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Management of Hospital waste in BPKIHS


B.P. Koirala Institute of Health Sciences (BPKIHS) is a tertiary health care center and referral center in eastern development region. Thousands of patients come here every day seeking outpatient medical care. It also has got a 700-bedded inpatient ward and the largest (in terms of manpower) emergency unit in the nation. There is also a separate College of Dental Surgery(CODS) for dental facilities which consist of nine different departments. So, a large amount of general waste and biomedical waste is produced from the hospital every day.  General waste includes paper and plastic packages of medicine, wrappers of junk foods, kitchen waste from hospital kitchen, etc. and biomedical waste includes used gloves, cotton dressings and gauges, used syringes and medicine bottles, excised body parts, etc. These waste materials must be suitably disposed of immediately lest they putrefy, emit foul smells, act as a source of infection and disease, and become a public health hazard. It is the responsibility of the healthcare institute producing those wastes for the proper management of health care waste, not the government or local governing unit.

In BPKIHS too, there is a provision of proper waste disposal, which, however, is not the best protocol to follow. Juniormost staffs are responsible for the collection and disposal of the waste. For the workers’ health and safety, Health welfare scheme/Treatment facility is provided by the institution. The workers are vaccinated and Personal protective equipment (PPE) viz. Long boots, gloves, face mask, Cap and plastic apron are also provided for the employees. The materials used for the collection of the wastes are:
-Plastic bags (Black)
-Cartons (Red/Orange/Green colored)
- Plastic buckets
-Wheel big plastic bins (Red/Orange/Green)
Trolley

The wastes are segregated by using different color coded containers for different types of wastes.
The Nepal Health Research Council (NHRC) guidelines are followed as listed below:
Green Box (Non- Infectious): Non-infected stuffs/General waste
Orange box / Red box (Infectious): Infected Stuffs – Gauze/ bandage/cannula/urobag/blood/bodyfluid contaminated stuffs
Sharp Box: Needle/syringe/surgical blade/infected sharp materials

The collection and transportation of infectious wastes from wards to the incinerator is done in two shifts per day. And the residual sterile waste is disposed of to the dumping site. This is done by the attendants posted at the incinerator.

Similarly, the non-infectious waste is collected in two shifts from the wards to the bay/Collection container by ward attendants. Then, it is transported to the dumping site by sanitary workers in three shifts. 

Though the waste segregation system has been applied, it’s not properly followed due to unawareness. Also, The spread of infection from the open dumping site and direct contact transmission of disease to those poverty struck rag-pickers from the dumping site is always a risk which may cause a serious health hazard. Besides, A clean hospital and good housekeeping have a direct effect on the health, comfort and morale of patients, visitors and hospital personnel alike. Cleanliness radiates cheer and a well-kept hospital would give the public a feeling of confidence. So, due care has to be given in proper management of wastes and adequate budget should be allocated for that purpose.


MCQs on Oral Histology : Dental Pulp


# Which of the following structure is not found in a living pulp ?
A. Collagen fibers
B. Haversian fibers
C. Non myelinated nerve fibers
D. Reticulum

# The dental pulp contains nerve endings / receptors for:
A. Pain
B. Pressure
C. Proprioception
D. Temperature

# The dental pulp is derived from :
A. Dental papilla
B. Dental Sac
C. Odontoblasts
D. Stellate reticulum

# Pulp responds to all stimuli by pain because it has only:
A. Free nerve endings
B. Krause end bulbs
C. Pacinian corpuscle
D. Ruffini corpuscle

# All of the following are true about functions of dental pulp EXCEPT:
A. Formation of dentin
B. Nerve supply to dentin
C. Sends impulse to CNS
D. Nerve supply to enamel through fibers

# Odontoblasts are derived from :
A. Undifferentiated mesenchymal cells
B. Histocytes
C. Macrophages
D. Lymphocytes

# The primary function of the dental pulp is:
A. Nutritive
B. Production of dentin
C. Production of enamel
D. Vascular supply to the teeth

# The radicular pulp is continuous with tissues of the periapical area via the :
A. Pulp canal
B. Pulp chamber
C. Mental foramen
D. Apical foramen

# Weil's zone of pulp is :
A. Cell degenerated zone
B. Cell rich zone
C. Cell regenerated zone
D. Cell free zone

# The cells of the dental pulp which are responsible for the deposition of reparative dentin are:
A. Osteoblasts
B. Odontoblasts
C. Ameloblasts
D. Osteocytes


# Histologically, the dental pulp most closely resembles:
A. Nerve tissue
B. Vascular tissue
C. Granulation tissue
D. Loose connective tissue

# Pericytes are found:
A. In thymus
B. Around capillaries of pulp
C. In gall bladder
D. Along with Heparin on surface of mast cells

# The odontoblasts killed during cavity preparation are derived from :
A. Unaffected odontoblasts from the pulp
B. Undifferentiated cells
C. Histocytes
D. Osteoblasts

# Proprioceptors are seen in all EXCEPT:
A. Skeletal muscle
B. TMJ
C. Pulp
D. None of the above

# Cells occurring in greatest number in pulp are :
A. Cementoblasts
B. Fibroblasts
C. Osteoblasts
D. Ameloblasts

# Pulp tissue contains all except:
A. Fibroblast
B. Capillary
C. Collagen
D. Cell rests of Malassez

# The cell free zone in pulp lies:
A. Above odontoblast
B. Below odontoblast
C. In radicular pulp
D. In pulp horn

# Aging process affects pulp tissue by:
A. Decreasing the size and shape of pulp tissue and cellular component
B. Increase cellular component at the expense of fibrous componenet
C. Increases vascularity of the pulp
D. Decreases the calcific component of the pulp

# The number of pulp organs in a person is :
A. 32
B. 20
C. 52
D. 62

# The total volume of all permanent pulp organ is:
A. 0.38 cc
B. 0.58 cc
C. 0.02 cc
D. 3.8 cc

# The size of apical foramen of maxillary teeth in adult is:
A. 0.4 mm
B. 0.3 mm
C. 0.2 mm
D. 0.7 mm

# The second most prominent cells in the pulp are:
A. Fibroblasts
B. Defense cells
C. Odontoblasts
D. Histocytes or resting wandering cell


# The fibroblasts associated with capillaries are:
A. Plasma cell
B. Histocytes
C. Lymphocytes
D. Pericytes

# Which of the following is true ?
A. Pulpal pressure is highest among body tissues
B. Majority of nerve that enter the pulp are non myelinated and are sympathetic in nature
C. Plexus of Rashkow or parietal layer of nerves is formed by network of peripheral axons located adjacent to cell rich zone
D. All of the above

# The average life time of primary pulp in oral cavity is:
A. 8.3 years
B. 5 years
C. 7 years
D. 2 and half years

# Regressive changes in pulp include :
A. Increased fibrotic component
B. Decreased cellular component
C. Calcification in blood vessels near apical foramen
D. All of the above

# Which of the following is not correct ?
A. Free denticles are entirely surrounded by pulp tissue (free of dentin)
B. Embedded denticles are entirely surrounded by dentin (embedded in dentin)
C. Attached denticles are partly fused with dentin
D. False denticles contain many dentinal tubules

# The development of pulp begins :
A. 6th week of IU
B. 8th week of IU
C. 10th week of IU
D. 18th week of IU

# Size of pulp chamber :
A. Increases with age
B. Decreases with age
C. Increases in some cases and decreases in some cases
D. None of the above

# Protein secreted by odontoblast :
A. Chitin
B. Keratin
C. Collagen
D. Elastin

# The primary response of the pulp to tissue destruction is :
A. Necrosis
B. Ulceration
C. Calcific degeneration
D. Inflammation

# Unmyelinated nerve fibers of pulp are:
A. Sensory in nature
B. Respond to hot and cold
C. Carry pain sensation
D. Associated with blood vessels and are sympathetic in nature

# Vitality of pulp depends upon:
A. Blood supply
B. Nerve supply
C. Lymphatic supply
D. All of the above

# Dystrophic calcification is seen most commonly in which of the following oral tissues?
A. Enamel
B. Pulp
C. Dentin
D. Periodontal ligament

# The Plexus of Rashkow is present in which of the following zones in the pulp ?
A. Cell free zone
B. Cell rich zone
C. Odontoblastic zone
D. Pulp core

# The diameter of the largest arterial vessels in the pulp range from:
A. 50-100 miocrometers
B. 101-150 micrometers
C. 151-200 micrometers
D. 201-250 micrometers

# Pain originate in dental pulp due to :
A. Free nerve ending in cell rich zone
B. Free nerve ending at sub odontoblastic layer
C. Krause bulb at the center of the pulp
D. Meissner's corpuscles at cell rich zone

# The pulp stem cells are :
A. Pluripotent in nature
B. Totipotent in nature
C. Multipotent in nature
D. None of the above


Dental MCQs - Multiple Choice Questions in Dentistry






*** AIIMS May 2011


# DENTAL MATERIALS

*** Restorative Resins


# GENERAL ANATOMY


#GENERAL PATHOLOGY


# PHYSIOLOGY

*** Special Techniques in Complete Dentures

# REMOVABLE PARTIAL DENTURES
*** Removable Partial Dentures: Introduction and Classification
*** Major and Minor Connnectors

# FIXED PARTIAL DENTURES
*** Principles of Tooth Preparation
*** Pontics and Finish Lines

# ORAL ANATOMY AND HISTOLOGY


# ORAL MEDICINE AND PATHOLOGY

*** Developmental Disturbances
*** Child Abuse and Neglect

# ORTHODONTICS




# PUBLIC HEALTH DENTISTRY
*** Epidemiology
*** Biostatistics

Different Types of Pathological Calcification

Q. Discuss the types of calcification.

The mineralisation of body tissues with calcium is a normal physiological process in tissues like bones and teeth, termed as physiological calcification. However, sometimes the visceral tissues and other soft tissues may also get calcified in many diseased states, which is called pathological calcification. In addition to the calcium salts, smaller amounts of iron, magnesium and other minerals may also be deposited.

Pathological calcification can be broadly classified into two types: Dystrophic Calcification and Metastatic Calcification.

Dystrophic calcification: When the deposition takes place in dead or dying tissues, then it is termed as dystrophic calcification. The serum calcium levels are normal and the calcium metabolism is not deranged. Though hypercalcemia is not a prerequisite for dystrophic calcification, hypercalcemia can exacerbate it. It is seen in areas of tissue necrosis of any type. It is almost always present in the atheromas of advanced atherosclerosis, associated with intimal injury in the aorta and large arteries and characterized by the accumulation of lipids. Sometimes dystrophic calcification may also indicate organ dysfunction, e.g. calcification can develop in damaged heart valves, resulting in severely compromised valve motion. Pathogenesis involves initiation and propagation where crystalline calcium phosphate is formed as the final product.


Metastatic Calcification: Due to hypercalcemia, metastatic calcification may occur in normal tissues.

 The causes of hypercalcemia may be:
- increased secretion of parathyroid hormone (due to either primary parathyroid tumors or production of parathyroid hormone–related protein by other malignant tumors)
- destruction of bone (e.g. Paget's disease, Myeloma, Leukemia, etc.)
- Vitamin D - related disorders and sarcoidosis
- renal failure, in which phosphate retention leads to secondary hyperparathyroidism

Metastatic calcification can occur widely throughout the body but principally affects the interstitial tissues of the vasculature, kidneys, lungs, and gastric mucosa.

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