40 lines
1.5 KiB
Markdown
40 lines
1.5 KiB
Markdown
Key Phrases:
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1. Transplant operations [are carried out at specialist transplant units. They] are never split across more than one unit.
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An operation takes place at 1 Unit.
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2. Each unit is based at one hospital only
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A unit can only be in 1 hospital
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3. Specialises in one type of transplantation
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A unit has 1 specialisation
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4. A unit can transplant the other types of organ which lie outside of its area of expertise.
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A unit does not specifically have to transplant it's specialisation
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5. Some hospitals host more than one transplant unit.
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However some do not have a transplant unit.
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A hospital can have 0, 1 or many transplant units.
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- **Transplant Operation**:
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- Involves a **Donor** [1:1] and a **Patient** [1:1].
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- Encompasses one or more **Organs** [1:M].
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- **Donor**:
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- May be associated with one or more **Transplant Operations** [1:M].
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- **Patient**:
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- May be associated with one or more **Transplant Operations** [1:M].
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- **Organ**:
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- Is involved in one or more **Transplant Operations** [M:1].
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- **Specialist Transplant Unit**:
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- Is tied to one **Hospital** [1:1].
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- Specialises in one type of **Organ** transplantation [o:1].
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- Can handle other types of **Organ** transplants outside its specialization [o:M].
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- **Hospital**:
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- Can host one or more **Specialist Transplant Units** [1:M].
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- Not all hospitals have a **Transplant Unit** [o:1].
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`Hospital` -|---o-< `TransplantUnit`
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- One hospital can have 0, 1 or many Units.
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- A unit must have a hospital, and only 1.
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