New drug could save limbs without surgery
NCT ID NCT05372718
First seen Jun 25, 2026 · Last updated Oct 06, 2026 · Updated 3 times
Summary
This study tests a drug called Fortelyzin, which is injected directly into blood clots to dissolve them, in people with acute limb ischemia (sudden loss of blood flow to a limb). The goal is to see if it can prevent amputation as well as or better than standard surgery. About 170 adults with moderate to severe limb ischemia will be randomly assigned to receive the drug or undergo surgery.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Fortelyzin (recombinant non-immunogenic staphylokinase)
- What this could lead to
- If successful, this could offer a non-surgical option to restore blood flow and prevent limb amputation in people with acute limb ischemia.
- What could go wrong
- This is still being tested in 170 people, so results may not apply to everyone. The drug could cause bleeding or fail to dissolve the clot, requiring surgery anyway.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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170 people
The number who actually took part.
- Started
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Dec 2022
- Finished
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Sep 2026
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Men and women aged 18 and older; * Diagnosis of I-II b degree of ALI; * Patient consent to use reliable contraceptive methods throughout the study and for 3 weeks after: * women who have a negative pregnancy test and use the following contraceptives: intrauterine devices, oral contraceptives, contraceptive patch, prolonged injectable contraceptives, double barrier method of contraception. Women who are not fertile can also take part in the study (documented conditions: hysterectomy, tubal ligation, infertility, menopause for more than 1 year); * men using barrier contraception. The study may also involve men who are not fertile (documented conditions: vasectomy, infertility); * Availability of signed and dated informed consent of the patient to participate in the study. Exclusion Criteria: * Extensive bleeding at present; * Intracranial (including subarachnoid) hemorrhage at present; * Recent gastrointestinal bleeding (within 10 days); * Major surgery or major trauma within the previous 3 months, recent traumatic brain injury; * Systolic blood pressure above 180 mm Hg or diastolic blood pressure above 110 mm Hg or the need for intravenous drugs to lower blood pressure to these limits; * Pregnancy, lactation; * Known hypersensitivity to Fortelyzin®; * Platelet count less than 100,000/µL
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Kaliningrad Regional Clinical Hospital
Kaliningrad, 236016, Russia
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Kazan City Hospital No. 7
Kazan', 420103, Russia
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Kursk city emergency hospital
Kursk, Kursl Region, 305035, Russia
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S.P. Botkin Moscow Multidisciplinary Scientific and Clinical Center
Moscow, 125284, Russia
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S.S. Yudin City clinical hospital
Moscow, 115446, Russia
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Sergiyev Posad Regional Clinical Hospital
Sergiyev Posad, Moscow Oblast, 141301, Russia
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Ufa Emergency City Hospital
Ufa, 450092, Russia
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Volgograd City Clinical Hospital of Emergency #25
Volgograd, 400138, Russia
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- When every minute counts: mapping the hidden heart risks of emergency Limb-Saving surgery
- Heart pump patients: does routine leg tube prevent limb loss?
- Vacuum device shows promise for clot removal in 500-Patient study
- New device for leg clots tested in first human survey
- New Clot-Busting device tested in 500 patients