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International Journal of Hyperthermia :... Jun 2013Microwave tissue heating is being increasingly utilised in several medical applications, including focal tumour ablation, cardiac ablation, haemostasis and resection... (Review)
Review
Microwave tissue heating is being increasingly utilised in several medical applications, including focal tumour ablation, cardiac ablation, haemostasis and resection assistance. Computational modelling of microwave ablations is a precise and repeatable technique that can assist with microwave system design, treatment planning and procedural analysis. Advances in coupling temperature and water content to electrical and thermal properties, along with tissue contraction, have led to increasingly accurate computational models. Developments in experimental validation have led to broader acceptability and applicability of these newer models. This review will discuss the basic theory, current trends and future direction of computational modelling of microwave ablations.
Topics: Computer Simulation; Humans; Hyperthermia, Induced; Microwaves; Models, Biological; Neoplasms
PubMed: 23738698
DOI: 10.3109/02656736.2013.799295 -
Nihon Rinsho. Japanese Journal of... May 1996Recently, microwave coagulation has been in the spotlight for its local application on tumor necrosis with sufficient effects. We introduce here percutaneous microwave... (Review)
Review
Recently, microwave coagulation has been in the spotlight for its local application on tumor necrosis with sufficient effects. We introduce here percutaneous microwave coagulation therapy (PMCT) and endoscopic microwave coagulo-necrotic therapy (endo. MCN) for small hepatocellular carcinoma.
Topics: Carcinoma, Hepatocellular; Electrocoagulation; Endoscopy; Humans; Liver Neoplasms; Microwaves
PubMed: 8965362
DOI: No ID Found -
The Journal of International Medical... Aug 2019This study was performed to review the current evidence for the efficacy of shortwave and microwave diathermy in promoting nerve regeneration after peripheral nerve... (Review)
Review
OBJECTIVE
This study was performed to review the current evidence for the efficacy of shortwave and microwave diathermy in promoting nerve regeneration after peripheral nerve injuries in both animal models and human patients.
METHODS
An extensive literature search was conducted without publication data restrictions. Studies including the intervention and outcome in animal or human models were selected. Non-English studies, reviews, letters, and case reports were excluded.
RESULTS
Eleven articles were included in this study. Shortwave diathermy at the frequency of 27.12 or 40.68 MHz was used in six of seven animal studies, while only one study utilized microwave diathermy at 915 MHz. Seven animal experiments demonstrated that shortwave or microwave diathermy produces an increased myelinated nerve fiber number, myelin sheath thickness, and axon diameter as well as improved electrophysiological parameters and locomotion. A total of 128 patients (207 wrists) were enrolled in four clinical studies. The clinical use of diathermy in human patients with carpal tunnel syndrome showed positive effects on pain, hand function, and electrophysiological findings.
CONCLUSIONS
Shortwave or microwave diathermy can improve the electrophysiological parameters, myelinated fiber number, and axon diameter of the injured nerve.
Topics: Animals; Diathermy; Disease Models, Animal; Humans; Microwaves; Peripheral Nervous System Diseases; Short-Wave Therapy
PubMed: 31304815
DOI: 10.1177/0300060519854905 -
Journal of B.U.ON. : Official Journal... 2015To explore the value of artificial hydrothorax microwave coagulation combined with transcatheter arterial chemoembolization (TACE) therapy in the treatment of...
PURPOSE
To explore the value of artificial hydrothorax microwave coagulation combined with transcatheter arterial chemoembolization (TACE) therapy in the treatment of ultrasound-invisible malignant tumors in the hepatic dome (mainly hepatocellular carcinoma/HCC) and the perioperative care for the patients.
METHODS
Sixty-eight patients with malignant liver tumors in the hepatic dome were treated with a combination therapy of TACE and microwave coagulation via an artificially induced hydrothorax. Their perioperative condition was under close observation and the nursing care was intensified. Paracentesis of the chest was successfully carried out via the positioning of ultrasound and guidance of microwave to the tumor site, so that the tumor could be treated with cold cycle microwave coagulation therapy.
RESULTS
After treatment, 3/68 patients (4.4%) achieved complete tumor ablation, while 59/68 (86.8%) achieved tumor ablation >50% or tumor shrinkage >30%. Another 6/68 patients (8.8%) achieved tumor ablation <50% or tumor shrinkage <30%. Of 45 patients, 42 (93.3%) obtained a reduction of AFP level >50% post-therapy, 28/37 patients (75.7%) achieved a reduction of CEA level >50%, 23/29 patients (79.3%) achieved a reduction of CA19-9 level> 50%; 3/68 patients (4.4%) survived for 4 to 6 months, 31/68 (45.6%) survived >6 months and 34/68 (50%) survived >12 months. No bleeding, liver failure, infection or needle tract seeding occurred after the operation, and no treatment-related deaths occurred.
CONCLUSION
Microwave coagulation combined with TACE for HCC in the hepatic dome is safe and effective. Perioperative observation and nursing care can not only reduce the complications but also improve the therapeutic effect and the patient quality of life.
Topics: Carcinoma, Hepatocellular; Chemoembolization, Therapeutic; Combined Modality Therapy; Female; Humans; Liver Neoplasms; Male; Microwaves; Perioperative Care
PubMed: 26416053
DOI: No ID Found -
Kyobu Geka. the Japanese Journal of... Jul 2009Photodynamic therapy (PDT), neodymium yttrium aluminum garnet (Nd-YAG) laser therapy, electrocautery and microwave coagulation therapy are therapeutic options available... (Review)
Review
Photodynamic therapy (PDT), neodymium yttrium aluminum garnet (Nd-YAG) laser therapy, electrocautery and microwave coagulation therapy are therapeutic options available for management of endobronchial malignancies. All of these treatment modalities have been used for both palliation of late obstructing cancers, and more recently have been used as primary treatment of early stage lung cancers. Only PDT has the curative potential for patients with early superficial squamous cell carcinoma. Nd-YAG laser therapy is used for direct thermal ablation of tissue in endobronchial malignancy. This equipment is the most widely used type of laser for bronchoscopic interventions because it has sufficient power to vaporize tissues and produces an excellent coagulation effect. But the risks of perforation and bleeding are high. Endobronchial electrocautery is the use of high-frequency electrical current that generates heat due to tissue resistance, resulting in destruction of tissue. Argon plasma coagulation (APC) is a form of noncontact electrocoagulation. The risks of perforation and igniting are much lower than with the Nd-YAG laser therapy. Microwave coagulation therapy refers to the use of all electromagnetic methods for inducing tumor destruction by using devices with frequencies of 2450 MHz. It is important to select these treatment methods appropriately according to each case.
Topics: Bronchial Neoplasms; Humans; Laser Therapy; Microwaves; Photochemotherapy
PubMed: 20715702
DOI: No ID Found -
Wiener Medizinische Wochenschrift (1946) Mar 1956
Topics: Diathermy; Humans; Microwaves; Pain Management
PubMed: 13325490
DOI: No ID Found -
Voprosy Kurortologii, Fizioterapii, I... 1982
Topics: Equipment and Supplies; Humans; Methods; Microwaves; Postoperative Care; Radiotherapy Dosage; USSR
PubMed: 7090259
DOI: No ID Found -
BZB. Bayerisches Zahnarzteblatt Apr 1967
Topics: Dentistry; Microwaves; Radiotherapy
PubMed: 4962080
DOI: No ID Found -
Urologic Nursing Jun 1997
Review
Topics: Diathermy; Humans; Male; Microwaves; Patient Education as Topic; Prostatic Hyperplasia
PubMed: 9239138
DOI: No ID Found -
The Cochrane Database of Systematic... Sep 2012Transurethral resection of the prostate (TURP) has been the gold-standard treatment for alleviating urinary symptoms and improving urinary flow in men with symptomatic... (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
Transurethral resection of the prostate (TURP) has been the gold-standard treatment for alleviating urinary symptoms and improving urinary flow in men with symptomatic benign prostatic hyperplasia (BPH). However, the morbidity of TURP approaches 20%, and less invasive techniques have been developed for treating BPH. Preliminary data suggest that microwave thermotherapy, which delivers microwave energy to produce coagulation necrosis in prostatic tissue, is a safe, effective treatment for BPH.
OBJECTIVES
To assess the therapeutic efficacy and safety of microwave thermotherapy techniques for treating men with symptomatic benign prostatic obstruction.
SEARCH METHODS
Randomized controlled trials were identified from The Cochrane Library, MEDLINE, EMBASE, bibliographies of retrieved articles, reviews, technical reports, and by contacting relevant expert trialists and microwave manufacturers.
SELECTION CRITERIA
All randomized controlled trials evaluating transurethral microwave thermotherapy (TUMT) for men with symptomatic BPH were eligible for this review. Comparison groups could include transurethral resection of the prostate, minimally invasive prostatectomy techniques, sham thermotherapy procedures, and medications. Outcome measures included urinary symptoms, urinary function, prostate volume, mortality, morbidity, and retreatment. Two review authors independently identified potentially relevant abstracts and then assessed the full papers for inclusion.
DATA COLLECTION AND ANALYSIS
Two review authors independently abstracted study design, baseline characteristics, and outcomes data and assessed methodological quality using a standard form. We attempted to obtain missing data from authors or sponsors, or both.
MAIN RESULTS
In this update, we identified no new randomized comparisons of TUMT that provided evaluable effectiveness data. Fifteen studies involving 1585 patients met the inclusion criteria, including six comparisons of microwave thermotherapy with TURP, eight comparisons with sham thermotherapy procedures, and one comparison with an alpha-blocker. Study durations ranged from 3 to 60 months. The mean age of participants was 66.8 years and the baseline symptom scores and urinary flow rates, which did not differ across treatment groups, demonstrated moderately severe lower urinary tract symptoms. The pooled mean urinary symptom scores decreased by 65% with TUMT and by 77% with TURP. The weighted mean difference (WMD) with 95% confidence interval (CI) for the International Prostate Symptom Score (IPSS) was -1.00 (95% CI -2.03 to -0.03), favoring TURP. The pooled mean peak urinary flow increased by 70% with TUMT and by 119% with TURP. The WMD for peak urinary flow was 5.08 mL/s (95% CI 3.88 to 6.28 mL/s), favoring TURP. Compared to TURP, TUMT was associated with decreased risks for retrograde ejaculation, treatment for strictures, hematuria, blood transfusions, and the transurethral resection syndrome, but increased risks for dysuria, urinary retention, and retreatment for BPH symptoms. Microwave thermotherapy improved IPSS symptom scores (WMD -5.15, 95% CI -4.26 to -6.04) and peak urinary flow (WMD 2.01 mL/s, 95% CI 0.85 to 3.16) compared with sham procedures. Microwave thermotherapy also improved IPSS symptom scores (WMD -4.20, 95% CI -3.15 to -5.25) and peak urinary flow (WMD 2.30 mL/s, 95% CI 1.47 to 3.13) in the one comparison with alpha-blockers. No studies evaluated the effects of symptom duration, patient characteristics, prostate-specific antigen levels, or prostate volume on treatment response.
AUTHORS' CONCLUSIONS
Microwave thermotherapy techniques are effective alternatives to TURP and alpha-blockers for treating symptomatic BPH in men with no history of urinary retention or previous prostate procedures and prostate volumes between 30 to 100 mL. However, TURP provided greater symptom score and urinary flow improvements and reduced the need for subsequent BPH treatments compared to TUMT. Small sample sizes and differences in study design limit comparisons between devices with different designs and energy levels. The effects of symptom duration, patient characteristics, or prostate volume on treatment response are unknown.
Topics: Adrenergic alpha-Antagonists; Aged; Humans; Hyperthermia, Induced; Male; Microwaves; Prostatic Hyperplasia; Randomized Controlled Trials as Topic; Transurethral Resection of Prostate
PubMed: 22972068
DOI: 10.1002/14651858.CD004135.pub3