enVVeno Medical Corp 10-K

ITEM 1. Business Overview enVVeno Medical Corporation is a late stage clinical med-tech company focused on the advancement of innovative bioprosthetic (tissue-based) solutions to improve the standard of care for the treatment of venous disease. Chronic Venous Disease (CVD) is the world’s most prevalent chronic disease, impacting approximately 71% of the adult population of the U.S. Chronic Venous Insufficiency (CVI), is a large subset of CVD, which most often occurs when valves inside of the veins of the leg become damaged, resulting in the backwards flow of blood (reflux), blood pooling in the lower leg, increased pressure in the veins of the leg (venous hypertension) and in severe cases, venous ulcers that are difficult to heal. The Company is developing surgical and non-surgical replacement venous valves for patients suffering from severe CVI of the deep venous system of the leg. The Company’s lead product is the VenoValve®, which is a first-in-class surgical replacement venous valve that is currently being evaluated in a U.S. pivotal study. The Company is also developing a second product called enVVe™, which is a first-in-class, non-surgical, transcatheter based replacement venous valve. The Company is currently waiting for regulatory approval to begin a first-in-human study for enVVe. Both the VenoValve and enVVe are designed to act as one-way valves, to help assist in propelling blood up the veins of the leg, and back to the heart and lungs. The VenoValve and enVVe are being developed first for approval by the U.S. Food and Drug Administration (FDA). We expect the VenoValve to be eligible for FDA approval first, followed two to three years later by enVVe. Once approved, we expect the VenoValve and enVVe to co-exist, with the VenoValve as a surgical replacement venous valve option and enVVe as a non-surgical replacement venous valve option. There are currently no devices approved as surgical or non-surgical replacement venous valves, and there are no effective treatments for deep venous CVI caused by incompetent valves. Our team of officers and directors has been affiliated with numerous medical devices that have received FDA approval or CE marking and that have been commercially successful. We develop and manufacture our products in a 14,507 sq. ft. leased manufacturing facility in Irvine, California, which has been ISO 13485-2020 certified for the design, development and manufacturing of tissue based implantable medical devices. 2 CVI Background Chronic venous disease (“CVD”) is the world’s most prevalent chronic disease. CVD is generally classified using a standardized system known as CEAP (clinical, etiological, anatomical, and pathophysiological). The CEAP system consists of seven clinical classifications (C0 to C6) with C4, C5 and C6 being the most severe categories of CVD. Chronic Venous Insufficiency (“CVI”) is a large subset of CVD and is generally used to describe patients with C4 to C6 CVD. CVI is a debilitating condition that affects the venous system of the leg causing pain, swelling, edema, skin changes, and ulcerations. The human leg contains three vein systems: the deep vein system, the superficial vein system, and the perforator vein system which connects the deep system to the superficial system. The deep venous system is located below the muscle and facia in the center portion of the leg and is responsible for approximately 90% of the blood flow. In order for blood to return to the heart from the foot, ankle, and lower leg, the calf muscle serves as a pump and pushes the blood up the veins of the leg against gravity and through a series of one-way valves. Each valve is supposed to open as blood passes through, and then close as blood progresses up the veins of the leg to the next valve. CVI occurs when the one-way valves in the veins of the leg fail and become incompetent. When the valves fail, gravity causes the blood to flow backwards and in the wrong direction (reflux). As blood pools in the lower leg, pressure inside the veins increases (venous hypertension). Reflux, and the resulting venous hypertension, causes the leg to swell, resulting in debilitating pain, and in the most severe cases, venous ulcers. Severe CVI sufferers experience a significantly reduced quality of life. Daily activities such as preparing meals, housework, and personal hygiene (washing and bathing) become difficult due to reduced mobility. For many severe CVI sufferers, intense pain, which frequently occurs at night, prevents patients from getting adequate sleep. Severe CVI sufferers are known to miss approximately 40% more workdays than the average worker. A high percentage of venous ulcer patients also experience severe itching, leg swelling, and an odorous discharge. Wound dressing changes, which occur several times a week, can be extremely painful. Venous ulcers from deep venous CVI are very difficult to heal, and a significant percentage of venous ulcers remain unhealed for more than a year. Even if healed, recurrence rates for venous ulcers are known to be high (20% to 40%) within the first year and as high as 60% after five years. Patients with severe CVI often become housebound and experience social isolation due to difficulty with ambulation. As a result, studies have shown that patients with active venous ulcers experience higher rates of anxiety and depression, with reported rates of anxiety of up to 30% and depression up to 40%. Rates of depression caused by venous ulcers among the elderly are even higher, with 48% of elderly venous ulcer patients having severe depressive symptoms. Prevalence is generally defined as the portion of the population that has a given condition. Estimates indicate that the prevalence of people in the U.S. with severe, deep venous CVI (C4 to C6 disease) with reflux to be approximately 20 million. Incidence is generally defined as the number of new cases of an ailment that develop in a given time period. We estimate that approximately 3.5 million new patients with severe deep venous CVI are diagnosed each year in the U.S. including patients that develop venous leg ulcers (C6 patients). The average patient seeking treatment of a venous ulcer spends as much as $30,000 a year on wound care, and the total direct medical costs from venous ulcer sufferers in the U.S. has been estimated to exceed $3 billion a year. 3 VenoValve The VenoValve is a porcine based replacement venous valve developed at enVVeno Medical to be surgically implanted in the deep venous system of the leg to treat severe CVI. By reducing reflux and lowering pressure (venous hypertension) within the deep venous system of the leg, the VenoValve has the potential to reduce or eliminate the symptoms of severe deep venous CVI, including the potential to heal recurring venous leg ulcers. The VenoValve is implanted into the femoral vein of the patient in an open surgical procedure via a 5-to-6-inch incision in the upper thigh. As our planned initial entrant to the replacement venous valve market, we estimate that approximately 2.5 million people with severe deep venous CVI in the U.S. would be candidates for the VenoValve. VenoValve Clinical Status After consultation with the FDA, and as a precursor to the U.S. pivotal trial, in 2020 we conducted a small first-in-human study for the VenoValve in Colombia which included eleven (11) patients. In addition to providing safety and efficacy data, the purpose of the first-in-human study was to provide proof of concept, and to provide feedback to make any necessary product modifications or adjustments to our surgical implantation procedure for the VenoValve prior to conducting the SAVVE (Surgical Anti-reflux Venous Valve Endoprosthesis) U.S. pivotal trial. Endpoints for the VenoValve first-in-human study included safety (device related adverse events), reflux, measured by Duplex Ultrasound, a rVCSS score used by the clinician to measure disease severity and progress, a VAS score used by the patient to measure pain, and quality of life measurements. Results from the one year first-in-human study were presented at the Charing Cross International Symposium in April of 2021. Among the eleven (11) patients in the study, reflux improved an average of 54%, Venous Clinical Severity Scores (“VCSSs”) improved an average of 56%, and visual analog scale (VAS) scores, which are used by patients to measure pain, improved an average of 76%, all at one (1) year when compared to pre-surgery levels. VCSS scores are commonly used by clinicians in practice and in clinical trials to objectively assess outcomes in the treatment of venous disease, and include ten characteristics including pain, inflammation, skin changes such as pigmentation and induration, the number of active ulcers, and ulcer duration. The improvement in VCSS scores is significant and indicates the VenoValve patients who had severe CVI pre-surgery, had mild CVI or the complete absence of disease at one-year post surgery. Related safety incidences during the one year first-in-human study for the VenoValve included one (1) fluid pocket (which was aspirated), intolerance from Coumadin anticoagulation therapy, three (3) minor wound infections (treated with antibiotics), and one occlusion due to patient non-compliance with anti-coagulation therapy. On August 3, 2020, we announced that the FDA granted Breakthrough Device Designation status to the VenoValve. The FDA’s Breakthrough Devices Program was established to enable priority review for devices that provide more effective treatment or diagnosis of life threatening or irreversibly debilitating diseases or conditions. The goal of the FDA’s Breakthrough Devices Program is to provide patients and health care providers with timely access to medical devices by speeding up their development, assessment, and review, while preserving the FDA’s mission to protect and promote public health. In March 2021, we submitted an IDE application with the FDA and in April 2021, we received notification from the FDA that our IDE application was approved. An investigational device exemption or IDE from the FDA is required before a medical device company can proceed with a pivotal trial for a class III medical device. This approval allowed us to proceed with our SAVVE study, a prospective, non-blinded, single arm, multi-center study of seventy-five (75) CVI patients to be enrolled at up to 20 U.S. sites. We later received permission from the FDA to increase the number of clinical sites to up to 30. At the end of the VenoValve first-in-human study, eight (8) study participants agreed to additional monitoring. In November of 2022, three-year follow-up data was presented at the 49th Annual VEITH Symposium in New York city for this cohort of patients. That data indicated no recurrences of the severe CVI that was present pre-VenoValve, including no ulcer recurrences for those patients who had venous ulcers (C6 patients) prior to receiving the VenoValve. There were no reported safety issues from the end of one (1) year first-in-human study to the end of the three (3) year reporting period. In addition, the patients continued to show improvements compared to pre-surgery levels, reporting 62%, 64%, and 84%, average improvements in reflux, VCSS, and VAS scores, respectively, at an average of three (3) years post VenoValve surgery. One DVT occurred between year 2 and year 3 due to patient non-compliance with anti-coagulation medication. In addition to presenting at leading academic and vascular conferences around the world, results from the VenoValve first-in-human study and following observational period have been published in the Journal of Vascular Surgery Venous and Lymphatic Disorders , the Journal of Vascular and Endovascular Surgery , and JAMA Surgery Journal. 4 In November of 2022, we announced we had passed a preliminary safety review by the FDA for the first twenty (20) patients enrolled in the SAVVE trial. The FDA had requested that we submit preliminary safety data at thirty (30) days post VenoValve implantation for the first twenty (20) patients enrolled in the study. The preliminary safety data included one (1) device related (mild) and two (2) procedure related (moderate) adverse events. After review by the FDA, the study was cleared to continue without modification or interruption. As widely reported in the media, the lasting impact from the COVID-19 pandemic has put an enormous strain on hospital resources including their clinical staff. Hospitals continue to be severely understaffed, which impacts the rate at which clinical trials enroll and progress. We have taken several steps to help address the hospital staffing shortages, including our hiring of 4 Clinical Technologists, with extensive and specialized experience in duplex sonography of the deep venous system, to assist in training site personnel, proctoring Duplex Ultrasound examinations, and providing assistance for the SAVVE study. As of the date of this Annual Report, we have twenty (20) clinical trial sites activated and eligible to enroll patients in the SAVVE trial and have completed forty-three (43) successful surgeries. Our guidance is to reach full enrollment in the SAVVE study by the end of the second quarter of 2023. Enrollment continues to be somewhat inconsistent, with strong enrollment months interspersed with slower enrollment months. We will change the guidance, if necessary, if and when we determine that new guidance is necessary. enVVe On September 21, 2022, we announced the development of a non-surgical transcatheter based replacement venous valve called enVVe™, for the treatment of CVI of the deep veins of the leg. Preliminary bench testing and animal testing for enVVe were completed before our announcement. We also filed an application seeking approval to begin first-in-human (FIH) testing in Columbia which we expect to receive by the end of the first quarter of 2023. The enVVe first-in-human trial will be known as the Transcatheter Anti-reflux, Venous Valve Endoprosthesis first-in-human (TAVVE-FIH) study. The initial phase of the TAVVE-FIH study will seek to enroll 3 to 5 patients across multiple sites. Several parameters will be evaluated over the course of the study including safety and technical success of the enVVe venous valve delivery system, and the safety and clinical performance of the enVVe venous valve. enVVe is delivered into the femoral vein of the patient via a minimally invasive procedure requiring no general anesthesia and no overnight hospital stay. Due to the minimally invasive nature of the procedure, we expect to be able to reach patients with less severe CVI or who are otherwise not good candidates for a surgical device, and estimate the U.S. market for enVVe to be approximately 3.5 million patients. Cash Position During 2021 we raised $61.4 million in gross proceeds from capital in offerings of our securities including a public offering in February, and a registered direct offering in September priced at the market under Nasdaq rules and purchased by a fund managed by Perceptive Advisors, a leading life sciences investment firm. We finished 2022 with approximately $39.1 million of cash and investments. At our existing cash burn rate of approximately $4 to $5 million per quarter, we should have sufficient cash to fund operations through the end of 2024 and into 2025. 5 Government Regulation Our product candidates and our operations are subject to extensive regulation by the FDA, and other federal and state authorities in the United States, as well as comparable authorities in foreign jurisdictions. Our product candidates are subject to regulation as medical devices in the United States under the Federal Food, Drug, and Cosmetic Act (“FDCA”), as implemented and enforced by the FDA. The FDA regulates the development, design, non-clinical and clinical research, manufacturing, safety, efficacy, labeling, packaging, storage, installation, distribution, servicing, recordkeeping, premarket clearance or approval, adverse event reporting, advertising, promotion, marketing, and import and export of medical devices to ensure that medical devices distributed domestically are safe and effective for their intended uses and otherwise meet the requirements of the FDCA. PMA Approval Pathway Class III devices such as the VenoValve and enVVe generally require pre-market approval (PMA) before they can be marketed in the U.S. The PMA review and approval process is more demanding than the 510(k) premarket notification process. In a PMA, the manufacturer must demonstrate that the device is safe and effective, and the PMA must be supported by extensive data, including data from preclinical studies and human clinical trials. The PMA also must contain a full description of the device and its components, a full description of the methods, facilities and controls used for manufacturing, and proposed labeling. Following receipt of a PMA, the FDA determines whether the application is sufficiently complete to permit a substantive review. If the FDA accepts the application for review, it has 180 days under the FDCA to complete its review of a PMA, although in practice, the FDA’s review often takes significantly longer, and can take several years. An advisory panel of experts from outside the FDA may be convened to review and evaluate the application and provide recommendations to the FDA as to the approvability of the device. The FDA may or may not accept the panel’s recommendation. In addition, the FDA generally will conduct a pre-approval inspection of the applicant or its third-party manufacturers’ manufacturing facility or facilities to ensure compliance with the QSR. The FDA will approve the new device for commercial distribution if it determines that the data and information in the PMA constitute valid scientific evidence and that there is reasonable assurance that the device is safe and effective for its intended use(s). The FDA may approve a PMA with post-approval conditions intended to ensure the safety and effectiveness of the device, including, among other things, restrictions on labeling, promotion, sale and distribution, and collection of long-term follow-up data from patients in the clinical study that supported PMA approval, or requirements to conduct additional clinical studies post-approval. The FDA may condition PMA approval on some form of post-market surveillance when deemed necessary to protect the public health or to provide additional safety and efficacy data for the device in a larger population or for a longer period of use. In such cases, the manufacturer might be required to follow certain patient groups for a number of years and to make periodic reports to the FDA on the clinical status of those patients. Failure to comply with the conditions of approval can result in material adverse enforcement action, including withdrawal of the PMA approval. Certain changes to an approved device, such as changes in manufacturing facilities, methods or quality control procedures, or changes in the design performance specifications, which affect the safety or effectiveness of the device, require submission of a PMA supplement. PMA supplements often require submission of the same type of information as a PMA, except that the supplement is limited to information needed to support any changes from the device covered by the original PMA and may not require as extensive clinical data or the convening of an advisory panel. Certain other changes to an approved device require the submission of a new PMA, such as when the design change causes a different intended use, mode of operation and technical basis of operation, or when the design change is so significant that a new generation of the device will be developed, and the data that were submitted with the original PMA are not applicable for the change in demonstrating a reasonable assurance of safety and effectiveness. The VenoValve will require the approval of a PMA. Clinical Trials in Support of PMA Clinical trials are almost always required to support a PMA submission. All clinical investigations of devices to determine safety and effectiveness must be conducted in accordance with the FDA’s investigational device exemption (IDE) regulations, which govern investigational device labeling, prohibit promotion of the investigational device and specify an array of recordkeeping, reporting and monitoring responsibilities of study sponsors and study investigators. If the device presents a “significant risk,” to human health, as defined by the FDA, the FDA requires the device sponsor to submit an IDE application to the FDA, which must become effective prior to commencing human clinical trials. A significant risk device is one that presents a potential for serious risk to the health, safety or welfare of a patient and either is implanted, used in supporting or sustaining human life, substantially important in diagnosing, curing, mitigating or treating disease or otherwise preventing impairment of human health, or otherwise presents a potential for serious risk to a subject. The VenoValve required IDE applications prior to human testing in the United States, and we believe any future products such as the enVVe will also require IDE applications before human testing in the United States. An IDE application must be supported by appropriate data, such as animal and laboratory test results, showing that it is safe to test the device in humans and that the testing protocol is scientifically sound. The IDE will automatically become effective 30 days after receipt by the FDA unless the FDA notifies the company that the investigation may not begin. If the FDA determines that there are deficiencies or other concerns with an IDE for which it requires modification, the FDA may permit a clinical trial to proceed under a conditional approval. In addition to IDE approval, a human study must be approved by, and conducted under the oversight of, an Institutional Review Board, or IRB, for each clinical site. The IRB is responsible for the initial and continuing review of the study, and may pose additional requirements for the conduct of the study. If an IDE application is approved by the FDA and one or more IRBs, human clinical trials may begin at a specific number of investigational sites with a specific number of patients, as approved by the FDA. Acceptance of an IDE application for review does not guarantee that the FDA will allow the IDE to become effective and, if it does become effective, the FDA may or may not determine that the data derived from the trials support the safety and effectiveness of the device or warrant the continuation of clinical trials. An IDE supplement must be submitted to, and approved by, the FDA before a sponsor or investigator may make a change to the investigational plan that may affect its scientific soundness, study plan or the rights, safety or welfare of human subjects. During a study, the sponsor is required to comply with the applicable FDA requirements, including, for example, trial monitoring, selecting clinical investigators and providing them with the investigational plan, ensuring IRB review, adverse event reporting, record keeping and prohibitions on the promotion of investigational devices or on making safety or effectiveness claims for them. The clinical investigators in the clinical study are also subject to FDA’s regulations and must obtain patient informed consent, rigorously follow the investigational plan and study protocol, control the disposition of the investigational device and comply with all reporting and recordkeeping requirements. Additionally, after a trial begins, we, the FDA or the IRB could suspend or terminate a clinical trial at any time for various reasons, including a belief that the risks to study subjects outweigh the anticipated benefits. 6 Post-market Regulation After a device is cleared or approved for marketing, numerous and pervasive regulatory requirements continue to apply. These include: establishing registration and device listing with the FDA; QSR requirements, which require manufacturers, including third-party manufacturers, to follow stringent design, testing, control, documentation and other quality assurance procedures during all aspects of the design and manufacturing process; labeling regulations and FDA prohibitions against the promotion of investigational products, or “off-label” uses of cleared or approved products; requirements related to promotional activities; clearance or approval of product modifications that could significantly affect safety or effectiveness or that would constitute a major change in intended use of one of our cleared devices; medical device reporting regulations, which require that a manufacturer report to the FDA if a device it markets may have caused or contributed to a death or serious injury, or has malfunctioned and the device or a similar device that it markets would be likely to cause or contribute to a death or serious injury, if the malfunction were to recur; correction, removal and recall reporting regulations, which require that manufacturers report to the FDA field corrections and product recalls or removals if undertaken to reduce a risk to health posed by the device or to remedy a violation of the FDCA; and post-market surveillance activities and regulations. Regulation Outside of the U.S. Each country or territory outside of the U.S. has its own rules and regulations with respect to the manufacture, marketing and sale of medical devices. For example, in December of 2018, we received regulatory approval from Instituto Nacional de Vigilancia de Medicamentos y Alimentos, the Colombian equivalent of the U.S. Food and Drug Administration, for our first-in-human study for the VenoValve in Colombia. At this time, other than the first-in-human trial in Colombia, we have not determined which countries outside of the U.S., if any, we will seek approval for our product candidates. Our Competitive Strengths We believe we will offer the venous disease treatment market a compelling value proposition with the launch of our product candidates, if approved, for the following reasons: ● We have extensive experience of proprietary processing and manufacturing methodology specifically applicable to the design, processing, manufacturing and sterilization of our biologic tissue devices. ● We operate a 14,507 square foot manufacturing facility in Irvine, California. Our facility is designed expressly for the manufacture of Class III tissue based implantable medical devices and is equipped for research and development, prototype fabrication, current good manufacturing practices, or cGMP, and manufacturing and shipping for Class III medical devices, including biologic cardiovascular devices. ● We have attracted senior executives who are experienced in research and development and who have worked on numerous medical devices that have received FDA approval or CE marking. We also have the advantage of an experienced board of directors and scientific advisory board who will provide guidance as we move towards market launch. Intellectual Property We possess an extensive proprietary processing and manufacturing methodology specifically applicable to the design, processing, manufacturing and sterilization of biologic devices. This includes FDA compliant quality control and assurance programs, proprietary tissue processing technologies demonstrated to eliminate recipient immune responses, trusted relationship with abattoir suppliers, and a combination of tissue preservation and gamma irradiation that enhances device functions and guarantees sterility. We have filed numerous patent applications for the VenoValve with the U.S. Patent and Trademark Office (USPTO) and throughout the world. We currently have seventeen (17) patents granted from agencies around the world including four (4) from the USPTO. Employees As of February 27, 2023, we had thirty (30) full-time employees. None of our employees are represented by a collective bargaining agreement, and we have never experienced any work stoppage. We believe we have good relations with our employees. Corporate Information We were incorporated in Delaware on December 22, 1999. Our principal executive offices are located at 70 Doppler, Irvine, California, 92618, and our telephone number is (949) 261-2900. Our corporate website address is www.envveno.com. The information contained on or accessible through our website is not a part of this Annual Report, and the inclusion of our website address in this Annual Report is an inactive textual reference only. 7