Wireless Stethoscope

Project Title

Wireless Stethoscope

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

In the Iot Based Wireless Stethoscope, we specialise in the planning reconfiguration and development of the electronic stethoscope by introducing wireless transmission between the chest-piece and therefore the head-piece using the IoT technology and a low-power microcontroller is to facilitate the operational mode selection. The advantage of using the web protocol is its ability to permit very high data rates compared to other protocols. The proposed design aims to enable different users during a team to pick different examination modes from the printed data without interference, minimize the mobility issues during examinations, and also reduce a number of the inherent problems related to connecting cable of the fashionable electronic stethoscope.

Project Objectives

IoT based Wireless Stethoscope aims to provide a device that helps the medical staff that not want to be physical contact with the effected patient especially when there are much chances of spreading the viruses

secondly,the Connected medical devices for fastest growing segments within IoT, are in greater use of smartphone-based apps,and  for healthcare monitoring of heart disease are believed to be driving demand, while proceeding with the trend we want to make a device that connect with the internet, send the data remotely to the android application.so that multiple doctors can do auscultation and monitor conditions of the patient.

In the pandemic time, corona virus is spreading worldwide and most of the doctors check the oxygen in blood circulation ,mandatory. so this device check the oxygen level as well as saved the record for creating the medical history of the patient

This system may serve as the means for monitoring patients from remote locations particularly quarantine units and can also be useful for training health personnel through broadcasting of recorded signals for analysis and evaluation by members of a medical team.

Project Implementation Method

Electronic stethoscope attempts to improve on some of the features of the traditional acoustic stethoscope. Heart sound is converted into digital analog by either using microphone or the piezoelectric sensor to acquire and transduce the sound energy into electrical energy. This is then amplified and processed by passing through a band pass filter to reduce the unwanted noise corrupting the sound signal.

A second round of de-noising is done with a digital filter, to extract the signal of interest from the frequency band. Some advanced artifact removal techniques are incorporated here. The heart sounds obtained in the process are normalized to a particular scale and are segmented into cycles. This helps us in detecting the heart sound components clearly.

The raw data obtained as an electrical signal are further represented in parametric form and are classified. This helps in decision-making. The sound can be converted into digital data and expressed as phonocardiogram or spectral graph. It can be converted into other common audio formats such as wav. It can be played in half speed for better appreciation of sounds. For best-quality listening, any standard earphones can be used.

Benefits of the Project It facilitates the Telemedicine

These advances of the intelligent electronic stethoscope introduce it in the field of the telemedicine. Its mobile technology makes possible that the intelligent electronic stethoscope is used from any point. Even for the proper patient from its residence. Who has to continue the indications of its doctor and send to him the test for its clinical determination.

With it promotes 2 fundamental aspects of the telemedicine

1. Teleconsultation: the professional can be at another point, to give the indications, to receive the test and to express the diagnosis. The handling and the versatility of the device make possible that the doctor uses it from any consultation, point of the clinic or of the domicile of the patient, without this one losing none of its functionalities.
2. Home Visits: another sanitary professional can realize the visit and the care of health. To realize the test with the electronic stethoscope and send it to the doctor

To share the record of the auscultation 

The electronic stethoscope allows professional sends to other partners the record of the test. Being able to use it in clinical meetings, and even in interdisciplinary derivations. The doctor of primary can advance the auscultation to the specialist or service to which the patient is a derivative

To display the sounds.

The application of the stethoscope contributes to make objective therapeutic decisions, to monitor the patient, as well as to solve doubts and to strengthen criteria. For it the doctor can reproduce from its phone and/or Tablet the auscultation so many times as consider necessary

To visualize the phonocardiogram.

It is another element that supports the professional in the reliability of the diagnosis. The electronic stethoscope makes possible to the doctor to visualize the development of the graph at the same time that the listening is realized

Technical Details of Final Deliverable

An electronic stethoscope amplifies low level body sounds and require conversion of acoustic sound waves to electrical signals which can be amplified and processed for optimal listening The simplest and low cost method of sound detection can be achieved by placing a microphone in the chest piece. Electronic stethoscope module consists of different types of components that can be used to amplify and optimize the sound signals in different frequencies. Sound signals can be digitized, encoded and decoded to have noise reduction. Processed data can be sent to the cloud using Internet of Things techniques. Internet of Thingsis a technology that uses internet to control or monitor the electronic devices. Heart beat sounds of a digital stethoscope is monitored over internet using the IOT and then graphs can be drawn

Condenser Microphone

A microphone or mic is an electric transducer that coverts the acoustic sounds to electrical signals. It is inserted into head of the mechanical stethoscope which converts heart sounds received by diaphragm to the electrical signals.

Preamplifiers

A preamplifier is used to generate a small electrical signal for further amplification. The op-amps of OP07CP integrated circuit chip employed to amplify the signals from the condenser microphone.

Filters

Filters permit selection of suitable frequency bands, so that particular heart sound frequencies can be reproduced. In general, the high frequency components of cardiovascular sound have a much smaller intensity than the low frequency components.

Analog to Digital Converter

A circuit which converts a signal from continuous to discrete or analog to digital. Analog signals can be directly measured. Digital signals have two binary states, 0 and 1. Microprocessors can perform only difficult processing on digitized signals. When signals are in digital they have less possibility of additional noise. Analog to digital converters are used, where an analog signal can be processed, stored, and transmitted in digital form.

Micro Controller

The two microcontroller are using in signal processing and signal transferring. Arduino Pro Mini is used for complete calculation and processing while NodeMCU 8266 is used for transmitting the data wirelessly 

Transmission of Heart Beat Rates Through IOT

Heart beat rates displayed in the LCD are transmitted to mobile application. simultaneously listen to the output supported device.Data can be retrieved and displayed in an android app, so that mutiple doctors can monitor the patient conditions from any where at any time.

Final Deliverable of the Project HW/SW integrated systemCore Industry HealthOther IndustriesCore Technology Internet of Things (IoT)Other TechnologiesSustainable Development Goals Good Health and Well-Being for PeopleRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	33000
NODE MCU 8266	Equipment	1	700	700
ADS115	Equipment	1	600	600
OLED	Equipment	1	1000	1000
ARDUINO PRO MINI	Equipment	1	650	650
CELL	Equipment	2	200	400
CELL HOLDER	Equipment	1	200	200
DC TO DC BUCK CONVERTOR	Equipment	2	250	500
COMPLEMENTRY IC	Equipment	2	300	600
INSTRUMENTAL AMPLIFIER	Equipment	2	1500	3000
SD CARD MODULE	Equipment	1	300	300
SD CARD	Equipment	1	3000	3000
MAX 30100 SPO2	Equipment	1	2300	2300
CASING AND FABRICATION	Equipment	1	6000	6000
DISCRETE PART	Equipment	1	3500	3500
CONDENCE MIC	Equipment	5	250	1250
DRUM	Equipment	1	4000	4000
STATIONARY AND PRINTING	Miscellaneous	1	5000	5000