I’m at GlobeStar System’s annual user group meeting this week, in Lisbon, Portugal. Attendance is about 150, equivalent to last year’s meeting.
The messaging middleware market is transitioning from middleware to an enterprise application. GlobeStar has been in the business just over 10 years. Unlike Emergin, who started in paging messaging, GlobeStar got their start in the 1990s integrating Austco nurse call and Nortel’s Companion (the first wireless phone system in North America). Over the years, the company (and the market) have evolved from a single nurse call/phone integration to a platform supporting many different systems and devices both on the input and output sides — and incorporating workflow automation through rules, alert initiation, and escalation.
The conference kicked off with introductory presentations from David Tavares, CEO of GlobeStar; Dr Teresa Sustelo, President of Centro Hospitalar de Lisboa Central (a large multi hospital system); and Dr Miguel Correia, Regional Secretary of Health, Azores. During his opening remarks, Miguel Correia noted the broad applicability of improved messaging. He spoke to the extension of messaging systems to tracking and eventually orchestrating complext processes and tasks. This is a vital requirement in health care delivery.
GlobeStar’s technology has been applied outside health care too. They monitor automobile painting production lines and “man down” systems in mining. Miguel Correia mentioned that they’re using ConnexAll in CO2 monitoring at volcanos in the Azorres. Now they’re moving further into workflow automation.
My keynote presentation theme was, “everything is connected” and contrasted this with provider’s tendency to only focus on the immediate problem — or what they think is the problem.
Putting the health care IT market aside, the point of care market is divided into 6 separate market segments: wireless phones, patient flow applications, medical device connectivity, messaging middleware, nurse call, and real time location systems (RTLS), not to be confused with indoor positioning system infrastructure vendors like Sonitor and CenTrak. For some time, buyer’s haven’t been able to buy a product from one of these segments without impacting one or more of the others. Connections to medical devices, and the nurse-to-patient assignment process are common points of contention.Read More
The crew from Lehigh Valley presented their experience creating a telemedicine system called aICU (advanced ICU). John Sokalsky lead off, describing how their aICU concept leverages intensivists and critical care nurses in a remote location to serve more ICU patients. The system improves outcomes and reduces costs – always good things. This system integrated their CPOE, meds administration, real-time documentation charting and medical device data via a critical care information system, and finally a camera/digital video system. The strategic initiative was to create and implement an off-site “tele-intensivist” program. This program provides round-the-clock intensivist coverage of critical care units throughout their health care system. Results showed improved patient outcomes and reduced overall costs by managing changes in patient conditions quickly and effectively.
The project was lead by Stephen Matchett, MD, Chair, and Project Sponsor, and included the following team members:
- I/S Applications and Administration
- Clinical Services Administration and leadership
- Respiratory Therapy
- Administrative Planning
- Clinical Engineering
- Others invited on as needed basis
The Lehigh Valley system is based on an application from iMDsoft. Device drivers for legacy devices (or devices that do not include connectivity) use serial device drivers written by iMDsoft. Patient context for devices with serial interfaces was done by bed location. [This works fine for an ICU implementation where patients rarely move - connectivity on devices connected to lower acuity patients should establish patient context in the device.] Data was received from devices with built in connectivity (via integrated network support) via HL7 from the device vendor’s HL7 server.
They use HP OpenView to monitor device connectivity as far as the Lantronix terminal server for serial-based devices. Devices with network connections can be monitored by OpenView up to the medical device vendor’s server. The links between the device and the next step (term server or device vendor’s server) is not visible to IT for monitoring. They usually get warning from biomedical engineering when new devices or firm ware upgrades, and test in advance of deployment.
An interesting part of their description of the project includes a test environment. During deployment, this environment was a “simulated ICU” that includes back to back TNICU/MICU beds in test, and four additional beds at remote ends of the ICU. Beds were added until the first twenty eight ICU beds were online. This required continuous coordination with Facilities and Bed Management. As the first 28 bed unit prepared to go live, additional units were subsequently wired & placed in test. This approach offered the following advantages: facilitation of training by department prior to “go live,” and identification and correction of system, device and workflow issues. Once fully deployed, they use spare devices (they’re usually available) to create a test environment as needed.
Surprisingly, they’ve had problems with some vendors getting the data required to develop a serial port device driver.
Christina Roberts, on the IT side, talked about the nursing and clinical engineering relationship. At Lehigh Valley, the IT department facilitates the coordination between nursing and biomedical engineering. The IT department takes calls 24×7 and provides tier 1 support for the aICU (and other clinical information systems). Depending on the problem, they will call biomedical engineering.Read More
First up after lunch, “A Prescription for Wireless Anxiety,” presented by Scott Bradley of Draeger and Dave Hoglund with Andrew Corp. Scott related his experience on wireless and risk management at Draeger, especially a market study that Drager underwrote this year. For some time, a major portion of their product strategy has been based on the belief that, “the ease of integration of devices with existing health care systems and network infrastructure will be the driving factor determining which devices are adopted and used on these wireless LANs.” Here are some additional findings:
- Multi-functional purpose of networks is accelerating growth of wireless LANs
- Wireless network priorities: Robust security, Upgrading to 802.11g, Reliability and Quality of Service (QoS)
- IT Department will “own” shared networks
- Regulatory certification with specific network hardware
- “Wireless LAN best-practices” need to be supported by vendors
- Device companies need to invest in keeping products current
- New support issues result from shared networks
- Integrating products with untested, existing hospital networks
New requirements make deploying medical devices on shared networks, specifically the need to simplify implementation and testing of devices on common network infrastructure through industry-wide best practice. Device vendors need to use device design and development strategies to accelerate new standards and new customer network requirements.
Scott referred to the recent FDA draft guidance on wireless medical devices. Specifically, “FDA believes the more critical the medical device function and information passed via RF technology, the more important it is the wireless connection be robust.” He suggests that ISO 14971 is a great risk management tool for wireless medical devices. Vendors with wireless medical devices should also refer to IEEE 802.15.2 for coexistence risk management and mitigation, and IEC 60601-1-2:2001 describes in detail testing for unintentional electro magnetic interference – the latest draft of this standard is intended for vendors and users. Users are increasingly falling under standards like this because it is only in actual use that certain factors like interference are ultimately experienced and resolved. The draft IEC 80001 is another standard for both vendors and end users, that describes standards for the deployment and support of medical devices in a network – this standard also includes a risk management process.
Next up is Dave Hoglund, representing Andrew Corporation. Dave started with a survey of the many wireless technologies deployed in hospitals. Hospitals are the worst “Multi-Path”environment due age of construction of hospitals and the variety of construction materials and methods. Nothing is standard! Dave’s presentation also includes a lot of great reference data on wireless interference, power levels and other technical issues. Dave touched on the perennial hot issue for biomeds, cell phones in hospitals, suggesting the risk is overblown in consideration to the value derived from cellular technology.
Best practices were suggested:
- Perform an initial RF survey
- Perform periodic RF update surveys
- Establish, publish and enforce a “spectrum policy”
An industry issue that Dave mentioned was the indirect distribution channel that network vendors use. Buyers must not only select the best network vendor, but they are also highly dependent on the ability of their VAR (value added reseller) who actually sells, designs and installs the network. Another key point is the importance of having your own tools and using them. In fact, hospitals should have multiple tools in some cases because they do things in different ways, providing a more complete picture of your RF environment.
Questions – bandwidth consumption of wireless medical devices on an 802.11 wireless LAN? 10-20 kilobits per second – relatively low bandwidth utilization, but sensitive to latency.
Question inspired by experience with a smart pump vendor who released their product with only one kind of encryption – not the kind used by the hospital. The vendor took 9 months to reverify and revalidate their product using the new encryption method. Takeaway: vendors need to provide sufficient flexibility and choices so they can conform to customer’s network environment.
Suggestion from audience that Biomed could assume responsibility for the wireless LAN. The past approach has been reactive, and the big point of the presentation is to be proactive. Of course, wireless LANs can be monitored from any department or location – even more than one.
Another suggestion is for medical device vendors formulate best practices and submit them to wireless LAN vendors, so they can address new requirements in future versions of the product, and can train their VARs on device vendor’s best practices.
The last session of the day was Managing your Wireless Spectrum: Realizing Your Full Potential,” presented by Dave Hoglund. In this presentation Dave got deeper into RF best practices. Before you can talk about managing, you have to know what it is you’re going to manage. As new wireless applications are adopted – wireless VoIP, patient monitors, alarm notification, point of care barcoding, etc., you must reevaluate your network design – and may need to redesign your network. Dave reviewed wireless technologies with emphasis on things seeing increasing adoption like ZigBee, cell phones and distributed antenna systems (Mobile Access, InnerWireless, Andrew). After a review of unique challenges and requirements for the hospital RF environment, Dave launched in to best practices. The underlying theme here is being proactive.
Another area of focus includes the tools that are used to monitor and manage RF environments. Dave described the basic requirements for a network operations center that would provide planning, monitoring, and trouble resolution for the RF side of networking.
Questions: RF monitoring that extends down to 402 MHz MICS band. Recommendations have been made to Cognio to extend the RF monitoring range of their system. The larger wireless LAN vendors will be building this monitoring capability into their APs.
An IT department trash talked wireless medical devices because their 802.11b radios would pull down the speed of 802.11g clients already on the network. This is true for older APs, but all the current APs support independent speeds for 802.11a and 802.11g clients on the same AP at the same time.
Can you do a lower cost abbreviated site survey with single channel wireless LAN vendors (like Meru or Extricom) or should you do a complete site survey. The recommendation is to do a full RF site survey that covers all the RF spectrum that is in use in a hospital. Consequently, a single channel infrastructure may not result in a lower cost site survey.Read More