A Planning Playbook for Opening a New Orthopedic ASC
The ASC market continues its rapid growth. In 2023, roughly 116 new ASCs opened in the U.S., many of which were orthopedic-specific in nature....
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By: Barry Friedberg
Published: 10/10/2007
Perhaps no other advance in patient monitoring has been as important in recent years as the pulse oximeter. Although it took several years for pulse oximetry to become a standard of care, there's no mistaking its role in decreasing the mortality rates associated with brain damage and death from hypoxemia. Read on if you're thinking of buying a pulse oximeter.
ABCs of pulse oximetry
Pulse oximetry is a non-invasive method that lets you monitor the oxygen saturation level of a patient's blood (SpO2). Simply put, if there isn't enough oxygen in a patient's blood, brain damage can occur. Before pulse oximetry, the only way to diagnose if a patient had enough oxygen in his blood was to perform a blood gas, which took a lab a minimum of 20 to 30 minutes, a problem for hypoxic patients.
Not long ago, cyanosis (a bluish coloration of the skin due to the presence of deoxygenated blood) was the surest way to determine if a patient's oxygen saturation was too low. There's no need to wait this long anymore, as you're alerted visually (on the monitor) and audibly (by alarms) to the slightest drop in blood oxygen saturation level. ORs especially have become much safer with patients under anesthesia being monitored non-invasively and potential problems being diagnosed and solved early on.
How does a pulse oximeter work?
A pulse oximeter includes some form of visual display and a sensor that's usually placed on the finger or toe of a patient. The sensor has a pair of small light-emitting diodes (better known as LEDs) facing a photodiode. Light passes from one LED, which is red (660nm), to another, which is infrared (940 nm). Changing absorbance of each of the two wavelengths is measured, allowing determination of the absorbances due to the pulsing arterial blood and factoring out venous blood, skin, bone, muscle, fat - even fingernail polish.
Based on the ratio of changing absorbances that the red and infrared light cause by the difference in color between oxygen-bound (bright red) and unbound (dark red or, in severe cases, blue) hemoglobin in the blood, a measure of oxygenation can be made. The measure is converted into a percentage that's then displayed on the monitor, usually along with the heart rate. Acceptable normal SpO2 ranges are from 95 to 100 percent. Anything below 90 percent is cause for concern.
Benefits far outweigh the limitations
Pulse oximeters have come a long way since they debuted in the early 1980s. Back then, we tolerated the new technology's performance flaws. Patient motion, low perfusion, tissue distortion and signal interference could make SpO2 estimates less reliable and more prone to generating false alarms. Today pulse oximeters are much more advanced and accurate. Still, they're not without their limitations. For example:
Despite these few limitations, pulse oximeters let us treat patients more promptly and effectively in the OR. To get the most out of your pulse oximeter purchase, you'll want to keep these factors in mind.
Canary in a coal mine
In essence, the pulse oximeter acts as a canary in the coal mine in that it alerts you when something is wrong and allows for early intervention if the patient's oxygen saturation is too low.
CAS Medical Systems
750 Vital Signs Monitor
(800) 227-4414
www.casmed.com
Price: $4,000 to $7,000
FYI: Casmed 750 Vital Signs Monitor is designed for procedural sedation, says the company. The 750 utilizes best-in-class technology such as Masimo SET pulse oximetry and Oridion Microstream EtCO2 technology. A compact, mobile unit, the 750 can operate on emergency vehicle power, direct AC or battery, says Casmed.
ConMed Corporation
PRO2 Pulse Reflectance Oximeter
(800) 765-8375 x-3140
www.conmed.com
Price: $4,995 to $7,600
FYI: The first monitor designed as a true reflectance oximeter system, the PRO2 sensor employs three light emitters (one red, two infrared) and two light detectors that surround the emitters and are sized to capture from equal surface areas, says ConMed. You can use the PRO2 on the patient's back or forehead, which results in faster response time and more reliable data than standard transmission or reflectance oximetry systems, adds ConMed.
Criticare Systems
504DX Portable
Pulse Oximeter
(800) 458-4615
www.csjusa.com
Price: $1,595 (with printer) $1,195 (without printer)
FYI: The ergonomically designed 504DX Portable Pulse Oximeter is compact, lightweight and offers advanced DOX pulse oximetry and heart rate monitoring, says the company. The device features audible and visual alarms. The optional fully integrated internal printer produces high quality hard copies of graphic trends, tabular trends and sleep summary reports, says Criticare. Unique DOX digital SpO2 technology improves performance, even under the most challenging clinical conditions, adds the company.
Draeger Medical Systems
Infinity Masimo SET SpO2 SmartPod
(800) 437-2437
www.draeger.com
Price: Not disclosed
FYI: Draeger's Infinity Masimo SET SpO2 SmartPod brings the advantages of Masimo's gold standard pulse oximetry technology and sensors to Infinity patient monitors, says Draeger. Masimo Signal Extraction Technology read-through motion and low perfusion pulse oximetry is accurate during low perfusion and most types of patient movement - helping to reduce false alarms and detect true alarms, adds the company.
DRE Medical Equipment
BCI 3401 FingerPrint Pulse Oximeter
(800) 477-2006
www.dremed.com
Price: Not disclosed
FYI: DRE Medical's FingerPrint handheld pulse oximeter puts comprehensive spot-checking capability conveniently and comfortably in the palm of your hand, says the company. This low-cost, easy-to-use solution features robust memory and an integrated printer for immediate hard-copy documentation of real-time or trended data for patients ranging from neonate to adult, adds DRE.
Masimo Corporation
Masimo Radical-7
(949) 297-7498
www.masimo.com
Price: Not disclosed
FYI: The Masimo Radical-7 is the first bedside monitor to feature Masimo Rainbow SET, the first and only technology platform capable of continuously and non-invasively measuring carboxyhemoglobin (SpCO) and methemoglobin (SpMet) in addition to oxyhemoglobin (SpO2), perfusion index, pleth variability index and pulse rate, says the company. The product lets clinicians continually measure levels of SpCO and SpMet and accurately determine patients' true oxygenation status, adds Masimo.
Nellcor/Tyco Healthcare
OxiMax N-600 Pulse Oximeter
(800) NELLCOR
www.nellcor.com
Price: $4,500
FYI: Nellcor's OxiMax N-600 pulse oximeter, along with other OxiMax standalone and handheld oximeters, lets you confidently monitor even the most critically ill patients, says the company. Most leading patient monitors come with OxiMax options, making them compatible with the broad spectrum of OxiMax sensors, including the Max-Fast forehead sensor, which offers better performance in low perfusion, adds Nellcor/Tyco.
Omron Colin Medical Corp.
Press-Mate Prodigy II
(800) 829-NIBP
www.colinmedical.com
Price: $2,995 to $5,395
FYI: Omron Colin's Press-Mate Prodigy II non-invasive blood pressure (NIBP) monitors offer accuracy and flexibility, according to the company. In addition to Colin's patented NIBP with Smart Inflation and Dynamic Linear Cuff Deflation, the Press-Mate Prodigy II is available with optional SpO2 and 7-Second E-Temp. Some of the product's advanced features include user-designed cuff interval programs, patient ID and memory.
Smiths Medical PM, Inc.
BCI 3301 Hand-Held Pulse Oximeter
(800) 558-2345
www.smiths-medical.com
Price: $595
FYI: Smith Medical's BCI 3301 Hand Held Pulse Oximeter is a cost-effective, portable pulse oximetry monitoring system compatible with personal computers or commercially available printers, says the company. Designed for simple, accurate spot-checking, it is ideal for use during emergency transport, in emergency rooms, outpatient clinics or for home care. It provides fast, reliable SpO2 and pulse rate measurements on any patient from neonate to adult, adds Smiths Medical.
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