Name: SYNVISC® (HYLAN G-F 20).
Ingredients: Hylan (8mg/mL), sodium chloride (8.5mg/mL), disodium hydrogen phosphate (0.16mg/mL), sodium dihydrogen phosphate hydrate (0.04mg/mL).
Size: 3x2mL pre-filled syringe.
Manufacturer: Genzyme Europe B.V.
Also Included: Package Insert only. It is recommended to use a 18-22G range needle for injection (obtained separately).
Storage: Store between 2℃ and 30℃. Do not freeze.
Remarks: Sterile packaging.
WHAT IS SYNVISC?
THE ACTIVE COMPONENTS OF THIS IMPLANT ARE:
- 8mg/mL of hyaluronan
- 8.5mg/mL of sodium chloride
- 0.16mg/mL of disodium hydrogen phosphate
- 0.04mg/mL of sodium dihydrogen phosphate hydrate
Each box of Synvisc comes with 3-2ml syringe prefilled with the gel, a set of labels for traceability, and an informational leaflet. This product is sterilised and fragile, and must be stored away from light in a clean room with a regulated temperature between 2ºC to 30ºC.
WHAT IS IT USED FOR?
Synvisc is indicated for use in patients whose osteoarthritis symptoms have not responded to other forms of therapy and treatment, like rehabilitation support items, physiotherapy, or analgesics. This viscosupplement is perfect for joints in the hips, knees, shoulders, or ankles. With these injections, patients do not have to suffer from painful and restricted joint movement any more. The implant may also allow patients to delay or avoid restorative surgeries.
HOW DOES IT WORK?
Joints in the body describe the point where 2 or more bones meet. Joints are categorized into 3 main types based on their mobility. Fibrous joints are immobile and are connected with tough connective tissues (e.g. collagen fibres), while cartilaginous joints are only semi-movable and are connected with cartilage. The third type of joint—synovial joint—is highly mobile due to the presence of synovial fluid. This type of joint is encased within the synovial membrane, and the ends of the bones are protected with articular cartilage. Articular cartilage undergoes a process called weeping lubrication, whereby it continuously secretes synovial fluid into the joint space. The fluid allows for a gliding movement and absorbs impact in the joints.
However, the efficiency of these joints can be affected by degenerative disorders like osteoarthritis. This inflammatory disease starts when the strong articular cartilage disintegrates, causing a decrease in synovial fluid production. Because of this process, the bones begin to grind against each another and the surrounding tissues get inflamed, resulting in rough and painful movements. As the severity of the disease increases, the patients lose more mobility. Some patients suffering from osteoarthritis may have to resort to corrective surgeries when initial conservative treatments (e.g. supplements, painkillers, mobility supports) fail. However, Synvisc shares a similar viscoelasticity to synovial fluid and is designed to be used as a viscosupplement to replenish the lost lubricating fluid. After treatment, movements will be smoother and pain is lessened. Your patients get to enjoy a better quality of life and can delay or avoid surgery.
HOW TO INJECT SYNVISC?
As part of an initial evaluation, discuss your patient’s medical history, including health status, severity of joint damage, allergies, and any supplements and medication taken. This information will allow you to plan an appropriate treatment plan.
- Prior to injection, ensure that the packaging is still intact and the gel is at room temperature.
- Clean and sanitise the treatment area.
- Remove any excess synovial fluid or effusion from the area to be treated before administering Synvisc.
- Twist the cap on the prefilled syringe and pull it off to minimise gel leakage.
- Attach and secure a needle, between 18G to 22G, to the syringe.
- Inject the entirety of the 2mL syringe into the synovial space of 1 joint.
- Discard all used needles, syringes, and any leftover gel.
For the knee joints, administer 1 syringe every week for a total of 3 injections. The maximum dosage is 6 injections within a 6 month period, with a minimum 4-week break between sessions. Other joints such as the shoulders, ankles, and hips, can be treated with 1 initial injection. However, if 1 injection does not suffice for your patient, you may administer the second injection 1 to 3 months after the initial treatment session. This is an intra-articular injection and should be injected into the synovial space. Do not administer into blood vessels or into synovial tissues, as it may cause adverse reactions. All procedures must adhere to aseptic standards and must be performed by a certified doctor.
HOW LONG DOES IT LAST?
The effects of Synvisc injections are usually observed a month following treatment, and these effects can last between 6 months to 12 months. However, results may vary across patients.
IS THIS PRODUCT SAFE?
Synvisc is manufactured by Genzyme, an American biotechnology company with extensive experience in developing innovative therapies for debilitating diseases. Their products are made with only high-grade materials. The active ingredient—hyaluronan—is sourced from rooster combs. Hyaluronan, also known as hyaluronic acid, a complex carbohydrate which exists naturally in the body.
This product is contraindicated in some individuals, including:
- Patients with allergy to avian byproducts, such as eggs and feathers;
- Patients with severely inflamed or infected joints;
- Patients with inflamed or infected skin covering the affected joints;
- Expecting mothers;
- Nursing mothers;
- Patients under the age of 18.
Conduct a comprehensive medical test and obtain the patient’s medical history to ensure suitability. Refer to the informational leaflet for a complete list of contraindications.
SYNVISC SIDE EFFECTS
Patients who have previously received Synvisc treatments have reported incidences of mild side effects.
COMMON SIDE EFFECTS:
- Warm sensation
Patients should recover from these minor reactions within a few days. Advise your patients to avoid high impact and strenuous activities for at least 48 hours after treatment.
RARE ADVERSE REACTIONS
- Muscle aches
- Facial swelling
Patients should seek medical care if they display such responses. Refer to the informational leaflet for a complete list of reactions.
WHAT IS IT MADE OF?
Synvisc is made of high molecular weight fluid consisting of Hylan A and Hylan B polymers, which are derived from rooster combs. This injectable is a chemically cross-linked hyaluronan solution with a high viscosity that closely mimics the properties and actions of synovial fluid. Injections can provide durable lubricating action and physical support to joints affected by osteoarthritis, reducing pain and stiffness, and enhancing mobility.
Warning! The product is intended solely for professional use in a medical environment and under professional supervision. The product is supplied to medical professionals who specialize in aesthetic medicine (plastic surgery, facial treatments) and work under individual medical licenses as aestheticians or in dedicated clinics. Unprofessional use by individuals without a medical background may lead to severe adverse effects and health harm.