Response of the Lungs to Low Frequency Underwater Sound.

Rogers, Peter H.; Caille, Gary W.; Lewis, Thomas N.

doi:10.21236/ada299456

Cited by 4 publications

(3 citation statements)

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“…This was based on previous experience in which it is found that this treatment regimen was safe and most effective. 19,20 This frequency is similar to that used in the external vibrating device (the VEST) and higher than devices that apply vibration through the airways such as positive expiratory pressure valve.…”

Section: Methodsmentioning

confidence: 86%

Evaluation of a novel sputum clearance technique—hydro-acoustic therapy (HAT) in adult patients with cystic fibrosis: A feasibility study

2010

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This study was designed to investigate the efficacy, safety and patients' acceptance of a novel system for sputum clearance--Hydro Acoustic Therapy (HAT) in patients with cystic fibrosis (CF). This is a prospective crossover study where 18 patients received 6 sessions of physiotherapy over 6 separate days. These consisted of 2 sessions of either HAT, flutter valve or and sitting in the bath with sounds without vibration (placebo) for 30 minutes each. The efficacy was investigated by measuring the weight of wet and dry sputum after each session and by change in spirometry values. The preference was assessed by a questionnaire completed by patients at the end of the study about their preference of which type of physiotherapy received. The weight of both dry and wet sputum produced was similar in the 3 arms of the study. Spirometry values but not oxygen saturation were reduced after HAT and flutter therapy sessions. HAT therapy was preferred to flutter and placebo in terms of breathlessness, ease of sputum production and relaxation. Of the patients, 70% stated that they would choose HAT as their preferred physiotherapy method compared to 0% for flutter (χ(2) = 20.3, p < 0.0001). There were no procedure-related complications in any of the 3 arms of the study. HAT was found to be safe, well tolerated and favoured by the majority of CF patients. The effect of HAT, however, on sputum production was not superior to flutter or placebo.

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Section: Methodsmentioning

confidence: 86%

Evaluation of a novel sputum clearance technique—hydro-acoustic therapy (HAT) in adult patients with cystic fibrosis: A feasibility study

2010

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“…283 The researchers found that cavitations, hypothermia, and tissue shearing could be significant for low frequency sonar exposure, and no follow on experiments were recommended. Tests on human divers were performed, 169 and no lung resonance effects were observed due to exposure to the 160-320 Hz bands, which was the primary frequency range of interest in these studies. Recommendations for exposure of Navy divers to sound in the 160-320 Hz band were proposed, based upon data from these U.S. and U.K. reports.…”

Section: Low Frequency (100-500 Hz)mentioning

confidence: 99%

Non-Lethal Swimmer Neutralization Study

Rehn¹,

Riggs²

2002

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“…Furthermore, large displacements in the lung could cause damage to adjacent organ systems. Preliminary research (Rogers, et al, 1996) suggested that there might be a human lung resonance at around 130 Hz. Given the importance of the lung to a human diver, much of the animal research was directed toward defining the damage thresholds of the lung and surrounding tissues at the lung resonant frequency.…”

Section: Bioeffects Of Low Frequency Underwater Sound In Animalsmentioning

confidence: 99%

The Effects of Underwater Blast on Divers

Cudahy¹,

Parvin²

2001

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) 8-02-20012. REPORT TYPE PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBERNaval Submarine Medical Research Laboratory Naval Submarine Base New London Box 900 Groton, CT 06349-5900 NSMRL Report #1218 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)Naval Submarine Medical Resea NSMRL rch Laboratory Naval Submarine Base New SPONSOR/MONITOR'S REPORTGroton, CT 06349-5900 NUMBER(S) 1218 DISTRIBUTION / AVAILABILITY STATEMENT AApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTThis review of underwater blast provides a brief background on the physical acoustics for underwater blast, summarizes the literature on the bioeffects for divers, and compares model results. The final chapter provides the authors' views on necessary research to meet gaps in the models as well as describe the best application of our current knowledge to a guidance for underwater blast. SUBJECT TERMS SUMMARY PAGE THE PROBLEMUnderwater blast effects on divers received a great deal of attention up to the 1970s, and several investigators in the United States and the United Kingdom contributed to this work. Most of this research focused on the potentially lethal effects of the blast and used those to estimate safe diving distances. Several models were developed to make these estimates. The data used to drive the models were mostly conducted at shallow depths and with relatively small charges. METHODA review of all information on underwater blast and their affect in divers was undertaken by the authors. FINDINGSThere have been some more recent incidents which suggest that the current models of underwater blast may be incomplete and that additional data may be needed. Furthermore, there has been no systematic comparison of the various models. This review of underwater blast provides a brief background on the physical acoustics for underwater blast, summarizes the literature on the bioeffects for divers, and compares model results. The final chapter provides the author's views on necessary research to meet gaps in the model...

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Response of the Lungs to Low Frequency Underwater Sound.

Cited by 4 publications

References 0 publications

Evaluation of a novel sputum clearance technique—hydro-acoustic therapy (HAT) in adult patients with cystic fibrosis: A feasibility study

Evaluation of a novel sputum clearance technique—hydro-acoustic therapy (HAT) in adult patients with cystic fibrosis: A feasibility study

Non-Lethal Swimmer Neutralization Study

The Effects of Underwater Blast on Divers

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