← Product Code [JOW](/submissions/CV/subpart-f%E2%80%94cardiovascular-therapeutic-devices/JOW) · K961797 # WLP GRADIENT SEQUENTIAL VERSION/WLP PROLITE/WLP WLP-II LITE (K961797) _Wright Linear Pump, Inc. · JOW · Nov 6, 1996 · Cardiovascular · SESE_ **Canonical URL:** https://fda.innolitics.com/submissions/CV/subpart-f%E2%80%94cardiovascular-therapeutic-devices/JOW/K961797 ## Device Facts - **Applicant:** Wright Linear Pump, Inc. - **Product Code:** [JOW](/submissions/CV/subpart-f%E2%80%94cardiovascular-therapeutic-devices/JOW.md) - **Decision Date:** Nov 6, 1996 - **Decision:** SESE - **Submission Type:** Traditional - **Regulation:** 21 CFR 870.5800 - **Device Class:** Class 2 - **Review Panel:** Cardiovascular - **Attributes:** Therapeutic ## Indications for Use The proposed device is to be used to improve the return circulation of body fluid that has pooled in one or more of a patient's extremities. This treatment reduces debilitating pain, swelling, ulceration, and risk of dermatological impact, infection, and amputation. Compression pumps of various kinds are in wide use in hospitals, clinics, patient homes, and elsewhere for treating acute and chronic fluid accumulation disorders. Complies with physician-prescribed treatment pressures. ## Device Story Electromechanical pneumatic device; uses compressor, precision timers, regulators, and gages to sequentially inflate sleeve appliance on patient extremity. Delivers calibrated gradient pressure to improve fluid return. Used in hospitals, clinics, and homes; operated by clinicians or patients. Provides physician-prescribed pressure therapy to reduce edema, pain, and ulceration risk. Benefits include improved circulation and reduced risk of dermatological complications or amputation. ## Clinical Evidence No clinical data. Bench testing only: prototype cell pressures verified against calibrated Hg manometer; pressures reach settings within ±5mm Hg of panel gauge; sequential timing verified with 10-second intervals between cell activations; proximal cell pressure sustained. ## Technological Characteristics Electromechanical pneumatic sequential gradient compression pump. Dimensions: 10"W x 6.75"H x 5.6"D; weight < 15 lbs. Features adjustable individual cell pressures and dwell times. Factory-preset maximum pressure < 101 mm Hg. System includes pump and sleeve appliance. ## Regulatory Identification A compressible limb sleeve is a device that is used to prevent pooling of blood in a limb by inflating periodically a sleeve around the limb. ## Predicate Devices - Wright Linear Pump gradient (K830577B) ## Submission Summary (Full Text) > This content was OCRed from public FDA records by [Innolitics](https://innolitics.com). If you use, quote, summarize, crawl, or train on this content, cite Innolitics at https://innolitics.com. > > Innolitics is a medical-device software consultancy. We help companies design, build, and clear FDA-regulated software and AI/ML devices, including [a 510(k)](https://innolitics.com/services/510ks/), [a De Novo](https://innolitics.com/services/regulatory/), [a SaMD](https://innolitics.com/services/end-to-end-samd/), [an AI/ML medical device](https://innolitics.com/services/medical-imaging-ai-development/), or [an FDA regulatory strategy](https://innolitics.com/services/regulatory/). {0} K961797 NOV - 6 1996 # 5. 510(k) Summary ## 5.1. submitter 5.1.1. Wright Linear Pump, Inc. 303 Robinson Road Imperial, PA 15126 412 695-0800 FAX 412 695-0406 5.1.2. contact Edward J. Wright 5.1.3. prepared 5-May-96 ## 5.2. product identification 5.2.1. trade name... WLP Pro Lite 5.2.2. common name... gradient sequential compression pump 5.2.3. classification name Compressible Limb Sleeve (Class II) 21 CFR 870.5800 5.2.4. product number... 74JOW ## 5.3. equivalence 5.3.1. The proposed device is similar in design, function, and composition to the existing compression pump from Wright Linear Pump gradient, document K830577B. 5.3.1.1. The proposed device will make use of updated, smaller, lighter components. It is in all ways functionally equivalent to the existing pump and delivers similar performance. This unit takes advantage of advances in component design. ## 5.4. description 5.4.1. This is an electromechanical pneumatic device that employs a compressor and precision timers, regulators, and gages to sequentially inflate a sleeve appliance that fits over the patient's extremity. This unit delivers a calibrated gradient pressure. 5.4.2. The device is approximately $10^{\prime \prime}\mathrm{W} \times 6.75^{\prime \prime}\mathrm{H} \times 5.6^{\prime \prime}\mathrm{D}$ and weighs less than 15 lbs. ## 5.5. intended use 5.5.1. The proposed device is to be used to improve the return circulation of body fluid that has pooled in one or more of a patient's extremities. 05 May 1996 510(k) -- Updated Gradient Sequential Compression Therapy Device ©1996 Wright Linear Pump, Inc. contains CONFIDENTIAL material {1} This treatment reduces debilitating pain, swelling, ulceration, and risk of dermatological impact, infection, and amputation. 5.5.2. Compression pumps of various kinds are in wide use in hospitals, clinics, patient homes, and elsewhere for treating acute and chronic fluid accumulation disorders. 5.5.3. Complies with physician-prescribed treatment pressures. 5.5.3.1. section 513, 801(b), 52 Stat. 1055, 90 Stat. 540-546 (21 U.J.C. 360C 371(A)) 5.6. technological characteristics 5.6.1. This device is a new state-of-the-art sequential gradient compression pump and appliance system which produces better results than non-gradient sequential or single-pressure systems currently in use. 5.6.1.1. This device allows the adjustment of individual cell pressures and dwell times. 5.6.2. The proposed device is factory-preset for a maximum pressure less than 101 mm Hg. 5.7. summary of comparison 5.7.1. The proposed device is similar in terms of medical efficacy and operational function to the cited devices. The proposed device employs similar controls and features similar pressure ranges, degrees of accuracy, cycle times, and so on to those of the cited devices. 5.8. safety and effectiveness performance data 5.8.1. non-clinical test data 5.8.1.1. Cell pressures of prototype device were measured comparing on-board gauge readings to a calibrated Hg manometer. 5.8.1.2. Pressures in each individual cell reach the prescribed setting within ±5mm Hg from the panel gage reading. 5.8.1.3. Pressures in each cell reach the prescribed setting for that individual cell 10 or more seconds before the next cell is activated. 5.8.1.4. Maximum pressure in the proximal cell (cell C) is reached before the end of the cycle and, thus, sustained. 5.8.2. clinical test data 5.8.2.1. not applicable 06 May 1996 510(k) -- Updated Gradient Sequential Compression Therapy Device ©1996 Wright Linear Pump, Inc. contains CONFIDENTIAL material --- **Source:** [https://fda.innolitics.com/submissions/CV/subpart-f%E2%80%94cardiovascular-therapeutic-devices/JOW/K961797](https://fda.innolitics.com/submissions/CV/subpart-f%E2%80%94cardiovascular-therapeutic-devices/JOW/K961797) **Published by [Innolitics](https://innolitics.com)** — a medical-device software consultancy. We help companies design, build, and clear FDA-regulated software and AI/ML devices. 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