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Masimo iSpO2 Pulse Oximeter (30 Pin Connector with Small Sensor for Apple iOS Device)

4.2 out of 5 stars 48 customer reviews
| 36 answered questions
About the Product
  • Uses hospital-grade Masimo SET pulse oximetry which measures oxygen saturation and pulse rate during movement and low blood flow to the finger
  • Provides the following parameters: Oxygen Saturation (SpO2), Pulse Rate (PR), Perfusion Index (PI)
  • Share up to 12 hours of measurement history via .csv file
  • Portable, lightweight and comes with a carrying case
  • Operates with Apple iOS (30 pin connector) devices


Product Description

Size: Small

Pulse oximeters measure light absorption in the finger to noninvasively monitor oxygen saturation and pulse rate. They are being increasingly used for general wellness and health applications including sports, fitness, and relaxation management. The iSpO2 pulse oximeter provides the following parameters: Oxygen Saturation (SpO2) is a measure of the oxygen saturation level in the arterial blood. Higher oxygen saturation indicates more oxygen in the arterial blood. Oxygen saturation can change due to a number of factors, including lung or heart function and altitude. Pulse Rate (PR) indicates the number of pulses per minute. This parameter is useful for assessing overall fitness as well as exertion levels at a particular moment in time. Perfusion Index (PI) is the ratio of the pulsatile blood flow to the nonpulsatile blood in peripheral tissue and is used to measure peripheral blood flow. A higher PI indicates higher blood flow. The iSpO2 quantifies key physiologic variables: in the morning, before or after exercise, at bedtime, or anytime you want to know if you are at your best. The Masimo Personal Health App coupled with your iSpO2 allows you to track and trend your measurements over time and share the data via email. The iSpO2 comes in six versions: small and large options for lightning and 30 pin connectors (iOS devices) and micro USB (Android devices). Masimo pulse oximeters are the leading brand in hospitals because they provide accurate measurements when other pulse oximeters fail by using a revolutionary invention called Signal Extraction Technology (SET), which measures through challenging conditions including movement and low blood flow. With iSpO2, the same high-performing Masimo SET technology is now available for general wellness and health applications.

Product Details

Size: Small
  • Product Dimensions: 34.2 x 1.2 x 1 inches ; 2.2 ounces
  • Shipping Weight: 8 ounces (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B00A1G7V1O
  • UPC: 843997007726
  • Item model number: ISPO2-3589
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (48 customer reviews)
  • Amazon Best Sellers Rank: #343,029 in Health & Personal Care (See Top 100 in Health & Personal Care)
  • Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By Kirk Shelley on December 30, 2012
Size: Large Verified Purchase
While expensive, this pulse oximeter is without doubt the best one available for the consumer market. Masimo uses impressive digital signal processing combined with proprietary LED technology. If you need a serious pulse oximeter, this is the one to get. I say this as someone who does extensive research using pulse oximeters. Note: I receive no funds or support from them and bought my iSpO2 retail from Amazon.
Kirk Shelley MD, PhD
Professor of Anesthesiology
Yale University
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By David on February 27, 2013
Size: Large
I have extensively evaluated the iSpO2 since purchasing one at CES in Las Vegas. I have found the unit to extremely accurate under normal conditions at rest with the finger probe on a stationary hand. I have compared my iSpO2 with units from my various surgery centers including Welch Allen and Masimo and found close correlation. I found that the surgical units respond slightly quicker to decreased pO2 associated with breath holding but overall my IspO2 was very close. The only downfall has been on my stair master on the highest level. The movement associated with the stair climbing action confuses the pO2 sensor. Despite the movement, the heart rate remains accurate and correlates well with my Polar strap. Overall I have found the quality of the iSpO2 to be excellent and the data extremely useful. I continue to use and evaluate the iSpO2 frequently. As a surgeon and avid fitness enthusiast I have really enjoyed the iSpO2. I have found the iSpO2 to be very well constructed, and accurate. As an aside, I as a surgeon rarely look at the brands of the anesthesia equipment in the OR. When I returned from Las Vegas, I asked my anesthesiologists about Masimo and learned that company is the industry leader with fantastic technology. This product is as I would expect from such a company.
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Size: Large Verified Purchase
This is a fine, if expensive, device. I use it with my iPhone 4 and the battery does not last overnight. The problem, essentially, is that it samples every second and this is too much for an iPhone 4 battery. I contacted Massimo and asked if an option existed to change the sampling rate to three, four, or five seconds. Cutting the sampling rate would solve two problems, battery life, and the massive CSV file generated from an overnight use. Apparently they're working on that, but there is no timetable. In order to use this massive file (about 25,000 lines for a full night) the first thing I have to do, after importing it into Excel, is delete two thirds or more of the data. Being able to change the sampling rate to every three or four seconds would eliminate all of this bother.
My interim battery life solution was to buy a 30 pin extender that also allows plugging in a mini USB connector from the side of the extender for charging the battery while using the 30 pin connector for the oximeter. This is a little bit clumsy but workable. Masimo literature says not to connect any charger while using the oximeter, but, according to technical support, this is only because of legal concern that somehow a user might get an electrical shock from a defective iPhone power supply sending 120v back into the iPhone and then out to the oximeter, where somehow the user might get shocked. Go figure! According to technical support, there is no risk of damage to the oximeter if a charger is connected to the iPhone while using the oximeter.
Sensitivity and repeatability are excellent, and I assume that accuracy is equivalent. On nights that I have used my CPAP, readings are consistently about 2% higher than on nights when I use my oral appliance, And this 2% difference correlates with how I feel in the morning. Now, the big question is, does this difference correlate to long-term differences in overall health.
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Size: Large Verified Purchase
I am a physician, but NOT a pulmonologist and my interest in the device was for Sleep Apnea monitoring overnight not exercise testing. I have also tried the iChoice Pulse Oximeter which is about $50 cheaper. Based on my limited experience in the hospital setting & with these other consumer units I would say that the basic finger construction of detecting your pulse & O2 sat are not dramatically different going from the cheaper to the more expensive price range. I sincerely doubt that the thing would get stable readings if you use it while exercising, but at rest its probably as good as any heart belt. I think that is true for any product that measures pulse and O2 sat in this manner (they just don't stay on the finger that well & while everyone uses the finger its a peripheral body part about as far away from the heart as possible). If you attempt to use this product with the idea that during exercise you might see a drop in your O2 sat, I think you might be sorely disappointed. Anyone in half decent shape will find it almost impossible to hold your breath or exercise so hard that you can actually see a meaningful drop (below 90%) in your O2 sat. I'm not sure how meaningful the numbers are between 92-99% as you will quickly find when leaving the unit on for a long time the readings will bounce around all of these numbers without obvious biological change on your part.

Here are the positives. The unit has a longer cord than the iChoice (great for moving around and keeping the phone further away), the construction appears to be sturdier, and the one cable design (as opposed to iChoice 2 pieces fit together) makes for a more stable device. The software measures PI (which is an index of how good the reading is) and shows the wave form (which probably to most people means very little).
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