Contract

HEY/18/374 - CARDIAC CANNULA

  • Hull University Teaching Hospitals NHS Trust

F03: Contract award notice

Notice identifier: 2023/S 000-033038

Procurement identifier (OCID): ocds-h6vhtk-031501

Published 8 November 2023, 12:59pm



Section one: Contracting authority

one.1) Name and addresses

Hull University Teaching Hospitals NHS Trust

Supplies Building, Hull Royal Infirmary, Anlaby Road

Hull

HU3 2JZ

Contact

Ms Julie Wheldon

Email

julie.wheldon1@nhs.net

Telephone

+44 1482608986

Country

United Kingdom

Region code

UKE11 - Kingston upon Hull, City of

Internet address(es)

Main address

http://www.hey.nhs.uk

Buyer's address

http://www.hey.nhs.uk

one.4) Type of the contracting authority

Other type

NHS Acute Trust

one.5) Main activity

Health


Section two: Object

two.1) Scope of the procurement

two.1.1) Title

HEY/18/374 - CARDIAC CANNULA

Reference number

DN555130

two.1.2) Main CPV code

  • 33000000 - Medical equipments, pharmaceuticals and personal care products

two.1.3) Type of contract

Supplies

two.1.4) Short description

The supply of Cardiac Cannula

two.1.6) Information about lots

This contract is divided into lots: Yes

two.1.7) Total value of the procurement (excluding VAT)

Value excluding VAT: £2,188,314

two.2) Description

two.2.1) Title

Lot One - Malleable Heart Vent Cannula

Lot No

1

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Two - Left Heart Vent Cannula Angled and Wired

Lot No

2

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Three - Aortic Root Cardioplegia Cannula with Vent Flow with Guard Introducer

Lot No

3

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Four - Coronary Ostial Perfusion Cannula

Lot No

4

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Five - Femoral Venous Cannula

Lot No

5

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Six - Right Angled Venous Cannula

Lot No

6

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Seven - Malleable Venous Cannula

Lot No

7

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Eight - Single Venous Right Angled Cannula with Metal Tip

Lot No

8

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Nine - Aortic Cannula Straight Tip

Lot No

9

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Ten - Elongated Straight Arterial Cannula

Lot No

10

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Eleven - Elongated Cannula Guide Wire Kit

Lot No

11

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Fifteen - Angled Tip Aortic cannula with 3/8" Luer Lock Connector

Lot No

15

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Sixteen - Retrograde Cardioplegia Cannula with Pressure Line

Lot No

16

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No

two.2) Description

two.2.1) Title

Lot Seventeen - Coronary Balloon Cannula

Lot No

17

two.2.2) Additional CPV code(s)

  • 33182220 - Cardiac valve

two.2.3) Place of performance

NUTS codes
  • UKE11 - Kingston upon Hull, City of
  • UKE12 - East Riding of Yorkshire

two.2.4) Description of the procurement

The supply of Cardiac Cannula

two.2.5) Award criteria

Quality criterion - Name: Product Assessment / Weighting: 50

Quality criterion - Name: Delivery/ Timescale / Weighting: 10

Price - Weighting: 40

two.2.11) Information about options

Options: Yes

Description of options

Option to extend for up to 1 x 12 months

two.2.13) Information about European Union Funds

The procurement is related to a project and/or programme financed by European Union funds: No


Section four. Procedure

four.1) Description

four.1.1) Type of procedure

Open procedure

four.1.8) Information about the Government Procurement Agreement (GPA)

The procurement is covered by the Government Procurement Agreement: No

four.2) Administrative information

four.2.1) Previous publication concerning this procedure

Notice number: 2022/S 000-003686


Section five. Award of contract

Contract No

HEY/18/374

Lot No

1

Title

Lot One - Malleable Heart Vent Cannula

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Two - Left Heart Vent Cannula Angled and Wired

Lot No

2

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Three - Aortic Root Cardioplegia Cannula with Vent with Flow Guard Introducer

Lot No

3

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Four - Coronary Ostial Perfusion Cannula

Lot No

4

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Five - Femoral Venous Cannula

Lot No

5

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Six - Right Angled Venous Cannula

Lot No

6

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Seven - Malleable Venous Cannula

Lot No

7

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Eight - Single Venous Right Angled Cannula with Metal Tip

Lot No

8

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Nine - Aortic Cannula Straight Tip

Lot No

9

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Ten - Elongated Straight Arterial cannula

Lot No

10

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Eleven - Elongated cannula Guide Wire kit

Lot No

11

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Fifteen - Angled Tip Aortic Cannula with 3/8" Luer Lock Connector

Lot No

15

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Sixteen - Retrograde Cardioplegia Cannula with Pressure Line

Lot No

16

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section five. Award of contract

Contract No

Lot Seventeen - Coronary Balloon Cannula

Lot No

17

A contract/lot is awarded: Yes

five.2) Award of contract

five.2.1) Date of conclusion of the contract

31 October 2023

five.2.2) Information about tenders

Number of tenders received: 3

Number of tenders received by electronic means: 3

The contract has been awarded to a group of economic operators: No

five.2.3) Name and address of the contractor

Medtronic Ltd

Building 9, Croxley Park, Hatters Lane

Watford

WD18 8WW

Email

rs.watcontracts&pricing@medtronic.com

Telephone

+44 1923212213

Fax

+44 1923205156

Country

United Kingdom

NUTS code
  • UKH23 - Hertfordshire
The contractor is an SME

No

five.2.4) Information on value of contract/lot (excluding VAT)

Total value of the contract/lot: £2,188,314


Section six. Complementary information

six.4) Procedures for review

six.4.1) Review body

Hull University Teaching Hospitals NHS Trust

Hull

Country

United Kingdom