the heart sucked blood-cooling air from the lungs into the left ventricle where the vital heat was generated, that pneuma was transported in arteries to the tissues, hence to veins via anastomoses, and that after arriving back in the heart, blood passed through minute pores in the septum from the right into the left ventricle for replenishment. These ideas went unchallenged by physicians until the 16th century.

Michael Servetus (1511-53) studied and practiced medicine, but his principal interest became theology (1). In Christianismi Restitutio (1553), Servetus contradicted Galen, concluding that the communication between the right and left sides of the heart was "not through the middle wall of the heart . . . but by a very ingenious arrangement the subtle blood is urged forward by a long course through the lungs," the first postulate of the existence of pulmonary capillaries. Severtus sent his book to John Calvin, who considered it heresy, had him arrested, jailed, and burned at the stake within the year of publication.

It remained for William Harvey (1578-1657), a brilliant anatomist and physician, to describe the circuit of blood flow around the body, including its circulation through the lungs. In his monumental De Motu Cordis (1628), Harvey flatly stated that blood was pumped from the right ventricle through the pulmonary circulation to the left ventricle, passing through "the invisible porosities of the lungs and the minute connections of the lung vessels." These theoretic pulmonary porosities became anatomic reality when first seen by the celebrated Italian microscopist Marcello Malpigi (1628-94) (2). Thus, the anatomy of the circulation was concisely described, but the nature of the vital ingredient by which breathing fed the inner life-giving flame remained elusive. It took over 100 years to find it.

Discovery of Carbon Dioxide

Joseph Black (1728-99), who became Professor of Chemistry in Edinburgh, showed while he was a medical student that large quantities of a gas, which he called "fixed air" (carbon dioxide), were generated by heating or acidifying chalk. He was the first to prove that the same gas was present in exhaled air (3).

Discovery of Oxygen

Robert Boyle (1627-91) established the fact that the long-sought, life-sustaining substance was contained within air itself (4). His assistant, Robert Hooke (1635-1703), demonstrated in 1667 that a dog whose exposed lungs had multiple pleural punctures could be kept alive by providing a constant flow of air through the trachea without any movement of the lungs. Hooke showed, as had Richard Lower (1631-91), that arterialization of blood in the lungs occurred through the introduction of fresh air. No one noted that something was taken out of the air and something else was added.

The English Unitarian "dissenting" minister and amateur chemist, Joseph Priestley (1733-1804), who lived next door to a brewery, got interested in the waste gas product of fermentation and started investigating gases. He discovered that the gas given off by heating mercuric oxide caused a much brighter flame than plain air. In 1774, he showed that this gas was essential not only to combustion, but also to respiration and to the greening of plants. Priestley was the first to demonstrate that ordinary air, in which a candle would no longer burn and a mouse no longer live, might regain its former vital properties if green plants were kept within the sealed chamber. He eventually managed to isolate 10 new gases, including nitrous oxide and carbon monoxide, invented carbonated beverages, gum rubber erasers, and refrigeration. In 1791 his Birmingham home was burned and his laboratory trashed by a royalist-sectarian mob incensed by his support of the French revolution. He emigrated with his family to Pennsylvania in 1794. Priestley was one of the great social and political minds of the Enlightenment. He had a significant influence on his good friend Thomas Jefferson, and had his portrait painted (Figure 1) by the most famous American painter of the time, Gilbert Stuart.

FOR OUR ENVIRONMENT AND OUR CUSTOMERS' MONEY

FOR OUR ENVIRONMENT AND OUR CUSTOMERS' MONEY
COMBUSTION ANALYSIS
The environment has to deal with ever larger concentrations of pollutants due to the use of all types of combustion processes. Smog formation, acid rain and the constantly increasing number of allergies are a direct result of this development. The path to environmentally friendly energy production must therefore lead to a reduction in the emission of pollutants, which is only possible when the existing equipment is working correctly and defective equipment is taken off line. Flue gas analysis and a flue gas analyser enable you to measure the concentrations of the pollutants present and to adjust your burners for optimal combustion.

This branch can be seen as connected to several very different industries. It has a function as environmental control, as simple air pollution control equipment for its own sake. It can be seen as a supplement to general maintenance services and hence the protection of an investment, and it is also a valuable tool for reducing fuel costs. Known under many names, flue gas analysis, stack emissions monitoring or simply gas analysis. Should it become part of military procedure, we will probably be hearing about gas monitoring, stack as well! If we talk of compliance testing, then the legal aspect of the matter becomes clear, as well as the interest of the EPA in the matter. Without a flue gas analyser, there is no real way of checking your own level of compliance and hence avoiding nasty surprises when official testing with a flue gas analyser is carried out.

Many new sections keep being created. The modern interest in biogas has been increased by the high cost of fuel in recent times and the greenhouse effects caused by simply venting these gases to atmosphere. NO2 has become more of a topic, now that carbon monoxide has generally been reduced. Basically, stack testing is a growing business and will be with us for as long as we burn fossil fuels. Most of this site will employ the British expression, flue gas analyser and not the American flue gas analyzer, although there are some mixtures to be found. The two terms are, of course, identical in meaning. There are many other synonyms in common usage, and these will be mixed freely in some places. I apologise in advance for what may be seen as inconsistency. It is more a planned attempt to make everybody feel at home!

Real-Time Gas Analyzer Products from MKS

Real-Time Gas Analyzer Products from MKS
FT-IR, NDIR, Infrared, Mass Spectrometry, and Residual Gas Analyzer products for Continuous Gas Analysis, Process Monitoring, Stack Emissions, Trace Impurity Detection, Continuous Emissions Monitoring (CEM), Formaldehyde Emissions Monitoring, and Exhaust Gas Analysis
FTIR, NDIR Infrared Gas Analysis Products:
MultiGas™ FTIR-based analyzer products from MKS On-Line Products are capable of ppb to ppm sensitivity for multiple gas species in a variety of gas analyzer applications, such as:

stack emissions monitoring,
continuous emissions monitoring (CEM),
process monitoring,
formaldehyde emissions monitoring,
purity monitoring,
automobile, diesel, and catalyst exhaust monitoring.
InDuct™ FTIR-based gas sensors are used for fault detection, monitoring, control, or endpoint determination.

Process Sense™ is a chamber clean endpoint detector that lowers cost and increases productivity by accurately identifying the end of the chamber clean step in semiconductor and flat panel deposition chambers.



Mass Spectrometry
MKS Mass Spectrometry gas analyzer products are innovative in-situ process monitoring instruments that are fully integrated, application-specific packages, including component residual gas analyzers (RGAs), web-enabled RGA's, analytical equipment, and process RGAs and control software.

Vacuum Monitoring and e-Diagnostics
Ultra High Vacuum (UHV)
CVD Processes
Vacuum Baseline RGA
Ion Implant
Photoresist Detection
High-Pressure RGA

Analyzer is a fully configurable Network Analyzer

Analyzer is a fully configurable Network Analyzer for Win32. It includes several functionalities that are needed by network management operator. Analyzer is based on WinPcap and it is able to capture packets on most Win32 platforms (and link-layer technologies).

Analyzer 3.0 comes out with some event logging, LAN monitoring and traffic monitoring capabilities.

However, Analyzer 3.0 most valuable point is the ability to parse network packets according to the protocol description contained into some external files, which can be modified at run-time by the user. These files are written in the new NetPDL language; for who is interested in that, please read the Protocol Dissectors Section.

We moved the development of Analyzer to the SourceForge.net servers. You can use all their facilities for submitting a request, subscribing the mailing lists, browsing the latest code, and so on.

This program is current being developed at Politecnico di Torino and it is released under a BSD licence. The program is free, but we would like to receive a small contribution from all the companies that are using our tools for business. Please, be honest: if you get (or save) money from our work, let's share part of it with us.

What does Analyzer?
Analyzer is not a simple network sniffer. Here there is a brief summary of what it can do.

Network Sniffer
Analyzer can capture (and display) packets on both the local machine and remote probes, thanks to the full support of the Remote Capture functionality of WinPcap.
Additionally, one of the most valuable point is the ability to parse network packets according to the protocol description contained in external files, which can be modified at run-time by the user. These files are written in the new NetPDL language; for who is interested in that, please read the Protocol Dissectors Section.
Advanced sniffing capabilities
Due to the full support of the WinPcap remote capture capabilities, Analyzer is able to display packets currently being captured on another (remote) host. This can be done even if the remote host is behind a firewall, thanks to the support of the Active Mode remote capture. Additionally, Analyzer supports also sampling in order to reduce the amount of traffic generated by the remote host toward Analyzer. Sampling is available also when capturing from a local interface.
End-to-end Reachability Monitor
Analyzer can monitor the reachability (through a set of ICMP ECHO, aka PING, packets) of remote host, saving data into a database and making additional statistics. The user can later retrieve historical data to see how the reachability of some host changed over time.
Additionally the user can set some alarm (e.g. "send an e-mail") in case of some event (e.g. "host down").
Local Network Host Monitor
Analyzer can discover the presence of the active station on your local network and display their MAC, IPv4 and IPv6 addresses, and their canonical name.
This module can monitor the availability of the stations and signal whether an host is up, is down, and so on. Furthermore, it can detect address spoofing (e.g. when the same IPv4/IPv6 address appears to bind more than one MAC addresses).
Additionally the user can set some alarm (e.g. "send an e-mail") in case of some event (e.g. "possible spoofing").
Network Sessions Logger
Analyzer can monitor the presence of TCP/UDP/ICMP "sessions" over the network, saving a database record for each session detected within a time frame. A summary of the session is then saved into a database for later processing.
Network Data Mining
Analyzer is able to apply Data Mining techniques to the database of the sessions, created with the Network Sessions Logger (NetLogger). This module is able to find some relevant relationships over the data which may be unexpected and it is able to give an insight about how the network looks like (e.g. which are the servers, which are the clients, and more). Furthermore, it can compare the relationships that come out from two different NetLogger databases and display the differences (e.g. a new server has been added to the network).
Event Handling
Analyzer has a module that manages events associated to the other modules and it executes the appropriate actions. The number of events and the actions associated to them are customizable by the user.
WARNINGS
Analyzer is a tool that is still under development. Please be patient when you use it.
Analyzer could not work with earlier versions of Windows 95
Analyzer does not work in Windows CE
Some features could not be supported on all platforms
Analyzer Roadmap
A 3.0 final version of Analyzer should came in Spring 2008.

The 3.0 release will provide a first, affordable tool. For instance, a lot of users are pushing for getting the 3.0 final out, even if some of our objectives (in terms of functionalities) are not reached. Refinements are expected in the next minor releases.

Computer Programs for Social Network Analysis

Computer Programs for Social Network Analysis

Programs that convert data from one format into a different format
Adj2Neg, a program for converting adjacency matrices to NEGOPY-style data in which there is one line of data per link. Each line begins with two ID numbers, telling who the link is from and who it goes to, followed by some values that describe the link (eg. strength, duration, content, channel, time, place, etc...) Besides making the data available for NEGOPY, this makes it much easier to work the data and reduces the number of errors that are inadvertently introduced when attempting to edit the data, especially for larger networks.


Neg2Adj, a program for converting NEGOPY-style data into adjacency matrices for input to UCINET and other programs that require that format. Accepts up to 2,000 nodes and 60,000 links.


Free2Fix, a program that parses and converts free-format files into fixed-format files for MultiNet and other programs that require a fixed format.

The AMAZING "Magical Mind Analyzer" Software - TEST IF YOU ARE PSYCHI

The AMAZING "Magical Mind Analyzer" Software - TEST IF YOU ARE PSYCHI




This is just a screenshot of the software which can be downloaded FREE OF CHARGE "Andyzon1 - Personal Score" file (andys1.gmd ONLY viewable within "MMA" program. Go to your folders PROGRAM FILES then MAGICAL MINDS. Put file "Andys1.gmd" into MAGICAL MINDS folder. You can then view my ACTUAL score GRAPH within "MMA". IMPORTANT - Two years ago, I had a VERY VERY CLEAR "Remote Viewing" dream about using a "NEW REVOLUTIONARY SOFTWARE FOR TESTING FOR PSYCHICS" on my computer. Two years later - in real life - I was COMPLETELY BLOWN AWAY to discover on the internet the EXACT SAME IDENTICAL SOFTWARE I had dreamed about 2 years EARLIER!!! It had only JUST been released!! I downloaded the FREE version of the SOFTWARE and got the biggest SCORE to date!!! The name of the software is the "MAGICAL MIND ANALYZER". THIS IS THE "MIRACLE" TOOL THAT YOU HAVE BEEN SEARCHING FOR!!! THE "MAGICAL MIND ANALYZER PLUS" SOFTWARE CAN BE USED TO CHOOSE THE EXACT WINNING NUMBERS FOR ANY LOTTERY!!!! -------- Letter From Inventor Of Magical Mind Analyzer" - Re: My "Andyzon1 MMA Score";- Hi Andrew: Yes, your results are quite significant. 681 to 1 is a great result! Statistical science uses a 20 to 1 or 95% confidence level as significant. You got 681 to 1 or 99.85% confidence! Also, it looks as though you went the other way a bit at the beginning and at the end. I’ve done that many times. See the inverted focus example on the "It works" page. The sets #10 to 148 were at very powerful ratio of 108.93. If these were different from the rest for some clear reason other than noticing that they are high, we could analyze just those sets. They come out to almost 19,000 to 1 or 99.9946% confidence. You can easily see that in the middle (sets 10 to 148) you were producing a fairly high graph. There are many PSI experimenters that don’t get results any where near that level in hundreds of experiments.

MIND medical calculator and e consultation description

MIND medical calculator and e consultation descriptionInnovative medical calculator with differential diangosis stratification abilities!M.I.N.D. is Metabolic Irregularities Narrowning down Device. This is all-in one intelligent medical calculator, acid-base and electrolyte analyzer with "artificial intelligence" differential diagnosis capabilities (and stratification based on a diagnosis score). These results are presented realtime and a score is attributed to a suspected diagnosis:e.g. Low GFR (calculated) adds a point to renal failure, high LDH adds a point to hypothyroidism, High A-a gradient adds a point to PE. MIND medical calculator and e-consultation will also calculates anion gap, delta-delta, osmolar gap and integrates them to the acid base analysis and differential.Download it free and share our enthusiasm. It is a freeware (on its beta status, we are still developing it).We hope you will like it and use it daily! Please do send us your feedback and ideas at support@floeos.com in order to help us improving it. We believe that you will like it as much as we do! If you do, please feel free give it free to your friends!

Better watch your mouth. Technology is being tested that's designed to identify criminal intent by analyzing a person's voice.

Better watch your mouth. Technology is being tested that's designed to identify criminal intent by analyzing a person's voice. Insurance companies already are using it, and now law enforcement is checking out possible uses.
Nemesysco Ltd.'s layered-voice-analysis technology doesn't provide just the pass/fail results of a lie-detector test but can determine a person's willingness to speak on specific topics, their level of concentration, and even whether their thoughts come from memory or imagination. Law-enforcement agencies could use it for investigations, security clearances, controlling access to secured areas, intelligence-source questioning, and hostage negotiations, Nemesysco says.

The company completed a pilot test in November at Moscow's Domodedovo airport, where 500 passengers' voices were analyzed by a walk-through security system based on the technology. Nemesysco's GK1 voice analyzer, which costs up to $30,000, was used to help identify potential hijackers, drug smugglers, and other criminals.
Nemesysco developed its layered-voice-analysis technology with the goal of producing something more advanced than lie-detection technology, says Rich Parton, CEO of V LLC, Nemesysco's North American distributor. Unlike lie-detector tests, it doesn't determine stress levels to signal if a person is lying. "Nemesysco provides a psychological assessment of what's behind the response," he says.
Interrogators use a standard PC running Windows XP to collect data through a microphone; no equipment is attached to the person being questioned. Using the voice-analysis software, responses to questions are mapped numerically and visually, similar to the way an electrocardiogram measures and maps the electrical activity of a heartbeat. On a voice-analysis map, the bottom line indicates a person's willingness to speak on a subject, followed upward by lines that indicate level of concentration, thought patterns, emotions, the difference between what someone is thinking and what they say, and whether thoughts originate from memory or imagination, according to Nemesysco.
The company offers several products based on the technology, including a risk-assessment application and software for creating a person's "emotional signature" based upon analysis of a recorded conversation. Twenty insurance companies in the United Kingdom are using the risk-assessment component to defend against fraudulent claims, Parton says. Just another reason that crime, or even thinking about committing one, doesn't pay.

Access your Deeper Mind with this Amazing Unique Program!

Access your Deeper Mind with this Amazing Unique Program!
Magical Mind Analyzer is a DOS program that is a modified research program. It uses memory in an unconventional way. You should not use any other program with important data at the same time you are using "Magical Mind Analyzer". If you accidentally hit the windows key while using Magical Mind Analyzer and do not notice, who knows what keystrokes will go into what other window. So it's best to run "Magical Mind Analyzer" alone. It does work well in a DOS window if the memory properties are set large enough and you can avoid accidentally hitting the "Windows key". Because it is a modified research program, it lacks many of the things that you expect in a Windows program, yet can give astounding results!Be sure your keyboard is in a VERY comfortable position to allow you to finish a full graph. It's better to do a little at first to gradually strengthen your hands. The mouse does nothing in this program, you'll just need the keyboard.Using Magical Mind Analyzer really does allow you to recognize your magical mind! Enjoy! If you start to feel strange tapping the keys with others looking on, you can always say that it's a new kind of computer game ... The object is to figure out how to make the graph go high! That comes from your deeper mind!

New Stuff Here A Skin Analyzer??

Skin Analyzer
Tells You What Your Mirror and Best Friend Can't
Featuring advanced, proprietary technology, the Nu Skin ProDerm Skin Analyzer transforms the business of skin care with an experience so engaging, people will be lining up to take a closer look. The Nu Skin ProDerm Skin Analyzer takes a scientific approach to skin care, revealing what your mirror and best friend can't. Developed by combining the worlds of pattern recognition science, optical imaging, and dermatology, this portable tool provides an objective assessment of the skin.
See for yourself what the Nu Skin ProDerm Skin Analyzer can do for you and your business. There's never been a better skin care opportunity.


Here's how ProDerm works:
Step One: Using patented technology, this handheld tool captures a series of skin images.Step Two: Images are analyzed using proprietary software designed to measure key skin attributes.Step Three: ProDerm provides a visual assessment and recommends products guaranteed to improve your appearance.

Wow A Real Dream Analyzer

What do your dreams really mean? Unlock their secrets with Huge Magazine's new Dream Analyzer 2.0. Simply type in some facts about yourself and a brief description of your dream and you'll receive a quick response from our artificial intelligence coming out

Love Analyzer - The Love Meter

i was think are there any developers who has thought of building a site where people can analyze there love that would ber so cool

if they had one i would monitor mine

Many People Communicate Trough There Friends Network

Best personality Analysis
is just better to meet the indevidual in person
not just behind the computer
i have met people who have 1000s of friends but never actually met them in person
hwuhahahah that sucks... whehhehe

How would you analys her thoughts?

Whats is she thinking? whats on her mind
analys me?

Personality Analyzer

What are you thinking?

How to analyse peoples personality
how dow you do that you must be a sidekick
or a fortune teller to do that
im cant read peoples minds



no we are not talking about
network analyzer thats almost works the same
what is going on someones minds

what is a network analyzer? it is a simple and complicated devices that monitor any activity in the network

Analyzer is not a simple network sniffer. Here there is a brief summary of what it can do.
Network Sniffer Analyzer can capture (and display) packets on both the local machine and remote probes, thanks to the full support of the Remote Capture functionality of WinPcap.Additionally, one of the most valuable point is the ability to parse network packets according to the protocol description contained in external files, which can be modified at run-time by the user. These files are written in the new NetPDL language; for who is interested in that, please read the Protocol Dissectors Section. Advanced sniffing capabilities Due to the full support of the WinPcap remote capture capabilities, Analyzer is able to display packets currently being captured on another (remote) host. This can be done even if the remote host is behind a firewall, thanks to the support of the Active Mode remote capture. Additionally, Analyzer supports also sampling in order to reduce the amount of traffic generated by the remote host toward Analyzer. Sampling is available also when capturing from a local interface. End-to-end Reachability Monitor Analyzer can monitor the reachability (through a set of ICMP ECHO, aka PING, packets) of remote host, saving data into a database and making additional statistics. The user can later retrieve historical data to see how the reachability of some host changed over time. Additionally the user can set some alarm (e.g. "send an e-mail") in case of some event (e.g. "host down"). Local Network Host Monitor Analyzer can discover the presence of the active station on your local network and display their MAC, IPv4 and IPv6 addresses, and their canonical name.This module can monitor the availability of the stations and signal whether an host is up, is down, and so on. Furthermore, it can detect address spoofing (e.g. when the same IPv4/IPv6 address appears to bind more than one MAC addresses). Additionally the user can set some alarm (e.g. "send an e-mail") in case of some event (e.g. "possible spoofing"). Network Sessions Logger Analyzer can monitor the presence of TCP/UDP/ICMP "sessions" over the network, saving a database record for each session detected within a time frame. A summary of the session is then saved into a database for later processing. Network Data Mining Analyzer is able to apply Data Mining techniques to the database of the sessions, created with the Network Sessions Logger (NetLogger). This module is able to find some relevant relationships over the data which may be unexpected and it is able to give an insight about how the network looks like (e.g. which are the servers, which are the clients, and more). Furthermore, it can compare the relationships that come out from two different NetLogger databases and display the differences (e.g. a new server has been added to the network). Event Handling Analyzer has a module that manages events associated to the other modules and it executes the appropriate actions. The number of events and the actions associated to them are customizable by the user.

anyway back to the topic
how in the heck could you read peoples minds or how could you analize there toughts