Cement restrictor with integrated pressure transducer and method of measuring the pressure at the distal end of a bone canal
AssigneeDePuy Products, Inc.
InventorsTimothy Vendrely, Andrew Spitzer
Life of this patent
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Abstract
A cement restrictor for use in surgical procedures such as total hip replacement, for example, includes a pressure transducer and a transmitter electrically coupled to the pressure transducer. The cement restrictor is configured to be placed at a distal end of a pre-drilled bone canal in a patient's femur, for example, such that the pressure transducer may generate an output signal in response to the presence of bone cement injected into the bone canal and around the cement restrictor. The transmitter is configured to transmit this output pressure signal to an external receiver outside the patient's body.
Claims20
A cement restrictor for implantation into a bone comprising:
- a pressure transducer, and
- a transmitter electrically coupled to the pressure transducer and configured to transmit an output signal of the pressure transducer.
A bone cement measurement system for measuring the pressure of the bone cement within a distal portion of a pre-drilled canal of a patient's bone, the bone cement measurement system comprising:
- a cement restrictor including a power source, a pressure transducer electrically coupled to the power source, and a transmitter electrically coupled to the power source to transmit an output signal of the pressure transducer, and
- an external receiver to receive the output signal sent from the transmitter.
A method of measuring the pressure within a distal end of a bone canal during cement pressurization of the canal, the method comprising the steps of:
- inserting a pressure transducer into the distal end of the bone canal,
- inserting pressurized bone cement into the bone canal,
- reading an output signal from the pressure transducer, and
- adjusting the pressure of the pressurized bone cement being injected into the bone canal in response to the output signal.
A method of injecting pressurized cement into a pre-drilled bone canal, the method comprises the steps of:
- injecting pressurized cement at a first pressure into the pre-drilled bone canal,
- monitoring the pressure of the pressurized cement at a distal end of the bone canal via a wireless communication originating from the distal end of the bone canal,
- adjusting the pressure of the pressurized cement from the first pressure to a second pressure in response to the monitored pressure of the pressurized cement at the distal end of the bone canal, and
- injecting pressurized cement at the second pressure into the pre-drilled bone canal.
Dependencies are inferred from the claim text.