Biomedical subjects

Tohru Morioka

Publications and source records attributed to Tohru Morioka.

3 recordsLinked to original sources

PubMed2004

[Lever type push-pull device for ACD-CPR].

Prolonged use of the CardioPump can cause fatigue and may impair performing the ACD-CPR maneuver accurately. We applied a lever mechanism to lessen the fatigue. The fixed part of the lever consists of a 40 cm metal pipe, 2 cm in diameter, mounted vertically to a rectangular metal base plate (45 cm x 20 cm) placed under the patient when the device is used. The fulcrum of the lever is positioned at any height on the vertical tube. One end of the 65 cm lever was connected to a pin-joint hub at the fulcrum. The height of the fulcrum is adjusted for each patient according to the anterior-posterior dimension of the thorax. The Cardio-Pump is mounted in a frame which is movable along the shaft of the lever between the fulcrum and the handle at the operator end of the lever. ACD-CPR is performed by lowering and raising the handle. The range of motion is controlled for safety by observing the movement of the chest wall of the patient from the side. We were able to maintain ACD-CPR with this device for more than 30 minutes without significant fatigue.

Cardiopulmonary Resuscitation↗

PubMed2004

[A suction bottle for post-anesthesia evaluation of the distribution of consumed carbon dioxide absorber granules in the canister].

Anesthetic methods, apparatus, and respiratory care patterns have changed greatly in the past several decades. New scrutiny must be applied to patterns of carbon dioxide absorber consumption in the canisters in anesthesia circuits. Fine examination may be performed by extracting absorber granules by suction to avoid jumbling the granules in the canister. However, a general surgical suction apparatus has too narrow suction tubes, a low flow volume and too large reservoir bottles. We constructed a reservoir bottle of 1.5 l to trap the granules. The bottle is closed with an easily removable lid penetrated by inlet (with a larger diameter) and outlet cannulas. A conventional heat and moisture exchange filter is affixed to the outlet to prevent contamination of the suction system by alkaline absorber dust. Suction may be applied by a vacuum cleaner with a higher flow rate. Traditional recommendation to use baffles along the inside wall of the canister to prevent "channeling of exhaled gases by the wall effect" may turn out to be misleading.

Anesthesia↗

PubMed2002

[A portable sternal compressor for cardiac massage on a patient carried by a litter--Part 3: Applicability of the device tested by a recording manikin].

Effects of a portable sternal compressor developed by us was examined by 43 medical students (28 males and 15 females) and 9 anesthesia residents using a recording manikin. Compression over a depth of 3.5 to 5.0 cm was classified as adequate. First, the examinee held the device affixed in front of the chest with a belt hanged over the shoulder and pulled the other handle back and forth at a rate of 100 per minute. The male students could perform adequate compression in 92% of the total number of compression in the first one minute, while female students could in 65%. Though the anesthesia residents accomplished 99% of success rate in the first one minute, the rate fell to nearly 80% in the next minute and about 50% thereafter due to fatigue. When one handle was sustained on the floor with its fold-in stand and held between the knees of the examinee sitting on a chair, adequate compression was performed with the success rate of over 80% for 5 minutes. We conclude this device will be useful for cardiac massage on a patient either transported on a litter or lying on a soft bed.

Adult↗