Investigation of the quality of stored red blood cells after simulated air drop in the maritime environment.

BACKGROUND: Maritime medical capability may be compromised by blood resupply. Air-dropped red blood cells (RBCs) is a possible mitigation factor. This study set out to evaluate RBC storage variables after a simulated parachute air drop into the sea, as limited data exist. STUDY DESIGN AND METHODS: The air load construction for the air drop of blood was subject to static drop assessment to simulate a worst-case parachute drop scenario. One control and two test Golden Hour shipping containers were each packaged with 10 RBC units. The control box was not dropped; Test Boxes 1 and 2 were further reinforced with waterproof boxes and underwent a simulated air drop on Day 7 or Day 8 postdonation, respectively. One day after the drop and once a week thereafter until Day 43 of storage, RBCs from each box were sampled and tested for full blood counts, hemolysis, adenosine triphosphate, 2,3-diphosphoglycerate, pH, extracellular potassium, glucose, lactate, deformability, and RBC microvesicles. RESULTS: The packaging configuration completed the air drop with no water ingress or physical damage. All units met UK specifications for volume, hemoglobin, and hemolysis. There were no significant differences for any of the variables studied between RBCs in the control box compared to RBCs in Test Boxes 1 and 2 combined over storage. CONCLUSION: The test proved that the packaging solution and the impact of a maritime air drop as performed in this study, on Day 7 or Day 8 postdonation, did not affect the in vitro quality of RBCs in SAGM over storage for 35 days.

The Role 2 Afloat custodian.

The Role 2 Afloat (R2A) capability is now firmly established on several maritime platforms using the 370 Module (afloat) equipment. This year has seen the appointment on board ships that support R2A of a new full-time role, the Medical Module Manager (MMM), who is responsible for the equipment on board. This article outlines the new role.

[Intravascular decompressive aerogenesis ultrasonography in a practice of diving medical physician].

The aim of research was substantiation of necessity and accessibility of acoustic indication of intravascular decompressive aerogenesis in a practice of diving medical. Authors define possibilities of portable ultrasound blood flow indicator for location of decompressive gas bubbles. It was found that acoustic indication of intravascular decompressive gas bubbles made by simple portable ultrasonic blood flow meter allows to reveal moving gas bubble in blood flow. Authors came to conclusion that it is necessary to include portable ultrasonic diagnostic equipment into the norms of medical supply for ships, vessels and military units of the Armed Forces of the Russian Federation.

Vessel motion thresholds for maintaining physical and cognitive performance: a study of naval personnel at sea.

Methods and results are reported from a study of ships companies' exposure to low-frequency motions on three vessels of the Royal Navy. The aim of the study was to investigate relationships between deck accelerations and the incidence of problems such as difficulties with physical tasks, cognitive activities, motion sickness, and work effort. Ship motions were recorded continuously during sea patrols of 10-14 days. The data collected from the three vessels comprised 105 days of ship motions over 12 patrols, with 779 associated daily diaries from 78 participants. Problems most strongly associated with vessel motions were related to the difficulties with physical tasks. Some cognitive aspects of task performance and motion sickness were associated with vertical acceleration magnitudes, but the correlations were less strong than with physical tasks. Practitioner Summary: Little is known about the severity of ship motions that degrade physical and mental performance. The paper offers preliminary estimates of the motion threshold values below which the performance will not be degraded by motion.

Advanced instrumentation for research in diving and hyperbaric medicine.

Improving the safety of diving and increasing knowledge about the adaptation of the human body to underwater and hyperbaric environment require specifically developed underwater instrumentation for physiological measurements. In fact, none of the routine clinical devices for health control is suitable for in-water and/or under-pressure operation. The present paper addresses novel technological acquisitions and the development of three dedicated devices: * an underwater data logger for recording O2 saturation (reflective pulsoxymetry), two-channel ECG, depth and temperature; * an underwater blood pressure meter based on the oscillometric method; and * an underwater echography system. Moreover, examples of recordings are presented and discussed.

Efficacy of Medical Operations and Layout Planning Onboard Nontraditional US Navy Vessels at High Seas.

INTRODUCTION: Attempting to expedite delivery of care to wounded war fighters, this study aimed to quantify the ability of medical and surgical teams to perform lifesaving damage control and resuscitation procedures aboard nontraditional US Navy Vessels on high seas. Specifically, it looked at the ability of the teams to perform procedures in shipboard operating and emergency rooms by analyzing motion of personnel during the procedures. METHODS: One hundred and twelve damage control and resuscitation procedures were performed during a voyage of the US Naval Ship Brunswick in transit from Norfolk, Virginia, to San Diego, California. The ability of personnel to perform these procedures was quantified by the use of motion link analysis designed to track the movement of each participant as they completed their assigned tasks. RESULTS: The link analysis showed no significant change in the number of movements of participants from the beginning to the end of the study. However, there was a learning effect observed during the study, with teams completing tasks faster at the end of the study than at the beginning. CONCLUSION: This shows that the working conditions aboard the US Naval Ship Brunswick were satisfactory for the assigned tasks, indicating that these medical operations may be feasible aboard nontraditional US Navy vessels.

Longitudinal Analysis of CAD/CAM Restoration Incorporation Rates into Navy Dentistry.

INTRODUCTION: Computer-aided design/computer-aided manufacturing (CAD/CAM) has gained increasing popularity since the first commercially viable dental system was introduced in the mid-1980s. Digitally milled dental restorations can be fabricated chairside in the course of one dental appointment, reducing time, cost, and manpower when compared with traditional laboratory-fabricated analog restorations. Clinical performance, physical properties, and esthetics of digital restorations have been shown to be comparable to traditional analog restorations. The Navy has incorporated CAD/CAM systems into dental clinics on multiple platforms to include ships. The efficiency of this technology has the potential to positively impact dental health and mission readiness. The objective of the present study was to evaluate placement rates of CAD/CAM restorations by Navy dental providers. MATERIALS AND METHODS: Placement rates of CAD/CAM restorations from October 2011 to June 2017 (Department of Defense created codes specific to CAD/CAM restorations in 2011) and of laboratory-fabricated analog restorations from January 2008 to June 2017 were queried from the Dental Common Access System (DENCAS) and Corporate Dental Access system (CDA) and evaluated. Scatterplots for each dental restoration category were generated using monthly production data and overlaid with simple linear regression lines and 95% confidence intervals. Regression analysis was performed to determine whether changes in the monthly percentages of placements before and after CAD/CAM were increasing or decreasing and to determine whether the monthly percent change from before CAD/CAM implementation and after CAD/CAM implementation was significantly different from one another. RESULTS: A total of 20,512 CAD/CAM restorations were placed by Navy providers over the 68-month period. A year-over-year increase in digitally fabricated restorations was observed. As a percentage of total indirect restorations, CAD/CAM units surged from 13.8% in 2012 to 38.1% in 2017. All ceramic restorations fabricated by the classical analog method also increased significantly through the period. Traditional analog porcelain fused to metal (PFM) restorations and large amalgam restorations, which frequently serve a similar clinical purpose as indirect or direct full or partial tooth coverage restorations, both decreased significantly after CAD/CAM productivity tracking was initiated. CONCLUSIONS: Implementation of CAD/CAM digital restorations has led to a significant decline in specific traditional analog procedures since productivity tracking of CAD/CAM was initiated in 2011. Navy dentistry has embraced CAD/CAM as an efficient means to prepare sailors and marines for deployments, improve operational dental readiness, and potentially decrease dental emergencies by reducing the need for provisional restorations. The trend toward increased utilization of digital dentistry is expected to continue for the following reasons: (1) incorporation of CAD/CAM technology into dental school curricula, (2) advancement of CAD/CAM systems equipped with fast-evolving user interfaces, (3) increased accessibility to CAD/CAM technology in Navy clinics, and (4) training of a greater proportion of dentists in digital CAD/CAM technology. Future studies should investigate the survival rate of CAD/CAM restorations placed within military settings, cost, and manpower of maintaining CAD/CAM units, and impact on military dental laboratories associated with increased CAD/CAM usage.

A Medical Support in Offshore Racing - Workshop on Medical Support for Offshore Yacht Races, Telemedical Advice Service (TMAS), 1-2 December 2018, London, United Kingdom.

The safety and health of sailors offshore is of major concern. World Sailing (WS) and International Maritime Health Association (IMHA) are taking seriously the potential dangers to the safety and health at sea. By the nature of their sport, the sailors racing in offshore racing environment can be exposed to injuries and other health problems that can endanger their lives. Being aware of the potential dangers caused by the distance from onshore health facilities and lack of professional help on board, IMHA and WS decided to support the activities that are leading to the enhancement of safety and health protection on board. With common initiative, joint Workgroup on Medical Support in Offshore Racing has been formed and the series of workshop organised. The WS/IMHA Workgroup on Medical Support for Offshore Yacht Races previously reached consensus on the common competences and learning outcomes for medical training for offshore racing. In addition, the Workgroup has also set standards for required medical kit inventory for yachts par- ticipating in the various categories of offshore yacht races. Documents were both approved by WS Medical Commission and the IMHA Board. Fourth workshop on Medical Support for Offshore Yacht Races was held in London, United Kingdom, 1-2 December 2018 and workgroup reached consensus on the standards for availability of Telemedical Advice Services (TMAS) for the various categories of offshore yacht races held under the authority of WS. This position paper sets out how the TMAS should be integrated with the practical usage of medicines and medical equipment on board offshore racing yachts. In addition, this position paper also sets out how the level of medical training integrates with appropriate use of the TMAS. Overall, the three WS/IMHA position papers on the triad of medical inventories, medical training and TMAS, are aimed at providing the best possible medical care on offshore racing yachts, by fully integrating each part of the triad of medical support.

A Medical Support in Offshore Racing - Workshop on Medical Kit Inventory in Offshore Yacht Racing, 12-13 May 2017, Lorient, France.

No abstract.

Might telesonography be a new useful diagnostic tool aboard merchant ships? A pilot study.

BACKGROUND: Developments of new, ultra-light diagnostic ultrasound systems (UTS) and modern satellite telecommunication networks are opening new potential applications for diagnostic sonography. One such area is maritime medicine. It is our belief that ship officers can be trained to use diagnostic ultrasound systems with the aim to generate ultrasound images of sufficient quality to be interpreted by medical professionals qualified to read sonograms. METHODS: To test our thesis we included lectures and hands on scanning practice to the current maritime medicine curriculum at the Faculty of Maritime Studies at the University of Rijeka. Following the didactic and practical training all participating students examined several patients, some with pathology some without. Images obtained by students were then submitted for interpretation to a qualified physician (specialist of general surgery trained in UTS) who was unaware of the patient's pathology. RESULTS: In total, 37 students performed 37 examinations and made 45 ultrasound images, on 3 patients. In this paper, results on this pilot study are presented. CONCLUSION: It is possible to teach ship officers to produce diagnostically usable ultrasound pictures aboard ships at sea. But before reaching final conclusion about applicability of telesonography on board merchant ships, further studies are necessary, that would include studies of economic feasibility, and on validity of introducing such a diagnostic tool to the maritime medical practice.

Measuring instrument for the determination of the oxygen consumption of scuba divers in open waters.

An apparatus is described for the estimation of incremental oxygen consumption and carbon-dioxide production of SCUBA divers working in the field. Air is supplied to the diver in discrete volumes, and aliquots of respired air collected from each discrete time interval.

Estimating supply requirements for forward medical treatment facilities.

The Naval Health Research Center designed, developed, and used a systematic process to review Marine Corps medical supply requirements. This approach consisted of identifying the medical tasks required to treat patients with specific injuries and illnesses and determining the supplies and equipment required to perform each task. Subject matter experts reviewed treatment briefs, tasks, supplies, and equipment and examined their value to Marine Corps medical providers in forward areas of care. By establishing the clinical requirement for each item pushed forward, the Naval Health Research Center model was able to reduce the logistical burden carried by Marine Corps units and enhance far-forward clinical capability. The result of this effort is a model to estimate supplies and equipment based on a given casualty stream distribution. This approach produces an audit trail for each item and allows current authorized medical allowance list configurations to be revised using information such as type of conflict anticipated, expected duration, and changes in medical doctrine.

Neck posture and head movement in four rescue stretchers.

Neck posture and head movements were measured in four rescue stretchers: the Neil Robertson stretcher, which has been in service in the Royal Navy for almost 100 years, and three potential replacements. A repeated measures laboratory study was carried out to quantify neck posture and head movements while subjects reclined in the stretchers. Stretchers were compared on the basis of this critical aspect of their performance to complement the findings of ship-based usability trials. When the subjects were secured in each of the stretchers, wearing cervical collars and any restraints integral to that stretcher, the resting posture of the neck and the range of voluntary movement in flexion/extension, lateral flexion, and rotation were measured. In all of the stretchers, the neck was in an extended posture. The collars restricted head movements but they did not immobilize the neck. Stretcher 3, which had all of the functionality of the Neal Robertson stretcher, but with integral backboard and head blocks, limited head movements the most.

Evaluation of possible battlefield tourniquet systems for the far-forward setting.

A significant number of casualties in previous conflicts died from peripheral vascular wounds. A well-designed tourniquet could possibly have prevented these deaths. The objective of this study was the identification of such a tourniquet. A survey of Special Operations corpsmen established important characteristics necessary in an ideal tourniquet. Because most available devices do not and patented ideas could not meet these criteria, a number of prototypes were developed. Seven potentially satisfactory tourniquets were evaluated by 15 Navy SEAL corpsmen. The success and timing of placement were recorded, and a follow-up questionnaire was completed. Of the several successful tourniquets, two were preferred. Tourniquets incorporating a windlass technique take longer to place and often fail when placed with only one hand. New, relatively simple tourniquet devices incorporating bladder and ratchet mechanisms can significantly improve tourniquet performance.

The U.S. Navy decompression computer.

The U.S. Navy has recently approved the Cochran NAVY decompression computer (DC) for use in Naval Special Warfare diving. This action represents the first approval of a diver-worn DC for use in the U.S. Navy. This paper reviews the development and testing of both the decompression algorithm and the hardware chosen for the Navy's DC. The decompression software in the Cochran NAVY is the VVAL 18 algorithm developed at the Navy Experimental Diving Unit (NEDU) by Captain Ed Thalmann. A discussion of the relative conservatism of the VVAL18 algorithm in comparison to the U.S. Navy Standard Air Tables and the basis for the differences between the two is provided. The initial guidelines establishing DC diving practice for the Navy SEAL community are outlined as are plans for future research efforts in U.S. Navy DC diving.

[Telemedicine in the maritime environment--hightech with a fine tradition]. / Telemedizin in der Hochseeschifffahrt--Hightech aus Tradition.

Access to health care always has been one of the most critical issues for offshore crews. Therefore, telemedicine has a long and outstanding tradition in the maritime environment. Since 1931 Cuxhaven medical center (Medico Cuxhaven) operates as a hospital-based radio medical advice center (RMA) for ships worldwide providing one of the first routine telemedical services worldwide. For a long time this task was performed on a honorary basis by the hospital's physicians. In 1994 Germany accepted the IMO/ILO (International Maritime Organisation and International Labour Organisation) solution 164. Therefore, in 1998 a formal contract of the German Ministry of Transport officially installed Medico Cuxhaven as the TMAS Center for Germany. According to IMO/ILO solution 164, the RMA provides an expert level of care 24 h/day, 365 days/year. Cuxhaven hospital is a busy general hospital with departments of anesthesia and intensive care, internal medicine, surgery, gynecology and obstetrics, urology, pediatrics, ENT, radiology, and pain medicine. All physicians directly responding to TMAS calls have practical experience in maritime routine and emergency medicine. All incoming emergency calls are primarily handled by board-certified anesthesiologists, experienced in martime emergency medicine (e. g., staffing coastal SAR helicopters, working on rescue boats, carrying out repatriation services for sailors worldwide). If needed, other medical specialists are included. Today, Medico Cuxhaven takes an average workload of one to two emergency calls (response time < 20 s), two to three follow-up calls and approximately one informative call per day. Since 2000 transmission of digital photos has been used for routine RMA. Recently, a system for online and trenddata telemetry of twelve-lead ECG, NIBP (noninvasive blood pressure measurement), CO(2), SaO(2), pulse and respiration rates including the transmission of video images was developed. This system allows worldwide communications as it is capable of all possible means of telecommunication such as GSM, Inmarsat-ISDN or Iridium-Satellite-Transmission. So far, this system has been installed on board several German SAR rescue boats.However, radio telephone and the simple transmission of digital photography remain the basis of maritime radio medical advice service.

[Drug facilities in the French navy]. / Dotation en médicaments des bâtiments de la marine nationale.

Pharmaceutical facilities on board French Navy Vessels must be adapted to the constraints of medical quarters when they exist, or to the lack of such quarters when there are not any. They must meet the demands of the vessel's mission take into account, the number of people on board and the means of members of the Navy Medical Corps. In our ever changing world, the recent increase of female crew members has made it necessary to alter the list of medicines usually taken on board. Because of the advent of nuclear power, it has become necessary to take on board new kinds of medicines against radio-active elements and their pathological effects.

[The prospects for using mobile units for radiation hygiene control in the Navy]. / Perspektivy ispol'zovaniia mobil'nykh kompleksov radiatsionno-gigienicheskogo kontrolia v Voenno-Morskom Flote.

By one of ways of perfection of means and methods of the radioactive-hygiene irradiation doses control of personnel and radioactive contamination control of environment in the regions of dislocation of radioactive dangerous objects is creation of mobile complexes of the radioactive hygiene control, forming basis of mobile medical-economic complex (Zhiliaev E. G., Volodin A. S., Gavriutin V. M., 1995). In article a general characteristic of such complexes is given and example of practical use of one of typical mobile radiologic laboratories of domestic production as analogue of a mobile complex of the radioactive hygiene control.