Medtronic plc is strengthening its pain management portfolio with its $650 million move to buy SPR Therapeutics Inc. and bring the company’s peripheral nerve stimulation system for sustained pain relief into its neuromodulation offering. The deal marks Medtronic’s third tuck-in deal so far this year, following its $585 million purchase of Cathworks Ltd. and $550 million acquisition of Scientia Vascular Inc., and is also a sign of the momentum in M&A activity in the medtech sector with other players making strategic acquisitions.