Is tetravisc the same as lidocaine?

Tetravasc is another name for lidocaine, tetracaine, and lidocaine. Tetracaine will decompose under oxidative heating, producing carbon dioxide and nitrides. The initial decomposition temperature is 285 ° C. Due to environmental factors such as air, light, heat, and humidity, which can easily decompose, it is necessary to pay attention to maintenance during storage and use. The metabolism rate in the body is very slow and will accumulate in the body. Long term high-dose use may lead to liver toxicity or neurotoxicity. The maximum allowable concentration is 0.5%. After absorption through the skin and mucous membranes, it will undergo metabolism and exert its effects in the body. The validity period is 2-4 hours. Overall, tetracaine is a local anesthetic with poor stability, so caution and compliance with relevant safety regulations must be exercised during use.

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TetraVisc and lidocaine are both anesthetics, but their characteristics and uses differ.

• This compound is a long-acting local anesthetic with strong penetrating power, mainly used for mucosal surface anesthesia in surgeries such as dentistry, otolaryngology, ophthalmology, etc. It is generally not used for local infiltration anesthesia.
• Lidocar is a medium acting local anesthetic with an anesthesia time of 60-90 minutes. It has a fast onset, wide diffusion, and no significant vasodilation effect. It is mainly used clinically for local anesthesia, conduction block anesthesia, epidural anesthesia, and antiarrhythmic effects.

There is no good or bad between the two, and the choice should be based on the type of surgery and the patient's condition.

Other local anesthetics

 

When used in combination with this compound, they have an enhancing effect, so they should be reduced in dosage.

Adrenaline: Adding lidocaine to adenosine can prolong the action time, but it is not suitable for patients with heart disease, hypertension, hyperthyroidism, peripheral vascular disease, etc.

Sulfonamide drugs

 

Dinkacin can weaken the effects of sulfonamide drugs and should not be taken simultaneously.

Alkaline drugs such as sodium bicarbonate

 

Tetracaine aqueous solution is acidic and should not be used in combination with alkaline drugs; If certain acidic drugs are used together, due to different pH values, it can also affect the dissociation value of tetracaine, resulting in local anesthesia reduction or delayed onset time.

Iodine tincture

 

The injection site should not come into contact with iodine to prevent the precipitation of tetracaine.

Scenarios for the use of lidocaine

1. Surface anesthesia: Lidocaine is commonly used for local infiltration anesthesia in dermatology. For example, in skin lesion resection or minor cosmetic surgery, doctors may use a 1% to 2% lidocaine solution for local injection to achieve anesthesia. In ophthalmic surgery, such as cataract surgery, lidocaine can be used for surface anesthesia, typically using a solution of 0.5% to 1%.

2. Nerve block: Lidocaine is also used for nerve block anesthesia, such as brachial plexus block. In hand or upper limb surgery, doctors may inject 1.5% to 2% lidocaine solution around the nerves to block the transmission of pain signals.

3. Epidural anesthesia: Lidocaine can be used for epidural anesthesia in abdominal or lower limb surgeries. Usually, a solution of 0.5% to 1% is used and injected through the epidural space to achieve anesthesia for the lower body.

4. Postoperative pain management: Intravenous infusion of lidocaine is widely used for postoperative pain management. For example, continuous intravenous infusion of lidocaine after abdominal surgery can effectively alleviate postoperative pain, reduce the use of opioid drugs, and promote the recovery of gastrointestinal function.

5. Other applications: Lidocaine is also used to treat arrhythmia, especially in cardiac surgery. In addition, it is also used to alleviate certain types of chronic pain, such as neuralgia.

Usage scenarios of TetraVisc

1. Surface anesthesia: Dinkacin is commonly used for mucosal surface anesthesia due to its strong penetrating power. For example, in ophthalmic surgery such as corneal surgery, the use of 1% lidocaine solution can effectively anesthetize the ocular mucosa. In otorhinolaryngological surgery, such as laryngoscopy or vocal cord surgery, 1% to 2% tetracaine solution can be used for spray or smear to reduce patients' discomfort and pain.

2. Epidural anesthesia:

Dinkacin can be used for epidural anesthesia, especially in cases that require prolonged surgery. The use of 0.15% to 0.3% lidocaine solution can provide stable anesthesia effects.

3. Subarachnoid block:

Dinkacin can be used for subarachnoid block during lower limb or lower abdominal surgery. Usually, a dose of 10mg to 15mg is used, mixed with glucose injection and injected to achieve anesthesia for the lower body.

4. Nerve conduction block: Dicaine is also used for nerve conduction block. For example, during hand or foot surgery, doctors may inject 0.1% to 0.2% lidocaine solution around the nerves to block the transmission of pain signals.

5. Anesthesia in special circumstances: Tetracaine may be a better choice in certain special circumstances, such as patients who are allergic to other local anesthetics or in situations where rapid anesthesia effects are needed.

Comparison of effects

1. Effective time: The effective time of lidocaine is usually faster than that of lidocaine, because lidocaine has higher lipid solubility and can penetrate tissues faster.
2. Duration: The anesthetic effect of lidocaine usually lasts longer than that of lidocaine, making it more suitable for situations requiring prolonged surgery.
3. Safety: Lidocaine has relatively low toxicity and is suitable for a wider range of clinical situations, including antiarrhythmic treatment in cardiac surgery. However, tetracaine has relatively high toxicity and needs to be used under strict dosage control.

Lidocaine and TetraVisc are both effective local anesthetics, but there are significant differences in their specific usage scenarios, mechanisms of action, and effects during surgery. Doctors will choose the most suitable medication based on the type of surgery, patient condition, and expected anesthesia effect. Lidocaine is widely used in various surgeries due to its low toxicity and long duration of action. Tetracaine, on the other hand, is more suitable for surgeries that require rapid anesthesia due to its fast onset time and strong penetrating power. But when using these drugs, doctors will also strictly control the dosage to ensure the safety and comfort of patients.