Dr.Prof. Miguel Ángel Arráez Sánchez

Dr.Prof. Miguel Ángel Arráez Sánchez
Neurological Surgery
Málaga


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Dr.Prof. Miguel Ángel Arráez Sánchez

Neurosurgeon in
Málaga

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Dr.Prof. Miguel Ángel Arráez Sánchez areas of expertise:

Professional statement

Eminent specialist in neurosurgery, Dr. Arráez Sanchez has a long history, a fact that certifies one of the foremost experts in his field, both nationally and internationally. Current Chief of Neurosurgery Hospital Chiron Malaga and is the founder of Arráez Advanced Institute of Neurosurgery. After conducting their training MIR has undertaken several training periods in Europe and the US, which enabled it to improve surgical techniques in which he is an expert. His professional achievements include pioneering the introduction of techniques such as brain tumor resection guided by fluorescence in Spain. Member of the main neurosurgical societies, national and international level, which has been in charge of positions.

*Translated with Google translator. We apologize for any imperfection

 Videos of doctor

Instituto Arráez. Neurocirugía avanz...

 Doctor's articles

Resección de tumores con fluorescencia: detectar el tejido afectado por un tumor cerebral
Resección de tumores con fluorescencia...

 Credentials

GMC: ‍291804437

 Professional experience

• More than 30 years of experience
• Chief of Neurosurgery. Regional Universitario Carlos Haya Hospital in Malaga.
• Chief of Neurosurgery. Chiron hospitals Malaga and Marbella
• Director. Advanced Institute of Neurosurgery Arraez

 ...

 Positions in public associations

• Academic of the Royal Academy of Medicine and Surgery of Eastern Andalucia
• Corresponding Member of the Royal Academy of Medicine and Surgery
• Assistant treasurer. Administrative Council of the World Federation of Neurosurgical Societies (2005-2009)
• Treasurer. Administrative Council of the World Federation of Neurosurgical Societies (2009-2011)
• Coordinator of committee activities. World Federation of Neurosurgical Societies (2013-2017)
• President of the Organizing Committee. Annual meeting of the Society of University Neurosurgeons (2013)
• Secretary of the Spanish Society of Neurosurgery (2007-2010)
• Vice President of the Spanish Society of Neurosurgery (2013-2015)
• Member of the Board of the Spanish Society of Skull Base (2000- 2004)
• President of the Spanish Society of Skull Base (2002-2004) editor for the Journal of International Spain Neurosciences magazine EDITOR Gliomat
• Reviewer. Journal of Neurosurgical Sciences

 ...

 Teaching posts

• Associate Professor of Neurosurgery. Department of Surgery. School of Medicine. University of Málaga
• Visiting professor. University of Miami (2012)
• Visiting professor. University of Louisiana (2013)
• Honorary professor. Burdenko Institute. Moscow (2013)

 ...

 Education

• Degree in Medicine from the University of Granada (1981)
• Doctor degree with cum laude. Thesis: "Prognostic factors in supratentorial astrocytic malignant gliomas in adults." University of Granada. (July, 1989)

 Publications and conferences

• Spain Editor for the Journal of International Neurosciences
• Gliomat magazine publisher member of the Advisory Panel and International Liaison of the journal Neurosurgery

 Professional membership

• Member of the Editorial Board. Journal Neurosurgical Review
• Member of the Editorial Board. Journal World Neurosurgery
• Elected member of the American Academy of Neurological Surgeons
• Elected member of the World Academy of Neurological Surgeons
• Member of the Advisory Panel and International Liaison of the journal Neurosurgery
• Member of the Editorial Board. Journal Neurosurgical Review
• Member of the Editorial Board. Journal World Neurosurgery
• Member of the Editorial Board of the journal Neurosurgery
• Member of the Editorial Board of the journal Neurosurgery

 ...

Languages spoken

  • Spanish
  • English

*Translated with Google translator. We apologize for any imperfection

Patient reviews for Dr. Miguel Ángel Arráez Sánchez

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Patient reviews

Verified Patient
16/07/2018

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Patients comments

Me llamaron antes para reconfirmar la cita. no hubo tiempo de espera. el trato humano del doctor y el personal que nos atendió lo mejor de todo.

Reply to patient's comment
Muchísimas gracias por el comentario; estamos para servir y encantados de atenderle.Un cordial saludo,Miguel Angel Arraez

Verified Patient
28/06/2018

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Patients comments

Absolutamente buena en trato personal como todo lo demas

Reply to patient's comment
Muchísimas gracias por su comentario! Esperamos haberle podido ayudar.Un cordial saludo,Miguel Angel Arráez

Verified Patient
12/06/2018

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Patients comments

Excelente profesional. atención y trato exquisito. gracias dr. arraez.

Reply to patient's comment
Muchísimas gracias por su comentario y por confiar en nosotros! Siempre a su disposición,Dr. Arráez

Verified Patient
20/02/2016

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Diseases, Medical Tests and Treatments

Abnormalities of the craniocervical junction

They are bone alterations of the occipital bone, the foramen magnum or the first two cervical vertebrae. These anomalies decrease the virtual space oc ...

Brain Cancers

  Brain tumors are formed because of the proliferation of cells that grow and multiply abnormally in the brain, being able to give blood vessels, c ...

Cervical disc herniation

The herniated disc is the compression of the spinal cord or nerve root that occurs when a portion of an intervertebral disc moves. Hernias usually aff ...

Cranial Surgery

It is any intervention that treats problems in the brain and surrounding structures. It may be necessary to intervene a tumor, bleeding from trauma, b ...

Lumbar disc herniation

  Lumbar disc hernia is an injury caused by degeneration or wear of the intervertebral discs of the spine, which act as shock absorbers between the vertebrae. Lumbar hernia is one of the most common and causes compression or irritation of the nerve root, which often just manifesting as sciatic nerve pain, depending on the position and size of the hernia. The main causes of herniated discs are articulate aging, trauma or prolonged exertion. In addition, there are risk factors that favor its appearance, such as obesity, sedentary lifestyle or snuff. Treatment varies depending on the severity of the case, and can be solved with temporary resting, drug administration, rehabilitation exercises or even surgery, it indicated only for patients who do not respond to other treatments and the pain persists markedly. A herniated disc L4 the level of injury when the pain radiates from the front of the thigh, no loss of sensation in the inside of the leg and foot, and causes weakness in the knee. L5 level of injury occurs when the pain radiates down the back of the thigh and there is a loss of sensation in the side wall of the calf and the back of the foot. Therefore, disc herniation L4 and L5 can be distinguished by the symptoms they cause. ...

Spinal surgery

The spine surgery is to correct structural abnormalities of the spine that cause pain. It is indicated in cases where there is significant compression of the spinal cord or nerve roots, and when it is due undoubtedly to the structural abnormality detected. One of those treated by surgery of cervical spine injury is a herniated disc. Cervical surgery may be necessary to reduce pressure on the spinal cord or nerve roots, when pain is caused by a herniated disc or a bone of spinal canal. Trauma surgery may also be required to stabilize the cervical spine and minimize the possibility of paralysis, when a fracture or dislocation causes a vertebral instability. Likewise, cervical surgery is also used in case of degenerative diseases. ...

Acoustic neuroma

Auditory or acoustic neuroma neuroma is a tumor that forms in the inner ear conductor. Despite being a benign tumor it is aggressive because when diagnosed in its early stages is not done, is growing in size and can reach compressing neural structures. Symptoms usually begin with a ringing or tinnitus on the side of the tumor which is accompanied by a gradual loss of hearing. In extreme cases the ear neurinoma can generate a hearing loss of the affected side. In most cases, it must be surgically removed. ...

Acoustic neuroma surgery

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Aneurysm

Aneurysms are dilatations of the arteries due to a fault in the vessel wall which triggers an increase in diameter and carries the risk of rupture and massive internal bleeding. Most cerebral aneurysms are congenital, but can also be traumatic, tumor cause, arteriosclerosis, by common infectious cause or drug consumption. Depending on the shape of the aneurysm are divided into secular, fusiform, and use as side; They may also be classified by size. All aneurysms may be complicated by rupture of the vessel and cause bleeding in the brain, causing a stroke acidente, which can cause irreversible nerve damage. Aneurysms are asymptomatic, symptoms only when they break, causing intense headaches, nausea, vomiting, stiff neck, seizures or sudden loss of consciousness. For diagnosis, several tests such as angiography or CT are used, and the treatment depends on the size of the aneurysm and associated risk factors. There are several alternatives for both conservative and surgical treatment, which must evaluate a neurosurgeon. ...

Arthroplasty

Our joints are continuously exposed to multiple injuries, there arises arthroplasty. Arthroplasty is a surgical procedure that is performed to restore mobility and its ordinary function. ...

Bone marrow cancers

A spinal tumor is abnormal growth in or around the spinal cord cells, with leukemia, lymphoma and myeloma tumors the most common nervous system. To affect such an important location for the human body, its symptoms cause neurological defects such as loss of sensitivity and strength, lack of control over the sphincters and back pain. It is very important to diagnose the medullary tumors of the nervous system in time to prevent the column from spreading and causing secondary spinal tumors or finish affecting other parts of the body. Its diagnosis can carry out a review of reflexes and muscle tenderness and a neurological examination. As their first symptoms are discovered, you must start as soon as possible a suitable and personalized treatment to prevent resulting in permanent injury. Corticosteroids, surgery and chemotherapy have been very beneficial to cure or ameliorate disease. ...

Brain aneurysm

Aneurysms are dilatations of the arteries due to a fault in the vessel wall which triggers an increase in diameter and carries the risk of rupture and massive internal bleeding. A cerebral aneurysm, also known as intracranial aneurysm is a bulge in a blood vessel in the brain. It can be congenital, but they can also be traumatic cause, tumor, for arteriosclerosis, by common infectious cause or drug consumption. Depending on the shape of the aneurysm are divided into secular, fusiform, and use as side; They may also be classified by size. All aneurysms may be complicated by rupture of the vessel and cause bleeding in the brain, causing a stroke acidente, which can cause irreversible nerve damage. Aneurysms are asymptomatic, symptoms only when they break, causing intense headaches, nausea, vomiting, stiff neck, seizures or sudden loss of consciousness. For diagnosis, several tests such as angiography or CT are used, and the treatment depends on the size of the aneurysm and associated risk factors. There are several alternatives for both conservative and surgical treatment, which must evaluate a neurosurgeon. ...

Brain hemorrhage

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Canal stenosis

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Chiari Malformation

The Arnold-Chiari malformation is a congenital defect characterized because the cerebellum (the part of the brain that controls balance) projects and comes to occupy part of the space for the spinal cord. In many cases, it occurs because of not having enough space. Although sometimes might not have any symptoms and goes unnoticed throughout life, Chiari malformation, can obstruct proper circulation of the cerebrospinal fluid, which makes communication between the brain and the rest of the body. Consequently, Chiari disease causes significant motor difficulties. Currently, the only treatment to correct their effects and stop its evolution is the cranial surgery. ...

Column Tumors

It is the growth of a cell mass in the vertebrae. Cancerous tumors that originate in the spine are rare, but the column is commonplace to other cancers that spread. One in four cancer patients will develop a tumor that metastasizes to the spine and cause pain and injury. However, not all tumors are cancerous column. ...

Craneo fracture

A skull fracture is a break in one or more bones of the skull, charged with protecting the brain, nerves, blood vessels and the inner ear. Although this is a very strong part of the body and is quite difficult to break the skull fracture can occur from falls, car accidents, some kind of physical aggression or head injuries. Among the clearest symptoms include: bleeding from the wound, which may be accompanied by bleeding ear, nose and eyes; hematomas; variations in the size of the pupils; confusion, imbalance, nausea, unconsciousness and headache. Therefore, when a person receives a blow on the head it is best to visit as soon as possible to a doctor to diagnose the extent of it and treatment, if necessary. ...

Cranial Endoscopy

Cranial endoscopy is a technique increasingly used in neurosurgery, being a little invasive to access the cranial cavity through an endoscope procedure. Through small holes in the body can be accessed with the endoscopic device to it to carry out different types of surgeries that were previously much more complicated operations and requiring completely open the skull. Also, thanks to the endoscope can be displayed hidden spaces of the brain, in all angles, making it very useful for interventions such as those to treat ulnar nerve entrapment (which occurs in the elbow). By using the endoscope in this operation it is accomplished the final scar is much smaller than in conventional procedures. ...

Craniosynostosis

Craniosynostosis is a birth defect in which a premature closure of one or more of the sutures between the bones of the skull of a baby occurs. The skull of an infant is made up of bony plates that are responsible for growth of the skull, but when these plates intersect are generated saturate, causing the head to grow abnormally.     ...

Diathermocoagulation

The diathermocoagulation is a diathermy type consisting of a therapeutic method of cauterizing tissue or heating based on the use of different high frequency current for coagulation cell treated area. Generally this treatment is used in various types of disorders or diseases: surgery and is applied in various treatments such as deep tissue removal or excision of cervical polyps, as well as the destruction of some pathological structures which can be generated in different organs such as the bladder, digestive tract, etc; dermatology used for repairing various skin lesions such as warts, or destruction of angiomas, warts, fibroids, among others. The advantages of this technique is that it manages coagulation and removing tissue causing minimal damage to the surrounding areas. ...

Disc prosthesis

The disc prosthesis is implanted artificial disc between two vertebrae in the natural disc substitution of a person, whose flexible structure acts as a load distributor point and allows the harmonic motion of the spine. To replace the disc with a prosthesis of lumbar disc to encourage mobility, the use of prosthetic surgery is required. In addition, there are two types of dentures: full, made of steel (sometimes with a plastic part) replacing all components of the disk; and partial, that only replaces the disc nucleus is formed and various plastics. Lumbar disc prosthesis is being used increasingly in some patients with severe back pain (degenerative disc disease). ...

Discectomy

The diskectomy is a surgery that is performed when the patient has a herniated disk in one of his spine. That is, when the pad to help separate the vertebrae (bones of the spine) has emerged, wholly or partially, from its place. This causes back pain that spreads to the legs and causes severe muscle weakness. The surgical procedure can remove part or all of this pad to end the pain. To carried out the surgery (which takes about two hours) hospitalization and spinal or general anesthesia is required. The specialist makes a cut in the back and through a microscope, locate damaged discs; once removed, suture the wound with stitches or staples. ...

Endoscopic naso & sinus surgery

Encompasses all interventions from inside the nose, visualizando or manipulating the structures through optical instruments. Its obejtivo treat injuries or abnormalities that alter the normal function of the nose, or its adjoining structures. ...

Endoscopic Skull Base Surgery

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Epilepsy

Epilepsy is a disorder characterized by sudden onset of recurrent seizures that are usually diagnosed by testing (EEG and MRI) to determine its cause. According to the diagnosis, treatment can be pharmacological, dietary, surgical or avoidance of stimuli that trigger epileptic episodes. This disease can affect people of all ages and appear at any time. Anyway, it is more common childhood epilepsy that appears in children under five, sometimes causing changes in behavior and learning, apart from the typical seizures of epileptic seizures. In addition, there are different types of epilepsy according to its severity and cause. Among the most curious is photosensitive epilepsy, caused by exposure to flashing lights and high intensity, such as computer screens and video games. ...

Epilepsy Surgery

Epilepsy surgery is a procedure that is performed when patients with epilepsy not adequately respond to drugs, which happens approximately 20% of cases. That is why their quality of life is severely affected by this ailment. The surgical technique used to depend on each patient and involves removing the part of the brain that produces these seizures provided that this is not brain areas necessary for the proper functioning of the body is injured. It should be noted that there is also a benign tumor called acoustic neuroma, grows in the nerve connecting the ear to the brain, and can cause epileptic outbreaks, which should not be confused with this disease suffer chronically. Having said tumor removed by surgery, causing symptoms disappear forever. ...

Hydrocephalus

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Intracranial hematomas

It is an accumulation of blood in the brain surface. Usually the result of a serious head injury. This often results in brain injury and can cause death. ...

Laminectomy

The spinal column consists of 33 vertebrae that protect the spinal cord, so-called separated by intervertebral discs. When one of these discs is compressed, it can be fragmented and press on a nerve of the spinal cord, causing pain of varying severity depending on the location of the damaged disc. The lumbar laminectomy is a surgical procedure for the removal of part of the vertebra that is causing pressure on the spinal nerves or spinal cord to relieve pain it causes. The most common surgery is called laminectomy lumbar decompressive laminectomy, and involves removing the blade vertebra, increasing the space for the nerves in the spinal canal. In contrast, the posterior cervical laminectomy is the procedure in which the surgeon makes an incision in the back half of the neck to remove the blade of a bone vertebral arch, which depending on the case will require the removal of the entire damaged disk or a part. ...

lumbar fusion

The fixation of the lumbar spine is a type recommended for the treatment of fractures, degenerative instability, tumors and other medical conditions that prevent lumbar spine surgery is stable. This is the latest hopeful as when other treatments (such as belts, massage, postural improvement measures, anti-inflammatory and acquisition of appropriate weight) have not borne fruit. Is the assessment of the lumbar spine using bone grafts from the patient to be placed with the help of metal implants, among which the pedicle screws. It is a delicate surgery that usually takes four to six hours and is performed mostly under general anesthesia. It specifies rehabilitation intervention complementary to surgery. ...

Malformations of the nervous system

Congenital malformations of the central nervous system are related to alterations in the neural tube, which most institutions neurosurgical treatment, disrafismos and craniosynostosis, abnormal neuronal proliferation and megalencefalias microcephaly, abnormal migration include neuronal, lissencephaly, pachygyria, schizencephaly, agenesis of the corpus callosum, heterotopias and cortical dysplasias, spinal cord injuries and spinal malformations dysraphias. ...

Minimally invasive spine surgery

One of the biggest problems of spine surgery are multiple incisions that must be made to reach this part of the body and, therefore, the subsequent scarring, a large blood loss and long-term interventions. Therefore, every time is often used more surgery minimally invasive spine, whenever possible as sequelae resulting are smaller, smaller scars, damage to the muscle mass is minimal and achieves rapid recovery patient. Furthermore, the results of such operations are the same as traditional surgery. Therefore, the minimally invasive spine surgery is most recommended for patients provided they are suitable so that she could make features. ...

Movement disorders

  Movement disorders encompass all neurological diseases and abnormalities involving alterations in speed and coordination of the movement of a person. In most cases, the original is movement disorders by a dysfunction of the basal ganglia and various diseases in different brain areas, but also may be due to injury caused by autoimmune diseases or the administration of some drugs. Depending on the cause of every movement disorder, the treatment will be different and personalized, although in most cases it is only intended to relieve symptoms. There are different types of movement disorders, depending on the degree of involvement and their characteristics: hypokinetic, where the movement is reduced; or hyperkinetic, causing excessive involuntary activity. As tics and tremors. Some of the best known diseases is Parkinson's disease, the restless legs syndrome, or ataxia. ...

Nervous System

The nervous system is a network of tissue whose function is to quickly capture and process signals to control and coordinate all body organs. So, I gra timely and effective interaction with the changing environment. Its basic unit are neurons, specialized cells whose function is to coordinate the actions of the body through chemical and electrical signals sent from the other end joins the body. ...

Neuropathic pain

Neuropathic pain occurs by the presence of an injury or disease of the peripheral or central nervous system. Neuropathy can be painless, just as pain can exist without evidence of nerve injury. Neuropathic pain, therefore, can be defined as an unpleasant sensation or emotional experience associated with dysfunction or nervous system injury. In addition, next to the neurological pain, many patients suffer from insomnia, constipation, loss of appetite, anxiety, vomiting, weakness or discomfort in the mouth. Besides, the peripheral neuropathic pain or chronic neuropathic pain is the result of damage to peripheral nerves that usually cause numbness and pain in the hands and feet, and tingling or burning. ...

Neurostimulation and Brain Stimulation

Neurostimulation works by intercepting pain signals before they reach the brain. For this, a small system is implanted in the body. The system, similar to a heart pacemaker, is used to replace the pain of a different feel. Some people describe the feeling as a gentle massage or in some cases merely the absence of pain. ...

Neurostimulation core

Medullary neurostimulation is a technique suitable for the treatment of chronic, neuropathic and lumbar, or pain of migraines. It involves the application of an electric field to get nervous interrupt the transmission of pain to the affected area system. The treatment is performed by a generator through electrodes placed on the skin of the treatment area, it transmits following peripheral nerve impulses. These electrical impulses are designed to relieve pain without creating a muscle spasm. Therefore, the intensity, frequency and current amplitude in each treatment adapted according to requirements and to treat symptoms of each patient. ...

OCD (obsessive compulsive disorder) surgery

Obsessive-compulsive disorder (OCD) is an anxiety disorder characterized by the presence of distressing thoughts (obsessions) and recurrent and stereotyped behaviors (compulsions) behaviors persistently over time, causing anxiety and impairment of daily life. Depending on the severity of OCD, many patients are treated by combining psychotherapy with antidepressant prescription drugs. But in some patients this therapy is not effective, in which case the call TOC surgery, consisting of stimulation of certain areas of the brain to control neurotransmitter imbalance causing this disorder is performed. To this end, radio frequency waves that produce a continuous and rhythmic discharge are used. ...

Pediatric Neurosurgery

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Rhizotomy

Rhizolysis is a noninvasive surgical technique to address back pain through several punctures in the area of ​​the spine to be treated without hospitalization. Rhizolysis involves destruction by radiofrequency pulses of nerve endings that transmit pain originating in the joints that connect two vertebrae sí.La rhizotomy is performed in the operating room with the patient lying face down (in the case of rhizolysis lumbar and dorsal rhizotomy) or lying face up (in case of neck pain). This treatment is indicated in cases of pain caused by movement in which not affected the nerves exiting the spine to the limbs. ...

Second medical opinion

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Spina bifida

Spina bifida, also known as spinal dysraphia, is a birth defect that causes incomplete development of the spinal cord or the membranes that cover it. This disease is characterized by the fetal spine does not close completely during pregnancy, so it is often caused neurological damage in the spinal cord, which may entail different consequences: partial paralysis of the legs, hydrocephalus, difficulties learning, etc. This disease has no cure but there are treatments designed to correct or improve the complications that entails. Depending on the patient, the therapy may be based on drugs, surgery or physical therapy. Anyway, to prevent spina bifida in babies, doctors recommend the mother taking folic acid during early pregnancy. This risk is reduced that the baby is born with this disease. ...

Spinal Endoscopy

Spinal endoscopy is one of the techniques used in interventions called minimally invasive surgery. This method allows surgeons to operate herniated discs, spinal stenosis and other diseases using a thin tube into which is built a small camera and optical instrumentation that allows for minimal incisions to perform the operations. By connecting the endoscope camera with a high resolution monitors, surgeons have a view of the surgical site with all kinds of detail and can perform detailed operations with minimal incisions and patient discomfort. Currently, the use of this technique is increasingly widespread operations disc, spinal stenosis and other diseases. ...

spinal fusion

Spinal fusion is a surgical procedure to treat degenerative diseases of the spine. The fusion consists in fixing two bone parts rigidly and irreversibly anchoring a joint using screws, plates and titanium rods. Its aim is to stabilize the spine to relieve local pain. In addition, decompression of the nerve roots relieves sciatic pain and difficulty walking, typical of stenosis, or narrowing of the spinal canal. The technique of spinal fusion is divided into anterior cervical fusion, posterior cervical arthrodesis and posterior lumbar spine fusion. The spinal fusion is performed in the operating room under general anesthesia. ...

Tethered spinal cord

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Vascular malformations

It's a birthmark or a congenital malformation that is made up of veins, capillaries, arteries and lymph vessels. There are different types of vascular malformations that differ in function of the affected blood vessel. Are persententes from birth and increase its size parallel to the birth of the child. ...

Vertebral fixation with browser

The spinal fixation involves the placement of screws into the vertebrae to fix them, whether cervical, thoracic or lumbar level. This surgery may have GPS navigation, which allows these implants with a high success rate of 97.6%. In addition, navigation avoids the risks of conventional techniques such as nerve injuries, and causes unnecessary second interventions by poor positioning of the screws. To perform this surgery, use a computer and some optical cameras that allow, through the introduction of a preoperative CT images and X-rays taken of the actual position of the surgical patient, a merger of these 3D images converting real- virtual. Through a special instrument, we can visualize in direct path of the screws. Besides browsing this surgery also we perform monitoring of the nerves in relation to the vertebral segment that is already involved through a computer get the electrical recording of the muscles innervated by these nerves. In the event of a possible irritation or nerve damage, the computer warns us by a volley of abnormal waves and an acoustic signal, which can rectify the trajectory of a screw avoiding injuries. ...

Vertebroplasty

Vertebroplasty is a minimally invasive procedure for treating acute spinal fractures. In vertebroplasty a cement mixture into the fractured bone is injected through a hollow needle. Typically, vertebroplasty is recommended when have failed other less invasive treatments (such as rest a back support or analgesics) or when medications have begun to cause unwanted side effects such as ulcers or stomach problems. ...

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Other information: of Dr.Prof. Miguel Ángel Arráez Sánchez

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