Local Anesthesia

Local Anesthesia Is Used For

Local Anesthesia is a phrase widely employed in the medical world, which refers to a clinical technique that aims to make a part of the patient’s organism insensitive to pain; this must be achieved without affecting the individual’s consciousness. In other words, applying this form of clinical procedure allows the subject to undergo dental and surgical operations with less distress and pain. Furthermore, in numerous cases (including a medical operation called cesarean section), this type of medical procedure is considered more safe and thus, recommended over other forms/levels of anesthesia (like general anesthesia). Undergoing this type of medical procedure (Local Anesthesia) can also yield the patient an effective relief for pain that does not have a surgical cause, and also to enable the applying of certain medical procedures that will help the physician establish a correct diagnosis for the patient’s current medical status. For example, the administration of lidoicaine / prilocaine (a form of topical anesthesia) is widely applied in order to ease blood collection (venipuncture) or the placement of an IV canunulae. This form of Local Anesthesia can also be employed in other types of punctures: amniocentesis, ascites drainage, and so on. Surface anesthesia can also be employed during certain endoscopic clinical procedures such as cystoscopy (that enables the physician visualize the inner surface of the patient’s bladder), bronchoscopy (the doctor can analyze the patient’s lower airways), and so on.

Numerous medical procedures require the applying of Local Anesthesia; among them are: dentistry procedures (dental extractions, for example), eye surgery, ENT procedures, shoulder and arm surgery, head and neck medical operations, surgery of the skin, and so on. Individuals who are suffering from acute pain (this type of medical condition can arise due to surgery, trauma, disruption of local/regional blood circulation, infection, and so on) often require the administration of Local Anesthesia, as in a medical setting, it is always considered important to ease the patient’s pain when the symptom’s warning function is not needed anymore. A patient who undergoes this type of anesthesia in order to deal with acute pain will experience improved comfort and a reduction in the harmful physiological consequences that this condition, left untreated, may have.

Local Anesthesia Description

Local Anesthesia is a medical procedure that consists in the patient’s administration of special medical products called local anesthetics; such drugs are able to block almost every nerve branch that links the peripheral endings of the nerves to the CNS. The most peripheral anesthetic technique is called topical anesthesia and it is generally applied to the patient’s skin. Through peripheral nerve block, the medical practitioner individually anesthetizes both large and small peripheral nerves. Through plexus anesthesia, the physician anesthetizes the entire anatomic nerve bundle. Epidural anestem and spinal anesthesia are medical procedures in which the physician merges into the patient’s CNS (this abbreviation stands for central nervous system). It is a paradox that the injection of such medication can be very painful; as a result, physicians have considered a number of methods that could ease the patient’s pain; the most common of them are warming up the solution, buffering it with bicarb, and so on.

Conduction anesthesia is achieved through the injection or the application of a local anesthetic. The substance diffuses into the patient’s nerves, thus inhibiting the propagation of signals for muscle contraction, pain, and also other similar functions of the human organism. If the patient is administered a high dose of the medication, or if he will be given a highly concentrated form, all qualities of sensation will probably be inhibited; he will also loose muscle control. On the other hand, low doses of medication, or a drug administered in a low concentration will selectively affect the patient’s sensation of pain, and will have a small (minimal) effect on his or her normal muscle power.

The effects of Local Anesthesia generally persist as long as the affected nerves present a sufficient concentration of the medication; in certain cases, the patient will be administered a vaso-constrictor medical product, that will induce a decrease of his or her local blood flow – this has the effect of slowing down the transport of the medication (anesthetic) away from the site where it has been injected.

Local Anesthesia Related Medication

Local Anesthesia consists in the administration of medicines called local anesthetics; the effects of these products are reversible. A patient who is given such a drug will probably experience loss of nociception, analgesia, and in some cases, paralysis. The most common local anesthetics that are employed in nowadays clinics belong to one of 2 main classes: aminoester and monoamide products. Synthetic medications are structurally related to a widely known substance – cocaine; what differentiates such substances from cocaine is the fact that they do not affect the patient’s sympathoadrenergic system and they present no abuse potential. In other words, the administration of such products does not lead to local vasoconstriction and / or hypertension, except for 2 drugs: Mepivacaine and Ropivacaine, which can lead to a weak form of vasoconstriction.

The local adverse manifestations of the medical products that are employed in order to achieve Local Anesthesia include neuro-vascular symptoms: numbness (prolonged anesthesia) and also paresthesia (strange sensations, tingling). Such clinical manifestations are related to nerve damage or localized impairment of a specific nerve. The administration of such products is associated with a number of risks, especially to nerve damage (either of a permanent or of a temporary nature). The risks associated with this medical procedure vary between different types of nerve blocks and different areas of the human body.

Only in rare cases, the patient experiences permanent nerve damage after undergoing peripheral nerve block (a form of Local Anesthesia), and, in most cases, the symptoms of this medical condition ease within the following weeks (4-6 weeks). The cause of most localized clinical manifestations is the following: neurotoxicity, infection at the site of the injection, hematoma at the site of the injection, the severing of the support tissue or of the nerve fibers with the catheter or with the syringe, excessive pressure due to the accumulation of fluid in a confined location, and so on.