Intraoperative hypotension and short-term outcomes after primary total hip arthroplasty

Listen to Brian and Lisa discuss the paper 'Intraoperative hypotension and short-term outcomes after primary total hip arthroplasty' published in the June 2026 issue of Bone & Joint Open.

Click here to read the paper.

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Transcript

[00:00:00] Welcome back to another episode of AI Talks with Bone & Joint from the publishers of Bone & Joint Open. Today, we're discussing the paper 'Intraoperative hypotension and short-term outcomes after primary total hip arthroplasty', published in June 2026 by A Burbelo and colleagues. I am Brian, and I'm joined by my co-host, Lisa.

Thanks, Brian. Let's dive right in. This paper examines the impact of intraoperative hypotension, IOH, on short-term outcomes after primary total hip arthroplasty, or THA. They wanted to ascertain if absolute or relative hypotension during surgery affects postoperative complications like readmissions and length of stay.

They undertook a retrospective review of 394 THA cases from a single institution between September 2020 and April 2025. It's key to note there are two principal ways to define intraoperative hypotension. [00:01:00] Absolute intraoperative hypotension, AIOH, defined as any intraoperative mean arterial pressure or MAP below 65 millimeters of mercury, and relative intraoperative hypotension, RIOH, defined as a 20% or greater decrease from the patient's preoperative baseline MAP.

Exactly. It is interesting that they found 28.4% of patients experienced AIOH, while 22.5% experienced RIOH. Surprisingly, the study showed that AIOH was not associated with increased readmissions or longer postoperative hospital stays. However, the presence of RIOH was linked to higher rates of reoperation within 90 days.

Quite so, Lisa. One crucial takeaway concerns intraoperative blood loss. Estimated blood loss, EBL, emerged as a significant predictor of prolonged hospital stays across all models. They found that for every 50 milliliters increase [00:02:00] in blood loss, the odds of an extended hospital stay increased noticeably.

That's an important point, Brian. The findings advocate for a more personalized approach to hemodynamic monitoring during THA rather than adhering to a rigid MAP threshold. The way individual physiological differences can influence surgical outcomes is quite fascinating.

Absolutely. Notably, the study also highlighted that regional anesthesia might be preferable for maintaining stable blood pressure during surgery.

They observed that patients who experienced AIOH were more likely to have received regional anesthesia, whereas general anesthesia was more common among those with RIOH. That's an interesting differentiation. Another facet worth mentioning is the connection, or lack thereof, between IOH and comorbidities such as preexisting hypertension, chronic kidney disease, or diabetes.

Surprisingly, AIOH was not significantly associated with these [00:03:00] conditions, but patients with AIOH did require more vasopressor support during surgery. Excellent point, Lisa. Ultimately, the study underscores the complexity of intraoperative management and the need for a personalized approach. Rather than relying solely on absolute MAP thresholds, surgeons and anesthetists might benefit from considering relative changes in blood pressure and other patient-specific factors.

Precisely. Before we wrap up, let’s summarize the key insights from this study. First, absolute intraoperative hypotension does not significantly impact short-term outcomes like readmission rates or hospital stay length. Second, relative hypotension can lead to higher reoperation rates within 90 days. And lastly, estimated blood loss is a significant predictor of prolonged hospitalization. And this supports the concept of individualized care, particularly in the [00:04:00] context of hemodynamic monitoring during surgeries like THA. It’s a fascinating study that opens up further avenues for research and clinical best practices.

Indeed, Brian. Thanks for breaking down these findings with me, and thank you to our listeners for tuning into AI Talks with Bone & Joint. Please join us next time for more discussions on the latest research in orthopaedics. Thank you, everyone. See you next time.