Comparison between two defibrillation waveforms.

Two defibrillation waveforms, the chopped biphasic pulses and the constant current pulses, were assessed and compared. Two indices are introduced. The first one is the ratio between the delivered energy W and the energy W(0) of a rectangular pulse with the same duration and electric charge.

Electrodelivery of drugs into cancer cells in the presence of poloxamer 188.

In the present study it is shown that poloxamer 188, added before or immediately after an electrical pulse used for electroporation, decreases the number of dead cells and at the same time does not reduce the number of reversible electropores through which small molecules (cisplatin, bleomycin, or propidium iodide) can pass/diffuse. It was suggested that hydrophobic sections of poloxamer 188 molecules are incorporated into the edges of pores and that their hydrophilic parts act as brushy pore structures. The formation of brushy pores may reduce the expansion of pores and delay the irreversible electropermeability.

Electrochemotherapy treatment for bilateral pleomorphic rhabdomyosarcoma in a cat.

A 13-year-old male neutered cat was presented for the sudden growth of two nodular lesions close to the upper eyelid of both eyes. Fine-needle aspiration cytology was suggestive of mesenchymal neoplasia. The cat had conservative surgical excision in order to preserve the eyelids' functionality; however, the histopathological report came with a diagnosis of incompletely excised bilateral pleomorphic rhabdomyosarcoma.

Electrochemotherapy-induced radiation recall in a cat.

Electrochemotherapy is gaining popularity for the treatment of malignancies of companion animals due to its efficacy and low cost. In this paper, we describe the successful treatment of a recurring fibrosarcoma in a cat by using cisplatin selectively driven within the tumor cells by trains of biphasic pulses. The cat's tumor did not recur over the following five months, however the cat did experience severe erythema at the site of previous irradiation, followed by moist desquamation and ulcer that required debridement and prolonged therapy with steroids and antihistaminic drugs.

Biphasic pulses enhance bleomycin efficacy in a spontaneous canine genital tumor model of chemoresistance: Sticker sarcoma.

Sticker's sarcoma (also known as transmissible venereal tumor) is a horizontally transmitted neoplasm of the dog, that is passed with coitus. It is a locally aggressive tumor with a low tendency to metastatic spread. The most common locations are the genitals, the nose, the perianal area.

Digital lock-in techniques for adaptive power-line interference extraction.

This paper presents a simple digital approach for adaptive power-line (PL) or other periodic interference extraction. By means of two digital square (or sine) wave mixers, the real and imaginary parts of the interference are found, and the interference waveform is synthesized and finally subtracted. The described technique can be implemented in an open-loop architecture where the interference is synthesized as a complex sinusoid or in a closed-loop architecture for automatic phase and gain control.

Successful rescue of an apocrine gland carcinoma metastatic to the cervical lymph nodes by mitoxantrone coupled with trains of permeabilizing electrical pulses (electrochemotherapy).

Canine apocrine gland carcinoma is a locally aggressive neoplasm that can occasionally lead to metastatic spread, thus mimicking the behavior of their human counterpart. In this paper we describe the successful treatment of a cervical metastatic spread of this neoplasia by using mitoxantrone selectively driven within the tumor cells by trains of biphasic pulses. The dog experienced tumor reduction from the first cycle of electrochemotherapy (ECT) and complete remission by the time of its fourth session.

Adjuvant electrochemotherapy for incompletely excised anal sac carcinoma in a dog.

Canine anal sac gland carcinoma (ASGC) is a frequently described neoplasm that is highly aggressive and can frequently lead to metastatic spread. In this paper, we describe the successful treatment of an incompletely excised ASGC by using cisplatin selectively driven within the tumor cells by trains of biphasic pulses. The dog received two courses of electrochemotherapy 14 days apart.

Biphasic pulses enhance bleomycin efficacy in a spontaneous canine perianal tumors model.

Perianal tumors (adenoma and carcinoma of the hepatoid glands) are frequently reported in veterinary literature. They are locally aggressive tumors with a low tendency to metastatic spread. An hormonal ethiology has been identified for the development of perianal adenomas in male dogs, while the carcinomas are free from hormonal influence.

Bootstrapped two-electrode biosignal amplifier.

Portable biomedical instrumentation has become an important part of diagnostic and treatment instrumentation. Low-voltage and low-power tendencies prevail. A two-electrode biopotential amplifier, designed for low-supply voltage (2.

Local control and distant metastasis after electrochemotherapy of a canine anal melanoma.

Canine anal melanoma is an aggressive neoplasm that rapidly leads to constipation in dogs, thus mimicking the behavior of their human counterpart. In this paper, the successful local palliation of this neoplasm is described using cisplatin selectively driven within the tumor cells by trains of biphasic pulses. The dog experienced tumor reduction with restoration of normal defecation for three months, then experienced massive dissemination to the sublumbar lymph nodes that led to intestinal obstruction and euthanasia.

Adjuvant electrochemotherapy for the treatment of incompletely excised spontaneous canine sarcomas.

Electrochemotherapy (ECT) is a new therapeutical technique that combines the administration of trains of biphasic pulses with the local application of poorly permeant anticancer molecules, thus obtaining increased chemotherapy uptake. The purpose of this study was to prospectively assess the adjuvant potentialities of ECT for the treatment of different incompletely excised canine sarcomas. Twenty-two privately owned dogs with incomplete surgical excision of high grade sarcomas were treated with bleomycin injected within the tumor bed (1.

Electrochemotherapy for localized lymphoma: a preliminary study in companion animals.

Non Hogdkin's lymphoma is the commonest malignant neoplasm in humans and in pets. Treatments include systemic chemotherapy eventually combined with radiation therapy. Radiation therapy is also used as single agent for the treatment of localized lymphoma (LSA).

Ganglioneuroblastoma in a cat: a rare neoplasm treated with electrochemotherapy.

An 8-year-old male castrated cat was referred for sudden onset of lameness. Physical examination revealed a 1x2x1cm mass originating from a footpad of the right hind leg. A diagnosis of ganglioneuroblastoma was suggested by the tumour appearance following histopathological staining with haematoxylin and eosin and haematoxylin/van Gieson.

Electrochemotherapy for the treatment of squamous cell carcinoma in cats: a preliminary report.

Squamous cell carcinomas (SCC) of the skin are commonly described in cats. Reported treatments include surgery, radiation therapy and photodynamic therapy. This preliminary study reports on the management of these lesions combining the local administration of bleomycin (plus hyaluronidase for a more uniform distribution) with permeabilizing biphasic electric pulses.

Transthoracic impedance study with large self-adhesive electrodes in two conventional positions for defibrillation.

External defibrillation requires the application of high voltage electrical impulses via large external electrodes, placed on selected locations on the thorax surface. The position of the electrodes is one of the major determinants of the transthoracic impedance (TTI) which influences the intracardiac current flow during electric shock and defibrillation success. The variety of factors which influence TTI measurements raised our interest to investigate the range of TTI values and the temporal TTI variance during long-term application of defibrillation self-adhesive electrodes in two conventional positions on the patient's chest--position 1 (sub-clavicular/sub-axillar position) and position 2 (antero-posterior position).

Simple two-electrode biosignal amplifier.

A simple, cost effective circuit for a two-electrode non-differential biopotential amplifier is proposed. It uses a 'virtual ground' transimpedance amplifier and a parallel RC network for input common mode current equalisation, while the signal input impedance preserves its high value. With this innovative interface circuit, a simple non-inverting amplifier fully emulates high CMRR differential.