Mandibular Prosthesis Implantation
Maxillofacial Prosthesis Implantation
Prostheses and Implants
Heart Valve Prosthesis
Heart Valve Prosthesis Implantation
Blood Vessel Prosthesis Implantation
Dental Prosthesis, Implant-Supported
Embryo Implantation, Delayed
Blood Vessel Prosthesis
Lens Implantation, Intraocular
Aortic Valve Stenosis
Community Health Centers
Delivery of Health Care
Health Care Costs
Animal experimental implantation of an atrial septal defect occluder system. (1/868)OBJECTIVE: To establish the implantation technique for the atrial septal defect occluder system (ASDOS) device in an experimental animal model and to determine long term mechanical stability of the device and its in vivo properties in terms of biocompatibility and tissue reaction. MATERIALS AND METHODS: An atrial septal defect was created and the device implanted in 17 pigs (mean weight 30 kg). The implantation technique was refined and modified because of initial technical and anatomical complications during nine acute pilot studies. The technique proved to be feasible in eight subsequent survival studies. Four pigs were electively killed three months after implantation (group 1). The remaining four pigs were killed six months after implantation (group 2). RESULTS: Necropsy showed all devices were embedded in soft tissue three months after implantation. Microscopic examination of atrial septal tissue showed an acute granulomatous inflammatory reaction in group 1 and fibrosis in group 2. The intensity of the inflammatory reaction around the device was clearly milder in group 2, indicating a decline in the inflammatory response with time. Clinical and biochemical investigations indicated acceptable biocompatibility of the device. CONCLUSION: The implantation technique for the ASDOS device in a chronic pig model has been established. Biocompatibility of the device was acceptable. (+info)
Transdermal photopolymerization for minimally invasive implantation. (2/868)Photopolymerizations are widely used in medicine to create polymer networks for use in applications such as bone restorations and coatings for artificial implants. These photopolymerizations occur by directly exposing materials to light in "open" environments such as the oral cavity or during invasive procedures such as surgery. We hypothesized that light, which penetrates tissue including skin, could cause a photopolymerization indirectly. Liquid materials then could be injected s.c. and solidified by exposing the exterior surface of the skin to light. To test this hypothesis, the penetration of UVA and visible light through skin was studied. Modeling predicted the feasibility of transdermal polymerization with only 2 min of light exposure required to photopolymerize an implant underneath human skin. To establish the validity of these modeling studies, transdermal photopolymerization first was applied to tissue engineering by using "injectable" cartilage as a model system. Polymer/chondrocyte constructs were injected s.c. and transdermally photopolymerized. Implants harvested at 2, 4, and 7 weeks demonstrated collagen and proteoglycan production and histology with tissue structure comparable to native neocartilage. To further examine this phenomenon and test the applicability of transdermal photopolymerization for drug release devices, albumin, a model protein, was released for 1 week from photopolymerized hydrogels. With further study, transdermal photpolymerization potentially could be used to create a variety of new, minimally invasive surgical procedures in applications ranging from plastic and orthopedic surgery to tissue engineering and drug delivery. (+info)
Transcatheter closure of a mid-muscular ventricular septal defect with an amplatzer VSD occluder device. (3/868)A 5 year old girl with a haemodynamically significant mid-muscular ventricular septal defect (VSD) had successful transcatheter closure using the Amplatzer VSD occluder. This device passes through a small diameter sheath and can be easily retrieved or repositioned. These properties may make it a suitable device for closure of large mid-muscular defects in small children. (+info)
Limb salvage surgery in bone tumour with modular endoprosthesis. (4/868)Thirty-three patients with bone tumours were treated by resection of the growth and reconstruction with a Kotz modular endoprosthesis. The average follow-up was for 50 months, ranging from 14 to 79 months. At the last review, 12 patients (36%) had died due to the tumour and 9 others (27%) had metastases. All 4 patients with proximal tibial reconstruction had poor functional results, due to an extension lag or to knee stiffness. Four of the six tumours of the proximal femur were complicated by local recurrence or dislocation of the hip, and had poor or fair functional results. Of the patients with distal femoral reconstruction, 17 out of 22 had excellent or good functional results. Reconstruction with a modular prosthesis after resection of a tumour gives excellent or good functional results in more than three-fourths of the cases of distal femur reconstruction, but it should be used with caution in the proximal tibia and proximal femur. (+info)
Transcatheter closure of muscular ventricular septal defects with the amplatzer ventricular septal defect occluder: initial clinical applications in children. (5/868)OBJECTIVES: The aim of this study was to close muscular ventricular septal defects (MVSDs) in children, with a new device, the Amplatzer ventricular septal defect occluder (AVSDO). BACKGROUND: The design of previously used devices for transcatheter closure of MVSDs is not ideal for this purpose and their use has been limited by several drawbacks. METHODS: Six patients, aged 3 to 10 years, with MVSDs underwent transcatheter closure using the AVSDO. The device is a modified self-centering and repositionable Amplatzer device that consists of two low profile disks made of Nitinol wire mesh with a 7-mm connecting waist. The prosthesis size (connecting waist diameter) was chosen according to the measured balloon stretched VSD diameters. A 6-F or 7-F sheath was used for the delivery of the AVSDO. Fluoroscopy and transesophageal echocardiography were utilized for optimal guidance. RESULTS: The location of the defect was midmuscular in five patients and beneath the pulmonary valve in one. The balloon stretched MVSD diameter ranged from 6 to 11 mm. Device placement was successful in all patients, and complete occlusion occurred in all six patients (95% confidence interval 54.06% to 100%). Two patients developed transient complete left bundle branch block. No other complications were observed. CONCLUSIONS: This encouraging initial clinical success indicates that the AVSDO is a promising device for transcatheter closure of MVSDs in children. Further clinical trials and longer follow-up are needed before the widespread use of this technique can be recommended. (+info)
Improved survival rates support left ventricular assist device implantation early after myocardial infarction. (6/868)OBJECTIVES: Implantation of left ventricular assist devices (LVADs) early after acute myocardial infarction (MI) has traditionally been thought to be associated with high mortality rates due to technical limitations and severe end-organ dysfunction. At some experienced centers, doctors have refrained from earlier operation after MI to allow for a period of hemodynamic and end-organ stabilization. METHODS: We retrospectively investigated the effect of preoperative MI on the survival rates of 25 patients who received a Thermocardiosystems Incorporated LVAD either <2 weeks (Early) (n = 15) or >2 weeks (Late) (n = 10) after MI. Outcome variables included perioperative right ventricular assistance (and right-sided circulatory failure), hemodynamic indexes, percent transplanted or explanted, and mortality. RESULTS: No statistically significant differences were demonstrated between demographic, perioperative or hemodynamic variables between the Early and Late groups. Patients in the Early group demonstrated a lower rate of perioperative mechanical right ventricular assistance, but had a higher rate of perioperative inhaled nitric oxide use. In addition, 67% of patients in the Early group survived to transplantation and 7% to explantation, findings comparable to those in the Late group (60% and 0% respectively). CONCLUSIONS: This clinical experience suggests that patients may have comparable outcomes whether implanted early or late after acute MI. These data therefore support the early identification and timely application of this modality in post-MI LVAD candidates, as this strategy may also reveal a subgroup of patients for whom post-MI temporary LVAD insertion may allow for full ventricular recovery. (+info)
Artificial disc replacement with the modular type SB Charite III: 2-year results in 50 prospectively studied patients. (7/868)The Modular Type SB Charite disc prosthesis has been developed as a device for artificial disc replacement (ADR) in patients with symptomatic discopathies. Here, we report on our first series of 50 (out of 350) patients, who had a satisfactory clinical result in 70% of cases (2 years' follow-up). Subgroup analysis revealed that patients with an isolated discopathy without previous spinal operations or other pathology at the same or other spinal level benefitted more from the surgery. However, this technique was associated with some problems: a 13% rate of permanent side-effects and/or complications was observed caused by the anterior approach. Four percent were related to poor implantation technique. There were no problems related to the material of the prosthesis. Twelve patients needed re-operation, but this was beneficial in only three of them. In one patient we had to convert to an interbody fusion. We conclude that in patients with severe isolated symptomatic discopathies that are resistant to conservative treatment, a mobile disc prosthesis is worth considering as a real alternative to a spondylodesis. However, accurate patient selection is imperative. With these criteria we were encouraged by our results to continue the implantation of this artificial disc. (+info)
Long-term histological and electrophysiological results of an inactive epiretinal electrode array implantation in dogs. (8/868)PURPOSE: Short-term pattern electrical stimulation of the retina via multielectrode arrays in humans blind from photoreceptor loss has shown that ambulatory vision and limited character recognition is possible. To develop an implantable retinal prosthesis that would provide useful vision, these results need to be sustained over a prolonged period of retinal electrical stimulation. As a first step toward this goal, the biocompatibility and the feasibility of surgically implanting an electrically inactive electrode array onto the retinal surface was tested. METHODS: A 5 x 5 electrode array (25 platinum disc-shaped electrodes in a silicone matrix) was implanted onto the retinal surface using retinal tacks in each of the 4 mixed-breed sighted dogs. Color fundus photography, fluorescein angiography, electroretinography, and visual evoked potentials were obtained preoperatively, at 1-week intervals for 2 weeks postoperatively, then at 2-week intervals up to 2 months postoperatively, and thereafter at 1-month intervals. One dog was killed at 2 months after implantation and a second dog after 3 months of implantation. Histologic evaluation of the retinas was performed. The remaining two dogs continue to be followed beyond 6 months after the implantation surgery. RESULTS: No retinal detachment, infection, or uncontrolled intraocular bleeding occurred in any of the animals. Retinal tacks and the retinal array remained firmly affixed to the retina throughout the follow-up period. Hyperpigmentation of the retinal pigment epithelium was observed only around the site of retinal tack insertion. No fibrous encapsulation of the implant or intraocular inflammation was visible. A- and b-wave amplitudes of the electroretinogram were depressed at the first postoperative week testing but recovered over the ensuing 1 week and were not statistically different from the normal unoperated fellow eye throughout the postoperative period. N1 and P1 wave amplitudes of the visual evoked potentials were not significantly different from the normal fellow eyes at any of the postoperative test intervals. Fluorescein angiography showed that the entire retina including the area under the electrode array remained well perfused. Similarly, histologic evaluation revealed near total preservation of the retina underlying the electrode array. CONCLUSIONS: Implantation of an electrode array on the epiretinal side (i.e., side closest to the ganglion cell layer) is surgically feasible, with insignificant damage to the underlying retina. The platinum and silicone arrays as well as the metal tacks are biocompatible. With the success of implanting an electrically inactive device onto the retinal surface for prolonged periods, the effects of long-term retinal electrical stimulation are now ready to be tested as the next step toward developing a prototype retinal prosthesis for human use. (+info)
There are several potential causes of ED, including:
1. Aging: As men age, the blood vessels that supply the penis with blood can become less responsive, leading to ED.
2. Heart disease: Men with heart disease are at a higher risk for developing ED.
3. Diabetes: Men with diabetes are also at a higher risk for developing ED.
4. Prostate surgery or treatment: Surgery or treatment for prostate cancer can sometimes cause ED.
5. Medications: Certain medications, such as antidepressants and blood pressure drugs, can cause ED as a side effect.
6. Lifestyle factors: Factors such as smoking, excessive alcohol consumption, and a lack of exercise can contribute to ED.
7. Psychological factors: Psychological factors such as stress, anxiety, and relationship issues can also contribute to ED.
8. Neurological disorders: Certain neurological disorders, such as multiple sclerosis or Parkinson's disease, can cause ED.
9. Peyronie's disease: A condition in which scar tissue inside the penis causes it to curve and become less responsive to stimulation.
10. Trauma: Injury to the penis or nerves that control erections can cause ED.
11. Venous leak: A condition in which the veins that empty blood from the penis are damaged, leading to a weak or inconsistent erection.
There are several treatment options available for ED, including:
1. Medications: Drugs such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra) can help improve blood flow to the penis and achieve an erection.
2. Vacuum constriction devices: These devices are placed over the penis and use vacuum pressure to increase blood flow and create an erection.
3. Penile injections: Alprostadil (Caverject) is a medication that can be injected into the penis to increase blood flow and achieve an erection.
4. Penile implants: A surgically implanted device that can be inflated with saline solution to create an erection.
5. Lifestyle changes: Improving physical activity, losing weight, quitting smoking, and reducing stress can help improve blood flow and reduce the risk of ED.
6. Counseling and therapy: Addressing relationship issues or psychological factors that may be contributing to ED can also be helpful.
It's important to note that ED is a common condition and can affect men of all ages and backgrounds. If you are experiencing erectile dysfunction, it's important to speak with a healthcare provider to determine the underlying cause and develop an appropriate treatment plan.
It is important to identify and address prosthesis failure early to prevent further complications and restore the functionality of the device. This may involve repairing or replacing the device, modifying the design, or changing the materials used in its construction. In some cases, surgical intervention may be necessary to correct issues related to the implantation of the prosthetic device.
Prosthesis failure can occur in various types of prosthetic devices, including joint replacements, dental implants, and orthotic devices. The causes of prosthesis failure can range from manufacturing defects to user error or improper maintenance. It is essential to have a comprehensive understanding of the factors contributing to prosthesis failure to develop effective solutions and improve patient outcomes.
In conclusion, prosthesis failure is a common issue that can significantly impact the quality of life of individuals who rely on prosthetic devices. Early identification and addressing of prosthesis failure are crucial to prevent further complications and restore functionality. A comprehensive understanding of the causes of prosthesis failure is necessary to develop effective solutions and improve patient outcomes.
There are several types of prosthesis-related infections, including:
1. Bacterial infections: These are the most common type of prosthesis-related infection and can occur around any type of implanted device. They are caused by bacteria that enter the body through a surgical incision or other opening.
2. Fungal infections: These types of infections are less common and typically occur in individuals who have a weakened immune system or who have been taking antibiotics for another infection.
3. Viral infections: These infections can occur around implanted devices, such as pacemakers, and are caused by viruses that enter the body through a surgical incision or other opening.
4. Parasitic infections: These types of infections are rare and occur when parasites, such as tapeworms, infect the implanted device or the surrounding tissue.
Prosthesis-related infections can cause a range of symptoms, including pain, swelling, redness, warmth, and fever. In severe cases, these infections can lead to sepsis, a potentially life-threatening condition that occurs when bacteria or other microorganisms enter the bloodstream.
Prosthesis-related infections are typically diagnosed through a combination of physical examination, imaging tests such as X-rays or CT scans, and laboratory tests to identify the type of microorganism causing the infection. Treatment typically involves antibiotics or other antimicrobial agents to eliminate the infection, and may also involve surgical removal of the infected implant.
Prevention is key in avoiding prosthesis-related infections. This includes proper wound care after surgery, keeping the surgical site clean and dry, and taking antibiotics as directed by your healthcare provider to prevent infection. Additionally, it is important to follow your healthcare provider's instructions for caring for your prosthesis, such as regularly cleaning and disinfecting the device and avoiding certain activities that may put excessive stress on the implant.
Overall, while prosthesis-related infections can be serious, prompt diagnosis and appropriate treatment can help to effectively manage these complications and prevent long-term damage or loss of function. It is important to work closely with your healthcare provider to monitor for signs of infection and take steps to prevent and manage any potential complications associated with your prosthesis.
Aortic valve stenosis can be caused by a variety of factors, including aging, calcium buildup, or congenital heart defects. It is typically diagnosed through echocardiography or cardiac catheterization. Treatment options for aortic valve stenosis include medications to manage symptoms, aortic valve replacement surgery, or transcatheter aortic valve replacement (TAVR), which is a minimally invasive procedure.
In TAVR, a thin tube is inserted through a blood vessel in the leg and guided to the heart, where it delivers a new aortic valve. This can be performed through a small incision in the chest or through a catheter inserted into the femoral artery.
While TAVR has become increasingly popular for treating aortic valve stenosis, it is not suitable for all patients and requires careful evaluation to determine the best course of treatment. It is important to discuss the risks and benefits of TAVR with a healthcare provider to determine the appropriate treatment plan for each individual patient.
Percutaneous aortic valve replacement
University of Rouen Normandy
Penile implants in spinal cord injury
Genital reconstructive surgery
List of MeSH codes (E04)
Culley C. Carson III
Argus retinal prosthesis
G. Patrick Maxwell
Pericardial heart valves
Tissue engineering of heart valves
Root canal treatment
Artificial heart valve
Aortic valve replacement
Surface chemistry of neural implants
Lumbar anterior root stimulator
Testicular Prosthesis Implantation
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Bicuspid. Medical search. Definitions
Penile prosthesis implantation3
- His poster "A randomized, double-blind, placebo-controlled study of dorsal penile nerve block (DPNB) prior to penile prosthesis implantation for post-operative pain control. (unc.edu)
- Professor Osama Shaeer is one of the most experienced surgeons in the field of surgical Andrology (penile prosthesis implantation for treating erectile dysfunction, correction of penile curvature, infertility surgery. (andrologyexpert.com)
- Among his publications are many innovative surgical techniques in Andrology, focused on management of difficult cases of penile prosthesis implantation, treatment of genital abnormalities and infertility. (andrologyexpert.com)
- A testicular prosthesis is an artificial implant that placed in an empty scrotum. (drmustafafarukusta.com)
- A testicular prosthesis will have the weight, shape and feel similar to a normal testicle. (drmustafafarukusta.com)
- When you're deciding to have this procedure, it's important to find a surgeon who specializes in testicular prosthesis implantation. (drmustafafarukusta.com)
AORTIC VALVE IMPLANTATION2
- Alozie Anthony, 謓er Alper, L鰏er Benjamin, Dohmen Pascal M. Minimally Invasive Direct Coronary Artery Bypass and Percutaneous Coronary Intervention Followed by Transcatheter Aortic Valve Implantation: A Promising Concept in High?risk Octogenarians. (who.int)
- Objectives: In this article, we present our initial clinical experience with staged minimally invasive direct coronary bypass (MIDCAB), percutaneous coronary intervention (PCI), and transcatheter aortic valve implantation (TAVI) in high?risk octogenarians (Hybrid). (who.int)
- She is an expert in pediatric retinal pathologies and retinal dystrophies, particularly in the surgical implantation of retinal prostheses and the subretinal administration of gene therapy. (ted.com)
- A penile prosthesis is the best surgical option for the treatment of men with erectile dysfunction. (medicaltourismitaly.com)
- A penile implantation can be performed on any patient suffering from organic Erectile Dysfunction (ED), as most of these problems fail to resolve spontaneously with non-surgical treatments. (medicaltourismitaly.com)
- In this work, we assess the current technology levels of retinal prosthesis devices (categorized by implant location), and then suggest possible directions for future retinal prosthesis devices. (elsevierpure.com)
- The idea is to implant the prosthesis in patients who need it for their severe symptoms, individualize each implant that is the best for that patient, and then take care of the prosthesis so that it lasts many years, following the instructions of its surgeon. (topdoctors.es)
- After the period of osseointegration, the definitive implant-supported dental prosthesis were fabricated. (bvsalud.org)
- These prosthesis are, therefore, suggested only in cases where there are limitations of manual ability of the patient or there are issues related to the high costs of implant. (medicaltourismitaly.com)
- The first ever technique in Andrology to remove Peyronie's disease and implant a penile prosthesis through a small incision and in a relatively very short time. (andrologyexpert.com)
- Postoperative hemorrhage from an endovascular AORTIC ANEURYSM repaired with endoluminal placement of stent grafts ( BLOOD VESSEL PROSTHESIS IMPLANTATION ). (nih.gov)
- Because manufacturers may supply implantable devices such as orthopedic (e.g., hip prostheses), cardiovascular (e.g., cardiac valve grafts), and neurologic (e.g., shunts) devices as nonsterile, hospital personnel must ensure that nonsterile devices are adequately sterilized before implantation. (cdc.gov)
- However, under certain circumstances, where the skin is broken or there is medical instrumentation, such as a prosthesis, of major surgery, they may become invasive and pathogenic. (justaskourdoctors.com)
- The implantation of a penile prosthesis is indicated in all the forms of erectile dysfunction that do not respond to other therapeutic aids, in cases in which drug treatments are contraindicated or might have led to the occurrence of relevant side effects. (medicaltourismitaly.com)
- The metal parts of the prosthesis are metal alloys, compatible with humans and resistant. (topdoctors.es)
- Elle a été désignée Jeune professionnelle de l'année par la Jeune Chambre de commerce de Montréal, en 2018, et élue dans le Canada's Top 40 Under 40, en 2019. (ted.com)
- In edentulous patients planning may be done using cephalometric analysis to determine the position of the teeth in the dental prosthesis, and consequently, those of the implants. (bvsalud.org)
- The objective of this study was to describe the clinical and etiological particularities of mechanical valve prostheses complications. (bvsalud.org)
- Clinical cases: five observations of patients presenting with a complication of mechanical valve prostheses collected in the cardiology department of the Libreville University Hospital Center during the period from January 2017 to December 2021, were reported. (bvsalud.org)
- Conclusion: These clinical cases highlight the difficulties related to the monitoring of long-term anticoagulation in patients with mechanical valve prosthesis in our context. (bvsalud.org)
- Two recent cases of postsurgical infection reported to CDC occurred after the implantation of devices labeled and sold as nonsterile. (cdc.gov)
- Complications observed were two cases of obstructive prosthesis thrombosis, a cerebrovascular stroke coming from microthrombosis, an infective endocarditis and a hemorrhagic accident under vitamin K antagonists. (bvsalud.org)
- The hip prosthesis is an intervention that is performed more and more often, due to the increase in the age of the population and the reasonable demand for quality of life by patients. (topdoctors.es)
- All 4 patients had both PCI/stenting and MIDCAB prior to deployment of the TAVI?prosthesis. (who.int)
- Conclusion : Ces cas cliniques mettent en exergue les difficultés liées au suivi de l'anticoagulation au long cours chez les patients porteurs de prothèse valvulaire mécanique dans notre contexte. (bvsalud.org)
- Ever since a visual prosthesis device demonstrated that electrical signals have the beneficial effect of generating phosphenes, their subsequent development has progressed rapidly. (elsevierpure.com)
- The recovery process takes place once the patient assumes the prosthesis as his own and begins to forget about it. (topdoctors.es)
- Adverse effects associated with implantation of implantable devices received from the manufacturer as nonsterile must be reported to the manufacturer, who must report the event to the FDA by mail (Center for Devices and Radiological Health, FDA, FDA User Report, P.O. Box 3002, Rockville, MD 20847-3002) or by fax ((301) 881-6670). (cdc.gov)