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At least 19 recordsLinked to original sources
PubMed1982

[Total hip-joint prosthesis. Critical long-term review of the new McKee Arden CAD stem prosthesis as compared with the usual McKee Arden prosthesis].

The article makes a comparison between the results of total arthroprosthesis operation of the hip with traditional Mckee Arden prosthesis (50 cases operated in the two-year period 1976-77) and those with the new McKee Arden model with C.A.D. stem (52 cases operated in the two-year period 1977-78). All operations were performed at the "G. Pini" Orthopaedic Institute by the same team and with the same surgical technique. The results are based mainly on three parameters (according to McKee): pain, amplitude of movement, and need to use supports. THe Authors conclude by stressing the efficiency of the new model of prosthesis and noting a decrease in intra and post-operative complications.

Adult↗
PubMed2001

[Voice restoration with voice prosthesis after total laryngectomy. Assessment of survival time of 378 Provox-1, Provox-2 and Blom-Singer voice prosthesis].

UNLABELLED: Voice Restoration with Voice Prosthesis after Total Laryngectomy. Assessment of Survival Time of 378 Provox-1, Provox-2 and Blom-Singer Voice Prosthesis. BACKGROUND: Indwelling voice prosthesis are used in Trier for voice restoration after total laryngectomy since 1991. OBJECTIVE AND METHOD: To assess the voice prosthesis survival times the patients of the years 1993-1999 are assessed retrospectively. PARTICIPANTS: 58 patients provided with indwelling voice prosthesis were seen regularly at follow-up. 378 prosthesis were changed. Provox 1, Provox 2 and Blom-Singer-Prostheses were used. RESULTS: The average survival lifetime of the prosthesis was 224 days for Provox-1, 96 days for Provox-2 and 107 days for Blom-Singer respectively. There is no significant difference found between Provox-2 and Blom-Singer Prosthesis. The survival times of the Provox-1 Prosthesis is significant longer. CONCLUSION: Using indwelling voice prosthesis for voice restoration after total laryngectomy an average survival time of the prosthesis of three months can be expected. There are relevant individual differences. Provox-1 Prosthesis have a significantly longer survival time, but as they are more difficult to handle they are not suitable for routine use. The indication for the choice between Blom-Singer or Provox-2 Prosthesis should be influenced by the surgeons' experience.

Adult↗
PubMed2003

External breast prosthesis use: experiences and views of women with breast cancer, breast care nurses, and prosthesis fitters.

After mastectomy, the provision of an appropriate breast prosthesis can help to improve body image and quality of life and reduce associated emotional distress. Although up to 90% of women use an external breast prosthesis after mastectomy, little is known about their experiences and satisfaction with breast prosthesis use. Focus groups were conducted with women who had been fitted with an external breast prosthesis, breast care nurses, and prosthesis fitters to explore women's experiences of prosthesis use. Qualitative thematic content analysis of focus group transcripts indicated that whereas women's initial reaction to the prosthesis generally was negative, this improved over time. Provision of adequate information and support, characteristics of the fitter and the fitting experience, and relationships with breast care nurses and prosthesis fitters were important to women's acceptance and satisfaction with their prosthesis. The study results highlighted the key role that breast care nurses play and the underestimation of the prosthesis fitter's role. Common themes concerning the impact of prosthesis use included body image, appearance, and feminine identity. These findings have important implications for professionals involved in the delivery of breast prostheses services.

Adaptation, Psychological↗
PubMed2002

[Mechanical ileus caused by a Provox voice prosthesis -- an "iatrogenic" enteral complication in voice prosthesis rehabilitation of laryngectomees].

BACKGROUND: During the exchange of a defect Provox-I voice prosthesis followed by an insertion of a Provox-II voice prosthesis the esophageal part of the prosthesis often is pushed into the esophagus, as the enteral passage of the prosthesis was thought to be less traumatic for the voice shunt in comparison to a complete extraction of the stiff esophageal flange through the tracheostoma. This procedure is also recommended in the users video of the ATOS company. CASE: A laryngectomized patient, in whom the change of the voice prosthesis was carried out pushing the esophageal flange of the prosthesis into the esophagus, developed a mechanical ileus, as the voice prosthesis got stuck in Bauhin's valve. This resulted in the necessity of a laparatomy for removal of the voice prosthesis. CONCLUSION: During the replacement of the Provox voice prosthesis it is necessary in all cases that the esophageal remnant of the voice prosthesis either is pulled out of the tracheoesophageal shunt via the tracheostoma or removed with a guide-wire transorally.

Aged↗
PubMed1997

Suspension effect and dynamic evaluation of the total surface bearing (TSB) trans-tibial prosthesis: a comparison with the patellar tendon bearing (PTB) trans-tibial prosthesis.

X-ray and cineradiography measurements were used to compare the suspension effect and stability of a TSB trans-tibial prosthesis with an Icelandic Roll-On Silicone Socket (ICEROSS) system to that of a PTB trans-tibial prosthesis. The suspension effect was measured by the distance between the tibia and the socket in both suspension position and weight-bearing position in both type of prostheses. The suspension effect of the TSB prosthesis (2.53 +/- 0.90 cm) was superior to that of the PTB prosthesis (3.60 +/- 0.56 cm) (p < 0.05) by x-ray measurement. The suspension effect of the TSB prosthesis (0.1, 0.4, 0.72 cm) was superior to that of the PTB prosthesis (0.3, 0.48, 1.03 cm) (p < 0.01, p < 0.05) by cineradiographic measurement. The stability was measured as the angle between the axis of the tibia and the prosthesis at the time of heel contact and toe off. The angle change of the TSB prosthesis was statistically smaller than that of the PTB prosthesis.

Adult↗
PubMed2000

Development of new tracheal prosthesis: autogenous mucosa-lined prosthesis made from polypropylene mesh.

Reliable tracheal or tissue graft has not been developed yet for the reconstruction of large, circumferential tracheal defects. Major limitations were anastomotic dehishence and stenosis, which were attributed to the poor epithelisation of the prosthetic graft. We developed a new tracheal prosthesis that has a viable lined and well-vascularized mucosa. The prosthesis consists of Prolene mesh reinforced with polypropylene rings, and is coated with gelatin. In addition, we lined the luminal surface of the prosthesis with transplanted autogenous oral mucosa and wrapped the prosthesis with greater omentum. Animal experiments were performed using 10 adult mongrel dogs. The transplanted mucosa and wrapped greater omentum tightly adhered to the prosthesis to make a single unit within two weeks. The mucosa survived well, was well vascularised by new vessels from greater omentum and showed normal histology. Complete surgical resection and replacement of a thoracic trachea (3 cm in length, 6 tracheal rings) were carried out in 2 dogs, which survived well with normal activity. We concluded that this highly biocompatible tracheal prosthesis could be very useful for step-wise reconstruction of tracheal defects.

Animals↗
PubMed1990

Surgical and prosthesis-related complications using the Groningen button voice prosthesis.

Prosthesis-assisted tracheoesophageal speech has advanced speech rehabilitation appreciably. However, the surgical technique and the use of a prosthesis may give rise to complications. In a retrospective study on 132 consecutive patients rehabilitated with a Groningen button voice prosthesis, the complications were assessed, the average follow-up being 21 months. Surgical complications were not observed. Prosthesis-related complications, which were encountered in 28%, were all of a minor nature and mainly consisted of granulation formation and hypertrophic scarring; these appeared to be easily treatable. The complications found were few and insignificant in comparison with reports in the literature. This may be attributed to the uncomplicated surgical procedure for the insertion of the Groningen button. Moreover, the prosthesis is self-retaining and requires hardly any care from the patient. Permanent removal of the prosthesis usually requires surgical closure, which is a simple procedure performed under local anaesthesia.

Female↗
PubMed1985

A study on the value of the modified KBM prosthesis compared with other types of prosthesis.

A study is reported on the value of a modified KBM prosthesis compared with other types of prostheses. Recently a new type of below-knee prosthesis (the so called modified KBM prosthesis) was introduced in the Netherlands. This prosthesis is now frequently used as a substitute for more conventional types. A study was carried out on the value of this new prosthesis, compared with the more conventional types, by means of a questionnaire sent to a group of patients who formerly used a more conventional type of prosthesis.

Adolescent↗
PubMed1981

Predicting aortic valve prosthesis size. A step toward better matching of patient and prosthesis.

We have developed a simple method of predicting aortic valve prosthesis size from supravalvular aortic cineangiograms, taken in the 30 degree right anterior oblique projection, during routine diagnostic cardiac catheterization. Measurements made on the aortogram were corrected to true size by means of a 1 cm2 grid reference plate filmed at the conclusion of the catheterization. This method was utilized prospectively to predict the anulus size in 26 patients undergoing aortic valve replacement alone or as part of a more extensive procedure. The catheterization prediction of anulus size was perfectly predictive of the prosthesis size used in eight of 26 (31%) cases, within 1 mm of the prosthesis size used in 20 of 26 (77%), and within one prosthesis size in all 26 (100%) cases. Comparing the measured anulus diameter to the actual prosthesis diameter yielded r = 0.93. When both systolic and diastolic frames were available for analysis, the diastolic frame was more accurately predictive than the systolic frame (diastolic r = 0.93; systolic r = 0.88), although both yielded acceptable results. Utilization of this method has significantly altered operative plans in four patients with a small anulus. Such preoperative assessment should allow improved matching of patient and valve prosthesis and thereby yield improved long-term results in aortic valve replacement.

Adult↗
PubMed1993

[Endoscopic prosthesis insertion in the palliative treatment of malignant esophageal stenosis. (Endoscopic esophageal prosthesis)].

We report our experience with endoscopic esophageal prosthesis in the treatment of 82 patients with advanced malignant oesophageal stenosis. The cause of the stenosis was an esophageal or esophagogastric cancer in 75 cases and a bronchogenic cancer in 7 patients. In 18 cases a tracheobronchial fistula was also present. A silicone tube (Atkinson) was used in 58 patients, a polyvinyl tube (Wilson-Cook) in 22 cases and a self-expanding tube in the remaining 2 patients. There was no technical failure in the insertion of the prosthesis. A normal feeding was possible in 71 of the 82 patients (86%) within 48 after the intubation. Major complications occurred in 8 cases (9.7%), 4 patients with esophageal perforation and 4 cases with aspiration bronchopneumonia. Postoperative mortality rate was 7.3%, one patient with perforation, 3 cases with aspiration bronchopneumonia and 2 patients with sepsis. The prosthesis partially displaced in 9 cases, but could be endoscopically replaced in all of them. The displacement of the prosthesis was complete in 3 patients, one of which needed a surgical procedure to remove the tube. The prosthesis was bunged up by a solid meal bolus in 4 cases, but an endoscopic procedure was successful in removing the bolus. Therapy with laser was necessary in two cases with self-expanding prosthesis obstructed by tumoral growth. We conclude that, in malignant esophageal stenosis, the endoscopic implantation of esophageal endoprosthesis is an effective, cheap and relatively safe palliative therapeutic alternative with a low postoperative mortality rate.

Adult↗
PubMed1994

Long-term experience with controlled expansion cylinders in the AMS 700CX inflatable penile prosthesis and comparison with earlier versions of the Scott inflatable penile prosthesis.

UNLABELLED: OBJECTIVEs. To determine complication and survival rates of the AMS 700CX penile prosthesis and to compare its reliability with earlier versions of the Scott inflatable penile prosthesis. METHODS: Retrospective chart review and telephone interviews were used. RESULTS: Actual 4-year survival of the AMS 700CX device was 85%, whereas earlier versions of the device had actual 4-year survival of 46% (p < 0.0001). The observed difference in prosthesis reliability could not be accounted for by differences in patient population, surgical technique, or incidence of infections. The most significant factor that contributed to improved prosthesis survival was the lack of cylinder complications (leaks and aneurysms). CONCLUSIONS: The controlled expansion cylinders of the AMS 700CX penile prosthesis are a significant advance in reliable, low-morbidity surgical therapy for impotence.

Actuarial Analysis↗
PubMed1997

New concepts -- biomechanical studies of a newly designed femoral prosthesis (cervico-trochanter prosthesis).

OBJECTIVE: A newly designed stemless (cervico-trochanter) prosthesis was developed for the purpose of reducing the incidence of the stress-shielding effect caused by the traditional stem-type prosthesis. DESIGN: Both mechanical test and three-dimensional finite element analysis were performed for comparing the differences of strain and stress distributions between the intact, C-T and PCA prosthetic femora. BACKGROUND: The stress-shielding effect and polyethylene (PE) wear debris were thought to be the main factors that resulted in local bone loss after the implantation of stem-type prostheses. In this study, we developed the new C-T prosthesis, which aimed to resolve the above-mentioned problems. METHODS: Six pairs of femora taken from human male cadavers were used to compare the strain magnitudes of intact (n = 12), C-T (n= 12) and PCA (n = 4) prosthetic femora in specific positions. Failure load tests of C-T (n = 8) and PCA (n = 12) prosthetic femora were also carried out from the load-displacement curve. The analysis of variance (ANOVA) test was used for statistical analysis. In addition, three-dimensional finite element stress analyses were performed using a commercial package, ANSYS, on a Convex 3810 computer. RESULTS: Both mechanical test and finite element results showed that the C-T prosthetic femora has a lower stress-shielding tendency than the PCA prosthetic femora (P < 0.001). The C-T prosthetic femora also withstood an average bearing load of 6312 N, which is greater than that of the PCA prosthesis at 5358 N (P < 0.01). CONCLUSIONS: The C-T prosthetic femur could withstand a higher failure load than the PCA prosthesis, which effectively reduced the incidence of the stress-shielding effect. Moreover, the particular design of the C-T prosthesis also reduced localized osteolysis because of the overall coverage of the neck-trochanteric area.

Journal Article↗
PubMed1996

The Nijdam voice prosthesis: a self-retaining valveless voice prosthesis for vocal rehabilitation after total laryngectomy.

Voice prosthesis-assisted speech rehabilitation after total laryngectomy has proven to be successful in the majority of patients and exceeds the results of traditional oesophageal speech. Nevertheless 10-30% failure rates are still reported. In part this is due to prosthesis-related problems, in particular ingrowth of Candida species in the valve-bearing parts of the devices. A new indwelling, low-resistance and valveless voice prosthesis is described; the Nijdam voice prosthesis. The device has an average device lifetime of 19 weeks which appears to be superior to other indwelling voice prostheses. Replacement indications mainly comprise leakage or increased airflow resistance. Most frequent local complications are granulation tissue and hypertrophic scar tissue formation. These occur in 12% of the patients and can easily be treated. Replacement is a simple outpatient procedure. The prosthesis is interchangeable with other types of indwelling voice prosthesis.

Equipment Design↗
PubMed1981

Functional effectiveness of a myo-electric prosthesis compared with a functional split-hook prosthesis: a single subject experiment.

The functional effectiveness of a myo-electric prosthesis with sensory feedback compared with that of a split-hook is described. Thirty independent observations were made on a single subject with a right below-elbow amputation wearing the myo-electric prosthesis and the split-hook prosthesis. Using a first order autoregressive model for making inferences about the two sets of data, the split-hook was found to be functionally better (p less than 0.001) than the myo-electric prosthesis. Functional effectiveness was defined operationally as scores on the Minnesota Rate of Manipulation Placing Test and the Smith Test of Hand Function. No predictions are made regarding the use of either prosthesis for other amputees. However clinical evidence suggested suitability of the myo-electric prosthesis with sensory feedback for some other functional tasks.

Adult↗