Evaluation: Medtronic Kendall SCD 700 Intermittent Pneumatic Compression System for DVT Prevention

• The SCD 700 series controller is the pump that inflates the bladders within the attached garment(s). The pump adjusts the pressure in the attached garments throughout the compression cycles.
• The controller has a battery-status LED display on the face itself (not on the display screen). The display consists of a battery icon with three bars to indicate battery life, plus an LED icon to indicate charging. Each bar in the battery icon represents about a third of the total battery life. When less than 34% battery charge remains, only one of the bars will be lit (green). As the battery depletes further, this bar will change to amber, and then to red when there is less than 15 minutes remaining.
• The controller has four physical buttons—the power button, an arrow button, an "A" button, and a "B" button.
  • The power button turns on the system. A green LED shows that the controller is on. Powering on the system will automatically begin a pressure cycle.
  • The arrow button is used to access the "Compliance Meter" screen further explained below.
  • The "A" and "B" buttons are used to confirm settings on the system or used to navigate the "Compliance Meter" screen.
• Vascular Refill Detection
  • Medtronic's Vascular Refill Detection is an automatic feature that adjusts cycle time based on the time it takes for a patient's veins to refill after compression.
  • This is done after the system reaches its target pressure and then again every 30 minutes. The cycle time may range from 20 to 60 seconds for a single garment.
  • When two garments are in use, the longer refill time will be used for both garments.
• Controller dimensions are 196 × 173 × 185 mm (7.7 × 6.8 × 7.3 in). The specified weight is 2.3 kg (5.0 lb).

• The screen that is displayed automatically, which is divided in half (sides A and B) with one leg displayed on each side. When one or more garments are connected to the A and/or B ports on the back of the controller, a garment icon will appear on the corresponding leg(s) on the display, either as a foot cuff or as a leg sleeve garment depending on the type of garment in use. There is only one leg garment icon for all lengths of leg garments.
• The "Compliance Meter" screen, which displays how long the pump has been running as an indication of the length of time a patient has been receiving treatment. This can be accessed with the physical arrow button on the controller.
  • Within the "Compliance Meter" screen, users can reset the meter for a new patient or change the time over which compliance is being assessed.
  • The meter displays two numbers, one on top of the other, showing the cumulative time that the system has been in operation (top number) over a selected time period (bottom number). This tells the clinician, for example, that the patient has been receiving therapy for 17 hours out of the past 24 hours. The bottom number defaults to the time since the meter was last reset, which should be indicative of the time since a patient began receiving therapy. However, users can also set this to 8, 10, 12, or 24 hours to see the amount of therapy a patient has received in the previous shift, day, etc.
• Alarms or alerts that come up often take over the entire display, especially when they result in a stop in treatment.

Garments

• Garments for DVT prevention wrap around a part of the patient's anatomy and inflate/deflate in cycles to promote blood flow. The Kendall SCD Comfort garments and Express (economy) garments are all intended for single use.
• The SCD 700 system is available with garments that cover three different application sites—the feet, the calf (called Knee Length by Medtronic), and full leg (called Thigh Length by Medtronic). The calf- and full-leg-style garments, referred to collectively as leg garments hereafter, are available in a single inflation style that Medtronic calls "sequential."
  • Based on ECRI Institute's classification scheme, all of Medtronic's leg garments would be categorized as gradient, sequential. (That is, bladders inflate in sequence beginning with the most distal and ending with the most proximal, and the highest pressure is found at the distal end of the garment and the lowest pressure at the proximal end. For descriptions of the various inflation styles used by IPC devices, see our Evaluation Background on this technology. )
  • The table below lists the garments available with the SCD 700 system. Note that our testing was done only on the Kendall SCD Comfort leg sleeve garments and the Express foot cuff garments (not the Express leg sleeve garments).

Garments Available with the Kendall SCD 700 System​ ​ ​ ​ ​ Code Type Application Site Compression Type (ECRI Institute Classification) Size Target Pressures (Factory Default) 74010 Comfort Sleeve Thigh Length Gradient, Sequential Up to 40.6 cm (16 in) 45 mm Hg 74011 Comfort Sleeve Thigh Length Gradient, Sequential Up to 55.9 cm (22 in) 45 mm Hg 74012 Comfort Sleeve Thigh Length Gradient, Sequential Up to 71.1 cm (29 in) 45 mm Hg 74013 Comfort Sleeve Thigh Length Gradient, Sequential Up to 91.4 cm (36 in) 45 mm Hg 74021 Comfort Sleeve Knee Length Gradient, Sequential Up to 35.5 cm (14 in) 45 mm Hg 74022 Comfort Sleeve Knee Length Gradient, Sequential Up to 53.3 cm (21 in) 45 mm Hg 74023 Comfort Sleeve Knee Length Gradient, Sequential Up to 66.0 cm (26 in) 45 mm Hg 74041 Comfort Tear-Away Thigh Length Gradient, Sequential Up to 55.9 cm (22 in) 45 mm Hg 74042 Comfort Tear-Away Thigh Length Gradient, Sequential Up to 71.1 cm (28 in) 45 mm Hg 74043 Comfort Tear-Away Thigh Length Gradient, Sequential Up to 91.4 cm (36 in) 45 mm Hg 5897 Express Foot Cuff Foot Foot Up to U.S. size 9 130 mm Hg 5898 Express Foot Cuff Foot Foot Above U.S. size 9 130 mm Hg 73032 Express Foot Cuff Foot Foot Up to U.S. size 9 130 mm Hg 73033 Express Foot Cuff Foot Foot Above U.S. size 9 130 mm Hg 9529 Express Sleeve Knee Length Gradient, Sequential Up to 53.3 cm (21 in) 45 mm Hg 9530 Express Sleeve Thigh Length Gradient, Sequential Up to 71.1 cm (29 in) 45 mm Hg 9545 Express Sleeve Thigh Length Gradient, Sequential Up to 55.9 cm (22 in) 45 mm Hg 9736 Express Sleeve Thigh Length Gradient, Sequential Information not available 45 mm Hg 9780 Express Sleeve Thigh Length Gradient, Sequential Up to 91.4 cm (36 in) 45 mm Hg 9789 Express Sleeve Knee Length Gradient, Sequential Up to 66.0 cm (26 in) 45 mm Hg 9790 Express Sleeve Knee Length Gradient, Sequential Information not available 45 mm Hg 73011 Express Sleeve Thigh Length Gradient, Sequential Up to 55.9 cm (22 in) 45 mm Hg 73012 Express Sleeve Thigh Length Gradient, Sequential Up to 71.1 cm (29 in) 45 mm Hg 73013 Express Sleeve Thigh Length Gradient, Sequential Up to 91.4 cm (36 in) 45 mm Hg 73022 Express Sleeve Knee Length Gradient, Sequential Up to 53.3 cm (21 in) 45 mm Hg 73023 Express Sleeve Knee Length Gradient, Sequential Up to 66.0 cm (26 in) 45 mm Hg 9530T Express Tear-Away Thigh Length Gradient, Sequential Up to 71.1 cm (29 in) 45 mm Hg 9545T Express Tear-Away Thigh Length Gradient, Sequential Up to 55.9 cm (22 in) 45 mm Hg 9780T Express Tear-Away Thigh Length Gradient, Sequential Up to 91.4 cm (36 in) 45 mm Hg 73041 Express Tear-Away Thigh Length Gradient, Sequential Up to 55.9 cm (22 in) 45 mm Hg 73042 Express Tear-Away Thigh Length Gradient, Sequential Up to 71.1 cm (29 in) 45 mm Hg 73043 Express Tear-Away Thigh Length Gradient, Sequential...