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Physiotherapy Apr 1975
Topics: Diathermy; Humans; Microwaves
PubMed: 1161844
DOI: No ID Found -
Annual Review of Medicine 1976
Review
Topics: Animals; Blood Transfusion; Diathermy; Embryo, Mammalian; Eye Injuries; Female; Hot Temperature; Humans; Male; Microwaves; Pacemaker, Artificial; Pregnancy; Testis
PubMed: 779592
DOI: 10.1146/annurev.me.27.020176.000545 -
BJOG : An International Journal of... Jan 2005To compare the effectiveness of two second generation endometrial ablation techniques (microwave and thermal balloon endometrial ablation) with first generation... (Comparative Study)
Comparative Study Review
OBJECTIVE
To compare the effectiveness of two second generation endometrial ablation techniques (microwave and thermal balloon endometrial ablation) with first generation techniques of endometrial ablation to treat heavy menstrual bleeding in women.
SEARCH STRATEGY
We searched the Cochrane Library (issue 3, 2002), the National Research Register, MEDLINE (1966 to August 2002), Embase (1980 to August 2002) and Web of Science Proceedings (all years). We also searched reference lists and contacted experts and manufacturers in the field.
SELECTION CRITERIA
Randomised controlled trials and controlled trials of microwave endometrial ablation and thermal balloon endometrial ablation versus transcervical resection and rollerball ablation, alone or in combination, to treat heavy menstrual bleeding were included.
DATA COLLECTION AND ANALYSIS
Two reviewers independently selected studies for inclusion and extracted data. As there was considerable clinical and methodological heterogeneity among the studies, meta-analysis was not undertaken and results are presented descriptively.
RESULTS
Two randomised controlled trials of microwave endometrial ablation and eight trials (six randomised controlled trials) of thermal balloon endometrial ablation were included in the review. No significant differences were found between first and second generation techniques in terms of amenorrhoea, bleeding patterns, pre-menstrual symptoms, patient satisfaction or quality of life. Microwave endometrial ablation and thermal balloon endometrial ablation had significantly shorter operating and theatre times than first generation techniques. Adverse effects were few with all techniques, but there were fewer peri-operative adverse effects with second generation techniques.
CONCLUSION
Microwave endometrial ablation and thermal balloon endometrial ablation are alternatives to first generation techniques for treating heavy menstrual bleeding. No head-to-head trials of microwave endometrial ablation and thermal balloon endometrial ablation have been undertaken and there is not yet enough evidence of differences in clinical effectiveness between these two techniques.
Topics: Catheter Ablation; Catheterization; Clinical Trials as Topic; Female; Humans; Hyperthermia, Induced; Menorrhagia; Microwaves; Randomized Controlled Trials as Topic
PubMed: 15663392
DOI: 10.1111/j.1471-0528.2005.00449.x -
International Journal of Hyperthermia :... Nov 2004The common condition of atrial fibrillation is often treated by cutting diseased cardiac tissue to disrupt abnormal electrical conduction pathways. Heating abnormal... (Review)
Review
The common condition of atrial fibrillation is often treated by cutting diseased cardiac tissue to disrupt abnormal electrical conduction pathways. Heating abnormal tissue with electromagnetic power provides a minimally invasive surgical alternative to treat these cardiac arrhythmias. Radio frequency ablation has become the method of choice of many physicians. Recently, microwave power has also been shown to have great therapeutic benefit in medical treatment requiring precise heating of biological tissue. Since microwave power tends to be deposited throughout the volume of biological media, microwave heating offers advantages over other heating modalities that tend to heat primarily the contacting surface. It is also possible to heat a deeper volume of tissue with more precise control using microwaves than with purely thermal conduction or RF electrode heating. Microwave Cardiac Ablation (MCA) is used to treat heart tissue that allows abnormal electrical conduction by heating it to the point of inactivation. Microwave antennas that fit within catheter systems can be positioned close to diseased tissue. Specialized antenna designs that unfurl from the catheter within the heart can then radiate specifically shaped fields, which overcome problems such as excessive surface heating at the contact point. The state of the art in MCA is reviewed in this paper and a novel catheter-based unfurling wide aperture antenna is described. This antenna consists of the centre conductor of a coaxial line, shaped into a spiral and insulated from blood and tissue by a non-conductive fluid filled balloon. Initially stretched straight inside a catheter for transluminal guiding, once in place at the cardiac target, the coiled spiral antenna is advanced into the inflated balloon. Power is applied in the range of 50-150 W at the reserved industrial, scientific and medical (ISM) frequency of 915 MHz for 30-90 s to create an irreversible lesion. The antenna is then retracted back into the catheter for removal. Simulated and experimental measurements on phantoms, in vitro animal organ tissue and living animals have shown that these microwave applicators deliver the intended therapeutic lesions that are both wider and deeper than those generated by RF ablation or other recently reported microwave applicators.
Topics: Animals; Catheter Ablation; Equipment Design; Heart; Humans; Hyperthermia, Induced; Microwaves
PubMed: 15675671
DOI: 10.1080/02656730412331286885 -
Critical Reviews in Bioengineering 1981
Topics: Animals; Biomedical Engineering; Biophysical Phenomena; Biophysics; Body Temperature; Hot Temperature; Humans; Hyperthermia, Induced; Microwaves; Neoplasms; Thermometers
PubMed: 7226862
DOI: No ID Found -
Journal of Vascular and Interventional... Aug 2010Microwave ablation uses dielectric hysteresis to produce direct volume heating of tissue. Microwaves are capable of propagating through many tissue types, even those... (Review)
Review
Microwave ablation uses dielectric hysteresis to produce direct volume heating of tissue. Microwaves are capable of propagating through many tissue types, even those with high impedance such as lung or bone, with less susceptibility to "heat-sink" effects along vessels. Microwaves are highly conducive to the use of multiple applicators, showing the synergy seen with other energies, but also the potential capability for phasing of the electromagnetic field. As a result, larger, more customizable ablation zones may be created in less time. Although multiple microwave ablation systems are currently available, further study and continued development are needed.
Topics: Catheter Ablation; Equipment Design; Humans; Microwaves; Neoplasms; Radiography; Treatment Outcome
PubMed: 20656229
DOI: 10.1016/j.jvir.2010.04.007 -
The Journal of Microwave Power Jun 1976
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Journal of Cancer Research and Clinical... Dec 2011Liver metastases are the major cause of mortality in patients with gastrointestinal carcinomas and other malignant tumors, carrying a poor prognosis and presenting... (Review)
Review
Liver metastases are the major cause of mortality in patients with gastrointestinal carcinomas and other malignant tumors, carrying a poor prognosis and presenting considerable management. Surgical resection remains the only curative therapy for liver metastases up to now. However, only a small percentage of patients are suitable for curative resection due to many factors: multi-centric tumors, extrahepatic metastases, early vascular invasion, and coexisting advanced liver cirrhosis. In non-surgical cases, regional interventional therapies have led to a major break through in the treatment of unresectable liver metastases, which include transarterial chemoembolization (TACE), radiofrequency ablation (RFA), laser-induced thermotherapy (LITT), cryosurgical ablation (CSA), microwave coagulation therapy (MCT), percutaneous ethanol injection (PEI), and others. As a result of the technical development of locoregional approaches for unresectable liver metastases during recent decades, the range of combined interventional therapies has been continuously enlarged. The current roles of these treatment options for liver metastases are discussed in this review.
Topics: Catheter Ablation; Chemoembolization, Therapeutic; Cryosurgery; Ethanol; Humans; Hyperthermia, Induced; Injections; Liver Neoplasms; Microwaves
PubMed: 21909952
DOI: 10.1007/s00432-011-1026-9 -
Techniques in Urology Dec 2000
Topics: Aged; Humans; Hyperthermia, Induced; Male; Microwaves; Middle Aged; Prostatic Hyperplasia; Urethra
PubMed: 11108558
DOI: No ID Found -
Journal of Magnetic Resonance Imaging :... Feb 2008MRI has proven to be a very reliable diagnostic tool in the detection and differential diagnosis of breast lesions. Some lesions are, even in retrospect, not detectable... (Review)
Review
MRI has proven to be a very reliable diagnostic tool in the detection and differential diagnosis of breast lesions. Some lesions are, even in retrospect, not detectable in x-ray or ultrasound images but MRI is able to detect lesions at a much smaller size than the average size of lesions depicted by x-ray and ultrasound. The aim in the future is to develop combined procedures where imaging, biopsy, and interventional therapies are combined in a single outpatient procedure. As a step toward this goal different interventional procedures are useful that include interstitial laser therapy (ILT), radiofrequency ablation (RFA), high-intensity focused ultrasound (HIFU), microwave ablation therapy, and cryotherapy. In this overview the main features and initial results of these procedures are described and discussed.
Topics: Breast; Breast Neoplasms; Catheter Ablation; Cryotherapy; Diagnosis, Differential; Female; Humans; Magnetic Resonance Imaging, Interventional; Microwaves; Minimally Invasive Surgical Procedures; Ultrasonic Therapy
PubMed: 18219688
DOI: 10.1002/jmri.21276