SCD RESPONSE™ Compression System Controller

The SCD RESPONSE™ Compression System is a clinically-proven modality for the prevention of Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE). The system consists of the SCD RESPONSE™ controller, non-disposable tubing and single-patient use leg garments. The compression sleeve contains three bladders to deliver circumferential, sequential and gradient compression to ensure clearance of the deep veins without the risk of distal blood trapping. The sleeve is anatomically designed with adjustable sleeve closure offering a customized fit for each patient. The sleeve is available in thigh or knee length and packaged in pairs.

Order Information

Order CodeDescriptionShip Case
7325SCD RESPONSE™ Compression System Controller1

Features and Benefits

SCD RESPONSE™ Compression System Controller

FeaturesBenefits
Clinically-Proven Prophylaxis in over thirty (30) peer-reviewed, published studies.Provides proven efficacy in the prevention of Deep Vein Thrombosis (DVT) & Pulmonary Embolism (PE).
Operates with clinically-proven sequential, gradient, circumferential compression parameters (45mmHg in the ankle, 40mmHg in the calf and 30mmHg in the thigh.)Delivers proven prophylaxis to the at-risk patient.
Vascular Refill DetectionMoves a greater VOLUME of BLOOD over time, minimizing stasis. Customizes the compression cycle, moving blood from the lower extremities as soon as possible, as often as necessary. No nursing intervention is required to operate. Ensures continual monitoring of a patient's venous refill status.
One Touch OperationThe system is fully automated and therefore easy to use. Just turn the system on and it is ready for use.
Automatic Pressure AdjustmentEnsures that all patients receive the clinically proven compression parameters regardless of how the garment is applied.
Audible and Visual Alarms & Troubleshooting GuideAudible and Visual alarms alert the clinician to a system fault. Attached Troubleshooting Guide provides instructions for resolving alarm issues.
Comfort CoolingProvides air movement between patient's limb and the disposable sleeve for improved patient comfort.
Inflate & Assess IndicatorsAllow clinician to easily monitor patient's status.
Small Footprint Easy to transport. Less space needed for storage.
Light WeightEasy to transport and maneuver.
Integrated Bed MountPump conveniently hangs on front, side, or foot of bed, versus sitting in the bed with the patient. Pump is securely affixed to the bed, versus dangling from straps that are used as hangers.
Integrated HandleAllows for convenient carrying of pump.
Hospital Grade Power Cord, with Grounded 3-prong plugHeavy grade cord protects electrical connection from abuse and excessive wear and tear. Three-prong plug ensures proper electrical grounding.
Rounded Edges and Sleek DesignEasy to clean surfaces.
Removable Fan FilterEasy to clean and maintain controller function.
Kink-Resistant TubingKink resistance makes the tubing easy to use and manipulate.

Frequently Asked Questions

QuestionAnswer
WHAT TYPES OF ALARMS WILL INDICATE A SITUATION WHERE THE CONTROLLER IS NOT OPERATING PROPERLY?The SCD RESPONSE™ Compression System controller has both audible and visual alarms to notify the nurse of any situation where the unit is not operating properly.
WHAT OPERATION FAILURES WILL THE ALARMS INDICATE?The following alarm codes will be shown in the display screen to indicate a failure: SL – Pressure has fallen below 8mmHg. LO – Pressure has fallen below 43mmHg for five consecutive cycles. SH – Pressure has exceeded 90mmHg D5 – Pressure has exceeded 90mmHg HI – Pressure has exceeded 47mmHg for five consecutive cycles SP – Pressure has not been controlled to 35-55mmHg for 12 consecutive cycles D1-4 – System requires service D6-9 – System requires service
HOW DO I RESOLVE THE ERROR AND RETURN TO NORMAL OPERATION?Each SCD RESPONSE™ Controller has a Troubleshooting Guide affixed to the top of the unit. Most error codes are resolved by turning off the controller and adjusting the fit of the sleeve. More detailed steps are provided on the Troubleshooting Guide. SL – Pressure has fallen below 8mmHg. (Reattach loose tubing and turn the system off an on) LO – Pressure has fallen below 43mmHg for five consecutive cycles. (Reattach loose tubing and/or tighten sleeves so that two fingers fit snugly between the sleeve and the patient’s leg. Turn the system off an on.) SH – Pressure has exceeded 90mmHg (Straighten the kinked tubing and turn the system off an on.) D5 – Pressure has exceeded 90mmHg (Straighten the kinked tubing and turn the system off an on. If the tubing is not kink, the unit requires service) HI – Pressure has exceeded 47mmHg for five consecutive cycles (Loosen sleeves so that two fingers fit snugly between the sleeve and the patient’s leg. Turn the system off an on.) SP – Pressure has not been controlled to 35-55mmHg for 12 consecutive cycles (Loosen sleeves so that two fingers fit snugly between sleeve and patient’s leg. Turn the system off an on.) D1-4 – System requires service (Return the unit to the Bio-Med Department) D6-9 – System requires service (Return the unit to the Bio-Med Department)
HOW DO I CLEAN THE SCD RESPONSE™ CONTROLLER?The controller cabinet can be cleaned as necessary with a soft cloth dampened with water. If necessary, a mild disinfectant and/or detergent can be used; excess fluid should be avoided. The controller should be wiped with a clean, dry cloth afterward. Do not immerse in water. Do not use products containing ammonium chloride, or acetone, as those chemical will degrade the integrity of the case. The SCD RESPONSE™ Compression System controller cannot be effectively sterilized by liquid immersion, autoclaving or ETO sterilization, as irreparable damage to the system will occur.
WHAT IS VASCULAR REFILL DETECTION? Vascular Refill Detection is a term used to describe the method the SCD RESPONSE™ Compression System uses to measure the time it takes for the venous system of the patient’s legs to refill with blood after being compressed by the SCD™ sleeves. This time is measured by using a technique similar to air plethysmography (pleth-iz-'mäg-ra-fe) to detect the change in girth of the lower legs after being compressed (while the blood is refilling, making them larger) until it stops changing, indicating that the legs are refilled. This time is then used as the basis for the timing between compressions for subsequent cycles. The time is re-measured every 30 cycles.
WHY DID KENDALL DEVELOP VASCULAR REFILL DETECTION?It is understood that blood takes a certain period of time to effectively refill the venous system after a compression cycle. This time will vary from patient to patient as proven by Dr. Nicolaides. Ideally, the venous refill time would be measured, and the next compression cycle would start once the veins are refilled. This would allow for more compression cycles over time, move more blood, and further reduce venous stasis. Fortunately with Vascular Refill Detection, we now have the ability to measure venous refill and automatically adjust the cycle times accordingly.
HOW DOES THE SCD RESPONSE™ COMPRESSION SYSTEM WITH VASCULAR REFILL DETECTION WORK?After the normal 11-second compression cycle compresses the patient’s leg, the venous refill time will be determined during the vent portion of the cycle. At the end of compression, the ankle and thigh bladders will completely deflate while the calf chamber is deflated until the pressure falls to 6mmHg (enough pressure to cause the bladder to remain in contact with the leg) and then held. The pressure in the calf bladder is then monitored for the next 60 seconds to evaluate changes in the girth of the calf. The point at which the pressure reaches a plateau (the pressure has not risen more than 0.20mmHg for 10 seconds) is considered the point at which the venous system in the legs has refilled. However, if the plateau is reached in less than 20 seconds after compression is applied, 20 seconds will be used as the vent time for subsequent cycles. Likewise, if a plateau has not been found within the sixty second measurement period, 60 seconds will be used as the subsequent vent time. The venous refill time determination will be made after the microprocessor has successfully achieved 45mmHg pressure at the ankle (typically 2-3 cycles). The system will then re-evaluate the refill time every thirty cycles to reset the cycle time, if needed, to accommodate movement or changes in the patient's position.
WHAT IS VENOUS REFILL TIME? Venous refill time is a term used to denote the time it takes for the venous system of the legs to refill with blood after being compressed or manipulated in a certain manner.
WHAT IS AIR PLETHYSMOGRAPHY (APG)? Air plethysmography (APG) was first used in the early 1960s to study relative volume changes in the lower limb in response to postural alterations and muscular exercise. In recent years, it has been widely used as a non-invasive method to evaluate patients with chronic venous insufficiency and to assess calf pump function and venous reflux. It consists of a large air bladder inflated to low pressures (approximately 6mmHg) around the patient’s calf. This low pressure insures adequate contact between the air bladder and the limb while causing minimal compression of the veins. The changes in pressure, resulting from the changes in calf girth, are detected. The relationships of these pressures (rate, max, and min) are used in the diagnosis of the patient.
DO I NEED TO USE SPECIAL SCD™ SLEEVES IN ORDER TO UTILIZE VASCULAR REFILL DETECTION TECHNOLOGY? No. The SCD RESPONSE™ Compression System will use the same sleeves as the SCD SEQUEL™ System both the Soft Sleeve (5329, 5330, 5345, 5480, 5489) and Green Sleeve (6329, 6330, 6345, 6480) products can be used with the same tubing set. The SCD RESPONSE™ system will work with SCD EXPRESS™ Sleeves (9529, 9530, 95830T, 9545, 9780, 9789) when backward compatible tubing set #9918 is used.
DOES THE VASCULAR REFILL DETECTION WORK WITH ALL SCD™ COMPRESSION SLEEVES?The SCD RESPONSE™ Compression System has been successfully tested with all sizes of blue and green sleeves: 5329, 5330, 5345, 5480, 6329, 6330, 6345, and 6480.
DOES VASCULAR REFILL DETECTION WORK WITH THE STERILE SLEEVE OR EXTENSION TUBING? Yes, the SCD RESPONSE™ Compression System has also been successfully tested with the sterile sleeve (5336) and the extension tubing sets (5395A).
CAN I STILL USE ONLY ONE SLEEVE (WITH THE OTHER IN THE BAG)? Yes, the SCD RESPONSE™ Compression System will function appropriately with one sleeve “in the bag.” The design of the “T” tubing set allows the air pressure from the sleeves to be sensed in such a way that the system will always read the longer of the times from the two sleeves. With the case of one sleeve not on a leg, this will most likely be the shorter time of the two and the system will set the refill time based on the time determined by the sleeve applied to the leg.
WHAT DOES THE “INFLATE” LED LIGHT ON THE SCD RESPONSE™ CONTROLLER INDICATE? The INFLATE LED indicates that the sleeves are being inflated in the normal sequential manner to compress the patient’s legs to move blood toward the heart.
WHAT DOES THE “ASSESS” LED LIGHT INDICATE? When the ASSESS LED is lit, the system is measuring the venous refill time with the Vascular Refill Detection feature. This will happen every 30 cycles. When the time is being measured, the pump will be stopped during the vent portion of the cycle even if cooling was activated. Normal operation will resume on the next cycle without any need for operator intervention.
DOES THE SCD RESPONSE™ COMPRESSION SYSTEM STILL DELIVER THE CLINICALLY-PROVEN COMPRESSION TO THE LEG (45MMHG-40MMHG-30MMHG)? The SCD RESPONSE™ Compression System uses the same clinically proven compression parameters as all previous SCD™ controllers. The eleven-second-compression cycle is microprocessor-controlled to ensure 45mmHg-pressure delivery at the ankle, with resulting pressures of approximately 40mmHg and 30mmHg respectively at the calf and thigh areas.
WHAT HEMODYNAMIC EFFECTS CAN I EXPECT WITH THE NEW VASCULAR REFILL DETECTION TECHNOLOGY? The SCD RESPONSE™ Compression System was found to improve total volume of blood moved in one hour by 76% for healthy subjects in the supine position. Improvements were also seen when the subjects were in the semi-recumbent and sitting positions.
WHY DO WE CARE ABOUT MOVING MORE BLOOD? According to Virchow’s triad, one of the main reasons for clot formation is blood stasis or pooling. If more blood can be moved more often, that means blood is pooling for a shorter length of time and will be much less likely to form a clot.
IS THIS BETTER FOR CERTAIN POPULATIONS? This method of compressing the legs more frequently may provide additional protection to high risk patients, where they may have shorter refill times because of valve incompetence, or they can benefit from the blood moving more frequently and possibly being less likely to clot.
WHAT DETERMINES A PATIENT’S REFILL TIME? Various physiological factors affect a patient’s refill time including, but not limited to, valve competency, heart stroke volume and strength, proximity of the veins to the arteries and arterial blood flow.
IS THERE A CORRELATION BETWEEN AGE OR SIZE AND REFILL TIME? There does not appear to be a correlation between age or size and refill time. For example, it is not generally shown that a taller man would have a longer refill time than a shorter man.
WHAT ALARMS SHOULD I BE AWARE OF WITH THE SCD RESPONSE™ SYSTEM? The SCD RESPONSE™ system incorporates microprocessor-controlled audible and visible alarms to alert the end user to situations that require intervention. The simplified troubleshooting guide on top of the SCD RESPONSE™ controller assists the user in identifying the alarm situation and how to best go about correcting the alarm.
WILL VASCULAR REFILL DETECTION WORK WITH “KNOCK OFF” OR REPROCESSED SLEEVES? We cannot determine if the new system will work with sleeves other than SCD™ sleeves because we have no control over their design. We also cannot determine if the new system will work with reprocessed sleeves because the sleeves can be of varying degrees of integrity and performance. The SCD RESPONSE™ Compression System uses precise pressure differences in the air bladder to determine the venous refill time so it is recommended to use new SCD™ sleeves with the unit.
CAN THE VASCULAR REFILL DETECTION WORK IF THE PATIENT IS MOVING AROUND A LOT? The venous refill time determination will be made after the microprocessor has successfully achieved 45mmHg pressure at the ankle (typically 2-3 cycles). In order to accommodate the patient as they move from one position to another, the system will re-evaluate the refill time every thirty cycles to reset the cycle time if needed. The SCD RESPONSE™ Compression System will default to either 20-seconds, if a rapid refill time (less than 20 seconds) is recorded, or a 60-second refill time, if an extended refill time is monitored.
CAN VASCULAR REFILL DETECTION WORK IF THE PATIENT IS ON A CPM MACHINE? The system is designed to monitor the expansion of the lower limb to determine venous refilling. However, the movement of the CPM device may influence the ability of the SCD RESPONSE™ system to accurately measure the venous refill. In order to provide the patient with efficacious prophylaxis, the SCD RESPONSE™ system will default to a 60-second time between compressions when extended refill measurements are detected.
ARE THERE ANY EXTRA TESTS THAT THE BIO-MEDS WILL NEED TO PERFORM FOR ROUTINE MAINTENANCE? The basic routine maintenance has not changed: clean the fan filter once per month or as needed. There is an additional pressure sensor in the new unit so if opened for any type of maintenance/repair, there will now be two sensors to re-calibrate. Also, if the unit is disassembled, it is recommended that a flow test be run. With the new SCD RESPONSE™ controller, the flow test also includes a leak test to ensure that all airlines are intact.