A medical diagnostic instrument (103, 301, 401, 501, 601, 701, 801, 1001, 1201, 1501, 1601, 8001), comprising: a proximal handle (111, 211, 603, 803, 1503, 1603, 8003) configured and dimensioned to permit an operator to manually grasp the instrument (103, 301, 401, 501, 601, 701, 801, 1001, 1201, 1501, 1601, 8001); an ultrasound probe (113, 305, 405, 617, 807, 1005, 1207,1511, 1611, 8011, 7010) including a longitudinal shaft (115, 123, 215, 307, 309, 407, 409, 605, 809, 813, 1003, 1007, 1205, 1211, 8015) extending distally from the handle (111, 211, 603, 803, 1503, 1603, 8003) and terminating in a distal end (117, 127, 415, 815, 1011), and an ultrasound transducer mounted with respect to the longitudinal shaft (115, 123, 215, 307, 309, 407, 409, 605, 809, 813, 1003, 1007, 1205, 1211, 8015), the ultrasound transducer including an array of ultrasonic energy generation elements; and a tactile feeler probe (121, 303, 403, 619, 811, 813, 1009, 1513, 1613, 8013) mounted with respect to the ultrasound probe (113, 305, 405, 617, 807, 1005, 1207,1511, 1611, 8011, 7010); at least one hollow receiver member mounted with respect to the longitudinal shaft (115, 123, 215, 307, 309, 407, 409, 605, 809, 813, 1003, 1007, 1205, 1211, 8015) of the ultrasound probe (113, 305, 405, 617, 807, 1005, 1207,1511, 1611, 8011, 7010); wherein the ultrasound transducer and the distal end (117, 127, 415, 815, 1011) are cooperatively adapted to be inserted into a desired anatomical location and to obtain thereat a corresponding two-dimensional image of the anatomical location for visual inspection by the operator for purposes of detecting ultrasonically-detectable anatomical properties by sending and receiving ultrasound signals; wherein the tactile feeler probe (121, 303, 403, 619, 811, 813, 1009, 1513, 1613, 8013) is adapted to be inserted into the desired anatomical location and to perform thereat a tactile inspection of the selected anatomical location by contacting the selected anatomical location; characterized in that the at least one hollow receiver member is adapted to receive a K-wire (1509,1512A,1609) to slidably mount the instrument (103,301, 401, 501, 601,701,801,1001,1201, 1501, 1601,8001) thereto and thereby guide the ultrasound and tactile feeler probes axially relative to the desired anatomical location. a proximal handle (111, 211, 603, 803, 1503, 1603, 8003) configured and dimensioned to permit an operator to manually grasp the instrument (103, 301, 401, 501, 601, 701, 801, 1001, 1201, 1501, 1601, 8001); an ultrasound probe (113, 305, 405, 617, 807, 1005, 1207,1511, 1611, 8011, 7010) including a longitudinal shaft (115, 123, 215, 307, 309, 407, 409, 605, 809, 813, 1003, 1007, 1205, 1211, 8015) extending distally from the handle (111, 211, 603, 803, 1503, 1603, 8003) and terminating in a distal end (117, 127, 415, 815, 1011), and an ultrasound transducer mounted with respect to the longitudinal shaft (115, 123, 215, 307, 309, 407, 409, 605, 809, 813, 1003, 1007, 1205, 1211, 8015), the ultrasound transducer including an array of ultrasonic energy generation elements; and a tactile feeler probe (121, 303, 403, 619, 811, 813, 1009, 1513, 1613, 8013) mounted with respect to the ultrasound probe (113, 305, 405, 617, 807, 1005, 1207,1511, 1611, 8011, 7010); at least one hollow receiver member mounted with respect to the longitudinal shaft (115, 123, 215, 307, 309, 407, 409, 605, 809, 813, 1003, 1007, 1205, 1211, 8015) of the ultrasound probe (113, 305, 405, 617, 807, 1005, 1207,1511, 1611, 8011, 7010); wherein the ultrasound transducer and the distal end (117, 127, 415, 815, 1011) are cooperatively adapted to be inserted into a desired anatomical location and to obtain thereat a corresponding two-dimensional image of the anatomical location for visual inspection by the operator for purposes of detecting ultrasonically-detectable anatomical properties by sending and receiving ultrasound signals; wherein the tactile feeler probe (121, 303, 403, 619, 811, 813, 1009, 1513, 1613, 8013) is adapted to be inserted into the desired anatomical location and to perform thereat a tactile inspection of the selected anatomical location by contacting the selected anatomical location; characterized in that the at least one hollow receiver member is adapted to receive a K-wire (1509,1512A,1609) to slidably mount the instrument (103,301, 401, 501, 601,701,801,1001,1201, 1501, 1601,8001) thereto and thereby guide the ultrasound and tactile feeler probes axially relative to the desired anatomical location.