diff --git a/Cardiopulmonarybypasssystems/MainWindow.xaml b/Cardiopulmonarybypasssystems/MainWindow.xaml
index 621a7be..c884478 100644
--- a/Cardiopulmonarybypasssystems/MainWindow.xaml
+++ b/Cardiopulmonarybypasssystems/MainWindow.xaml
@@ -274,6 +274,27 @@
                                             <StackPanel Grid.Column="2">
                                                 <TextBlock Style="{StaticResource CaptionStyle}" Text="&#x586B;&#x5199;&#x8BF4;&#x660E;" />
                                                 <TextBlock Margin="0,0,0,6" Foreground="{StaticResource MutedTextBrush}" FontSize="13" Text="{Binding RealtimeMeasurementHint}" TextWrapping="Wrap" />
+                                                <Border Margin="0,0,0,8" Padding="12" Background="#FFF8F4EA" CornerRadius="14">
+                                                    <StackPanel>
+                                                        <StackPanel.Style>
+                                                            <Style TargetType="StackPanel">
+                                                                <Setter Property="Visibility" Value="Collapsed" />
+                                                                <Style.Triggers>
+                                                                    <DataTrigger Binding="{Binding IsAntiCollapseSelected}" Value="True">
+                                                                        <Setter Property="Visibility" Value="Visible" />
+                                                                    </DataTrigger>
+                                                                </Style.Triggers>
+                                                            </Style>
+                                                        </StackPanel.Style>
+                                                        <TextBlock Style="{StaticResource CaptionStyle}" Text="&#x6297;&#x584C;&#x9677;&#x5FEB;&#x901F;&#x91C7;&#x6837;" />
+                                                        <TextBlock FontSize="13" Text="{Binding AntiCollapseBaselineDisplay}" TextWrapping="Wrap" />
+                                                        <TextBlock Margin="0,4,0,0" FontSize="13" Text="{Binding AntiCollapseComparisonDisplay}" TextWrapping="Wrap" />
+                                                        <WrapPanel Margin="0,8,0,0">
+                                                            <Button Command="{Binding CaptureAntiCollapseBaselineCommand}" Content="&#x91C7;&#x96C6;&#x57FA;&#x7EBF;" Background="#FF6B8791" />
+                                                            <Button Command="{Binding CaptureAntiCollapseComparisonCommand}" Content="&#x91C7;&#x96C6;&#x8D1F;&#x538B;&#x6BD4;&#x8F83;" Background="#FFE0A14A" />
+                                                        </WrapPanel>
+                                                    </StackPanel>
+                                                </Border>
                                                 <TextBox Text="{Binding ResultValue, UpdateSourceTrigger=PropertyChanged}" MinHeight="104" AcceptsReturn="True" TextWrapping="Wrap" VerticalScrollBarVisibility="Auto" IsReadOnly="{Binding SelectedItemUsesRealtimeValue}" />
                                                 <TextBlock Style="{StaticResource CaptionStyle}" Text="&#x5224;&#x5B9A;" />
                                                 <ComboBox ItemsSource="{Binding ResultStatusOptions}" SelectedItem="{Binding SelectedResultStatusText, Mode=TwoWay}" />
diff --git a/Cardiopulmonarybypasssystems/Services/MockModbusTelemetryService.cs b/Cardiopulmonarybypasssystems/Services/MockModbusTelemetryService.cs
index e1221c2..719d46f 100644
--- a/Cardiopulmonarybypasssystems/Services/MockModbusTelemetryService.cs
+++ b/Cardiopulmonarybypasssystems/Services/MockModbusTelemetryService.cs
@@ -1,10 +1,18 @@
-using Cardiopulmonarybypasssystems.Models;
+using System.Net.Sockets;
+using Cardiopulmonarybypasssystems.Models;
 using NModbus;
 
 namespace Cardiopulmonarybypasssystems.Services;
 
-public sealed class MockModbusTelemetryService : IModbusTelemetryService
+public sealed class MockModbusTelemetryService : IModbusTelemetryService, IDisposable
 {
+    private const string IpAddress = "192.168.1.10";
+    private const int Port = 502;
+    private const byte SlaveId = 1;
+    private const ushort ProximalPressureRegister = 1330;
+    private const ushort DistalPressureRegister = 1380;
+
+    private readonly object _syncRoot = new();
     private readonly Random _random = new();
     private readonly ModbusFactory _factory = new();
     private readonly List<DeviceChannel> _channels =
@@ -12,8 +20,8 @@ public sealed class MockModbusTelemetryService : IModbusTelemetryService
         new() { Name = "主泵流量", Unit = "L/min", Value = 4.82, Min = 0, Max = 7 },
         new() { Name = "静脉引流流量", Unit = "L/min", Value = 4.54, Min = 0, Max = 7 },
         new() { Name = "动脉回输流量", Unit = "L/min", Value = 4.86, Min = 0, Max = 7 },
-        new() { Name = "入口压力", Unit = "mmHg", Value = 112, Min = 60, Max = 220 },
-        new() { Name = "出口压力", Unit = "mmHg", Value = 94, Min = 40, Max = 180 },
+        new() { Name = "远端压力", Unit = "mmHg", Value = 94, Min = 40, Max = 180 },
+        new() { Name = "近端压力", Unit = "mmHg", Value = 112, Min = 60, Max = 220 },
         new() { Name = "负压辅助引流", Unit = "kPa", Value = -10.4, Min = -20, Max = 0 },
         new() { Name = "模拟血液温度", Unit = "°C", Value = 37.1, Min = 34, Max = 40 },
         new() { Name = "再循环率", Unit = "%", Value = 6.8, Min = 0, Max = 20 },
@@ -21,21 +29,117 @@ public sealed class MockModbusTelemetryService : IModbusTelemetryService
         new() { Name = "白细胞减少率", Unit = "%", Value = 7.1, Min = 0, Max = 20 }
     ];
 
-    public IReadOnlyList<DeviceChannel> GetChannels() => _channels;
+    private TcpClient? _tcpClient;
+    private IModbusMaster? _master;
+    private bool _connectionInitialized;
+
+    public IReadOnlyList<DeviceChannel> GetChannels()
+    {
+        EnsureConnected();
+        return _channels;
+    }
 
     public IReadOnlyList<AlarmMessage> UpdateChannels()
     {
-        _ = _factory;
+        EnsureConnected();
 
-        foreach (var channel in _channels)
+        lock (_syncRoot)
+        {
+            TryReadPressureChannels();
+            SimulateAuxiliaryChannels();
+
+            var pumpFlow = Channel("主泵流量");
+            var drainageFlow = Channel("静脉引流流量");
+            var returnFlow = Channel("动脉回输流量");
+
+            drainageFlow.Value = Math.Clamp(
+                Math.Min(drainageFlow.Value, returnFlow.Value - Next(0.12, 0.48)),
+                drainageFlow.Min,
+                drainageFlow.Max);
+            pumpFlow.Value = Math.Clamp(
+                (drainageFlow.Value + returnFlow.Value) / 2d + Next(-0.05, 0.05),
+                pumpFlow.Min,
+                pumpFlow.Max);
+
+            var recirculationRate = returnFlow.Value <= 0.01
+                ? 0
+                : Math.Clamp((returnFlow.Value - drainageFlow.Value) / returnFlow.Value * 100d, 0d, 100d);
+            Channel("再循环率").Value = recirculationRate;
+
+            return BuildAlarms();
+        }
+    }
+
+    public void Dispose()
+    {
+        lock (_syncRoot)
+        {
+            _master?.Dispose();
+            _tcpClient?.Dispose();
+            _master = null;
+            _tcpClient = null;
+        }
+    }
+
+    private void EnsureConnected()
+    {
+        lock (_syncRoot)
+        {
+            if (_master is not null && _tcpClient?.Connected == true)
+            {
+                return;
+            }
+
+            Dispose();
+
+            try
+            {
+                _tcpClient = new TcpClient();
+                _tcpClient.Connect(IpAddress, Port);
+                _master = _factory.CreateMaster(_tcpClient);
+                _connectionInitialized = true;
+            }
+            catch
+            {
+                _master = null;
+                _tcpClient?.Dispose();
+                _tcpClient = null;
+            }
+        }
+    }
+
+    private void TryReadPressureChannels()
+    {
+        if (_master is null)
+        {
+            SimulatePressureChannels();
+            return;
+        }
+
+        try
+        {
+            var proximalRaw = _master.ReadHoldingRegisters(SlaveId, ProximalPressureRegister, 1)[0];
+            var distalRaw = _master.ReadHoldingRegisters(SlaveId, DistalPressureRegister, 1)[0];
+
+            Channel("近端压力").Value = ConvertRegisterToPressure(proximalRaw, Channel("近端压力"));
+            Channel("远端压力").Value = ConvertRegisterToPressure(distalRaw, Channel("远端压力"));
+        }
+        catch
+        {
+            Dispose();
+            SimulatePressureChannels();
+        }
+    }
+
+    private void SimulateAuxiliaryChannels()
+    {
+        foreach (var channel in _channels.Where(channel => channel.Name is not "近端压力" and not "远端压力"))
         {
             var offset = channel.Name switch
             {
                 "主泵流量" => Next(-0.08, 0.08),
                 "静脉引流流量" => Next(-0.08, 0.08),
                 "动脉回输流量" => Next(-0.06, 0.06),
-                "入口压力" => Next(-3.0, 3.0),
-                "出口压力" => Next(-2.5, 2.5),
                 "负压辅助引流" => Next(-0.6, 0.6),
                 "模拟血液温度" => Next(-0.15, 0.15),
                 "游离血红蛋白" => Next(-0.003, 0.003),
@@ -44,35 +148,47 @@ public sealed class MockModbusTelemetryService : IModbusTelemetryService
 
             channel.Value = Math.Clamp(channel.Value + offset, channel.Min, channel.Max);
         }
+    }
 
-        var pumpFlow = Channel("主泵流量");
-        var drainageFlow = Channel("静脉引流流量");
-        var returnFlow = Channel("动脉回输流量");
+    private void SimulatePressureChannels()
+    {
+        var proximal = Channel("近端压力");
+        var distal = Channel("远端压力");
 
-        drainageFlow.Value = Math.Clamp(
-            Math.Min(drainageFlow.Value, returnFlow.Value - Next(0.12, 0.48)),
-            drainageFlow.Min,
-            drainageFlow.Max);
-        pumpFlow.Value = Math.Clamp(
-            (drainageFlow.Value + returnFlow.Value) / 2d + Next(-0.05, 0.05),
-            pumpFlow.Min,
-            pumpFlow.Max);
+        proximal.Value = Math.Clamp(proximal.Value + Next(-3.0, 3.0), proximal.Min, proximal.Max);
+        distal.Value = Math.Clamp(distal.Value + Next(-2.5, 2.5), distal.Min, distal.Max);
 
-        var recirculationRate = returnFlow.Value <= 0.01
-            ? 0
-            : Math.Clamp((returnFlow.Value - drainageFlow.Value) / returnFlow.Value * 100d, 0d, 100d);
-        Channel("再循环率").Value = recirculationRate;
+        if (distal.Value > proximal.Value - 2)
+        {
+            distal.Value = Math.Max(distal.Min, proximal.Value - Next(6, 18));
+        }
+    }
 
+    private List<AlarmMessage> BuildAlarms()
+    {
         var alarms = new List<AlarmMessage>();
+        var deltaPressure = Channel("近端压力").Value - Channel("远端压力").Value;
+        var recirculationRate = Channel("再循环率").Value;
+        var pumpFlow = Channel("主泵流量").Value;
+        var returnFlow = Channel("动脉回输流量").Value;
 
-        var deltaPressure = Channel("入口压力").Value - Channel("出口压力").Value;
         if (deltaPressure > 24)
         {
             alarms.Add(new AlarmMessage
             {
                 Timestamp = DateTime.Now,
                 Level = "高",
-                Message = $"压差 {deltaPressure:F1} mmHg，接近 4.3.1 压力降上限"
+                Message = $"压力降 ΔP {deltaPressure:F1} mmHg 偏高，请复核近端/远端压力与流量点"
+            });
+        }
+
+        if (!_connectionInitialized || _master is null)
+        {
+            alarms.Add(new AlarmMessage
+            {
+                Timestamp = DateTime.Now,
+                Level = "中",
+                Message = $"ModbusTcp 未连接，当前使用本地模拟压力数据。目标 {IpAddress}:{Port}"
             });
         }
 
@@ -86,13 +202,13 @@ public sealed class MockModbusTelemetryService : IModbusTelemetryService
             });
         }
 
-        if (Math.Abs(pumpFlow.Value - returnFlow.Value) > 0.35)
+        if (Math.Abs(pumpFlow - returnFlow) > 0.35)
         {
             alarms.Add(new AlarmMessage
             {
                 Timestamp = DateTime.Now,
                 Level = "中",
-                Message = $"主泵/回输流量差 {Math.Abs(pumpFlow.Value - returnFlow.Value):F2} L/min，建议检查流量传感器标定"
+                Message = $"主泵/回输流量差 {Math.Abs(pumpFlow - returnFlow):F2} L/min，建议检查流量传感器标定"
             });
         }
 
@@ -109,6 +225,12 @@ public sealed class MockModbusTelemetryService : IModbusTelemetryService
         return alarms;
     }
 
+    private static double ConvertRegisterToPressure(ushort rawValue, DeviceChannel channel)
+    {
+        var signedValue = rawValue > short.MaxValue ? rawValue - 65536 : rawValue;
+        return Math.Clamp(signedValue, channel.Min, channel.Max);
+    }
+
     private DeviceChannel Channel(string name) => _channels.First(channel => channel.Name == name);
 
     private double Next(double min, double max) => min + (_random.NextDouble() * (max - min));
diff --git a/Cardiopulmonarybypasssystems/Services/StandardRepository.cs b/Cardiopulmonarybypasssystems/Services/StandardRepository.cs
index 82a25ae..d42b2fb 100644
--- a/Cardiopulmonarybypasssystems/Services/StandardRepository.cs
+++ b/Cardiopulmonarybypasssystems/Services/StandardRepository.cs
@@ -24,25 +24,25 @@ public sealed class StandardRepository : IStandardRepository
             Category = "性能特征",
             Item = "压力降",
             AcceptanceCriteria = "在模拟血液黏度 3.2 mPa·s ± 0.2 mPa·s、37 ℃ ± 2 ℃ 条件下，于最大标称流量的 50%、75%、100% 流量点测得的压力降应在制造商声明范围内。",
-            TestMethod = "使用最终灭菌成品接入循环回路并排尽气泡；在模拟血液黏度 3.2 mPa·s ± 0.2 mPa·s、37 ℃ ± 2 ℃ 条件下，于 50%、75%、100% 最大标称流量分别测量入口和出口压力，计算压力降并评定。",
-            RecordFocus = "记录试验条件、流量点、入口/出口压力、压力降 ΔP 及判定结果",
+            TestMethod = "使用最终灭菌成品接入循环回路并排尽气泡；在模拟血液黏度 3.2 mPa·s ± 0.2 mPa·s、37 ℃ ± 2 ℃ 条件下，于 50%、75%、100% 最大标称流量分别测量近端和远端压力，计算压力降并评定。",
+            RecordFocus = "记录试验条件、流量点、近端/远端压力、压力降 ΔP 及判定结果",
             CaptureMode = InspectionItemCaptureMode.RealtimeMonitor,
-            MeasurementSource = "主泵流量、入口/出口压力、模拟血液温度传感器",
+            MeasurementSource = "主泵流量、近端/远端压力、模拟血液温度传感器",
             ManualEntryHint = "该项目由实时压力信号自动采集，无需人工重复填写。",
-            LiveDisplayHint = "实时显示试验温度、当前流量、50%/75%/100% 标称流量点及入口/出口压力，用于记录压力降试验。"
+            LiveDisplayHint = "实时显示试验温度、当前流量、50%/75%/100% 标称流量点及近端/远端压力，用于记录压力降试验。"
         },
         new()
         {
             Clause = "4.3.2",
             Category = "性能特征",
             Item = "抗塌陷",
-            AcceptanceCriteria = "负压后压降增量不超过 40%。",
-            TestMethod = "施加负压后比较压差增量和流量变化；判定压降增量不超过限值。",
-            RecordFocus = "记录负压与压差变化",
+            AcceptanceCriteria = "对引流插管，在远端施加 -6.67 kPa 负压后，由插管引起的压力降增加值不应超过基线值的 50%。",
+            TestMethod = "使用模拟血液（2.0~3.5 mPa·s）在 37 ℃ ± 2 ℃ 条件下，先于制造商规定的最大血流量测量基线压力降，再在相同流量条件下于远端施加 -6.67 kPa 负压，比较压力降增加值。",
+            RecordFocus = "记录基线压力降、负压加载后压力降、增加值、增加率及比较结论",
             CaptureMode = InspectionItemCaptureMode.RealtimeAssist,
-            MeasurementSource = "负压辅助引流、入口/出口压差趋势",
-            ManualEntryHint = "系统实时显示负压与压差趋势，最终结论仍由检测员根据检测记录手动填写。",
-            LiveDisplayHint = "建议结合负压、压差增量和流量变化综合判定是否塌陷。"
+            MeasurementSource = "负压辅助引流、近端/远端压力、主泵流量、模拟血液温度",
+            ManualEntryHint = "系统自动给出基线、负压后压力降和增幅比较建议，最终结论仍由检测员确认保存。",
+            LiveDisplayHint = "建议先采集无负压基线，再施加 -6.67 kPa 负压比较压力降增幅。"
         },
         new()
         {
diff --git a/Cardiopulmonarybypasssystems/ViewModels/MainViewModel.cs b/Cardiopulmonarybypasssystems/ViewModels/MainViewModel.cs
index 1caaa2e..087bc7a 100644
--- a/Cardiopulmonarybypasssystems/ViewModels/MainViewModel.cs
+++ b/Cardiopulmonarybypasssystems/ViewModels/MainViewModel.cs
@@ -13,6 +13,12 @@ public partial class MainViewModel : ObservableObject
 {
     private readonly IModbusTelemetryService _telemetryService;
     private readonly DispatcherTimer _timer;
+    private const double AntiCollapseTargetNegativePressure = -6.67;
+    private double? _antiCollapseBaselinePressureDrop;
+    private double? _antiCollapseBaselineFlow;
+    private DateTime? _antiCollapseBaselineCapturedAt;
+    private string _lastAutoAntiCollapseResult = string.Empty;
+    private string _lastAutoAntiCollapseNote = string.Empty;
 
     [ObservableProperty]
     private string pageTitle = "心肺转流系统一次性使用动静脉插管检测";
@@ -152,6 +158,21 @@ public partial class MainViewModel : ObservableObject
     public string PressureDropConditionDisplay => $"模拟血液 3.2±0.2 mPa·s / {TemperatureDisplay} / 最终灭菌成品";
     public string PressureDropFlowPointDisplay =>
         $"50%={PressureDropFlowPoint(0.50):F2} L/min / 75%={PressureDropFlowPoint(0.75):F2} L/min / 100%={PressureDropFlowPoint(1.00):F2} L/min";
+    public bool IsAntiCollapseSelected => SelectedItem?.Clause == "4.3.2";
+    public bool HasAntiCollapseBaseline => _antiCollapseBaselinePressureDrop.HasValue && _antiCollapseBaselineFlow.HasValue;
+    public string AntiCollapseBaselineDisplay => HasAntiCollapseBaseline
+        ? $"基线 ΔP {_antiCollapseBaselinePressureDrop:F1} mmHg / 流量 {_antiCollapseBaselineFlow:F2} L/min / 时间 {_antiCollapseBaselineCapturedAt:HH:mm:ss}"
+        : "尚未采集基线";
+    public string AntiCollapseComparisonDisplay
+    {
+        get
+        {
+            var comparison = GetAntiCollapseComparison();
+            return comparison.HasBaseline
+                ? $"当前 ΔP {DeltaPressure:F1} mmHg，较基线增加 {comparison.Increase:F1} mmHg ({comparison.IncreaseRate:F1}%)，{comparison.StatusText}"
+                : "请先在无负压条件下采集基线，再进行负压比较";
+        }
+    }
 
     public double PumpFlow => ChannelValue("主泵流量");
     public double DrainageFlow => ChannelValue("静脉引流流量");
@@ -185,6 +206,10 @@ public partial class MainViewModel : ObservableObject
         OnPropertyChanged(nameof(SelectedItemCaptureModeText));
         OnPropertyChanged(nameof(SelectedItemMeasurementSource));
         OnPropertyChanged(nameof(SelectedItemUsesRealtimeValue));
+        OnPropertyChanged(nameof(IsAntiCollapseSelected));
+        OnPropertyChanged(nameof(HasAntiCollapseBaseline));
+        OnPropertyChanged(nameof(AntiCollapseBaselineDisplay));
+        OnPropertyChanged(nameof(AntiCollapseComparisonDisplay));
         OnPropertyChanged(nameof(RealtimeMeasurementHint));
         OnPropertyChanged(nameof(SelectedItemLiveDisplay));
         OnPropertyChanged(nameof(SelectedItemLiveHint));
@@ -211,6 +236,65 @@ public partial class MainViewModel : ObservableObject
         ItemSearchText = string.Empty;
     }
 
+    [RelayCommand]
+    private void CaptureAntiCollapseBaseline()
+    {
+        if (!IsAntiCollapseSelected)
+        {
+            LatestAction = "当前选择的不是抗塌陷项目。";
+            return;
+        }
+
+        _antiCollapseBaselinePressureDrop = DeltaPressure;
+        _antiCollapseBaselineFlow = PumpFlow;
+        _antiCollapseBaselineCapturedAt = DateTime.Now;
+        _lastAutoAntiCollapseResult = string.Empty;
+        _lastAutoAntiCollapseNote = string.Empty;
+
+        var baselineText = BuildAntiCollapseMeasuredText();
+        var noteText = BuildAntiCollapseRecordNote();
+        ResultValue = baselineText;
+        ResultNote = noteText;
+        LatestAction = $"已采集抗塌陷基线：ΔP {DeltaPressure:F1} mmHg，流量 {PumpFlow:F2} L/min。";
+        TraceEvents.Insert(0, NewTrace("抗塌陷基线", $"ΔP {DeltaPressure:F1} mmHg / 流量 {PumpFlow:F2} L/min"));
+
+        OnPropertyChanged(nameof(HasAntiCollapseBaseline));
+        OnPropertyChanged(nameof(AntiCollapseBaselineDisplay));
+        OnPropertyChanged(nameof(AntiCollapseComparisonDisplay));
+    }
+
+    [RelayCommand]
+    private void CaptureAntiCollapseComparison()
+    {
+        if (!IsAntiCollapseSelected)
+        {
+            LatestAction = "当前选择的不是抗塌陷项目。";
+            return;
+        }
+
+        if (!HasAntiCollapseBaseline)
+        {
+            LatestAction = "请先采集抗塌陷基线。";
+            return;
+        }
+
+        var resultText = BuildAntiCollapseMeasuredText();
+        var noteText = BuildAntiCollapseRecordNote();
+        var comparison = GetAntiCollapseComparison();
+
+        ResultValue = resultText;
+        ResultNote = noteText;
+        SelectedResultStatusText = comparison.StatusText.StartsWith("合格", StringComparison.Ordinal) ? "合格"
+            : comparison.StatusText.StartsWith("预警", StringComparison.Ordinal) ? "预警"
+            : "不合格";
+        _lastAutoAntiCollapseResult = resultText;
+        _lastAutoAntiCollapseNote = noteText;
+        LatestAction = $"已采集抗塌陷负压比较：增幅 {comparison.IncreaseRate:F1}% ，{comparison.StatusText}。";
+        TraceEvents.Insert(0, NewTrace("抗塌陷比较", $"增量 {comparison.Increase:F1} mmHg / 增幅 {comparison.IncreaseRate:F1}%"));
+
+        OnPropertyChanged(nameof(AntiCollapseComparisonDisplay));
+    }
+
     [RelayCommand]
     private void ToggleAcquisition()
     {
@@ -387,9 +471,9 @@ public partial class MainViewModel : ObservableObject
 
     private void RefreshTelemetryPanel()
     {
-        var inletPressure = Channels.First(c => c.Name == "入口压力").Value;
-        var outletPressure = Channels.First(c => c.Name == "出口压力").Value;
-        DeltaPressure = inletPressure - outletPressure;
+        var distalPressure = Channels.First(c => c.Name == "远端压力").Value;
+        var proximalPressure = Channels.First(c => c.Name == "近端压力").Value;
+        DeltaPressure = proximalPressure - distalPressure;
         OnPropertyChanged(nameof(PumpFlow));
         OnPropertyChanged(nameof(DrainageFlow));
         OnPropertyChanged(nameof(ReturnFlow));
@@ -405,6 +489,7 @@ public partial class MainViewModel : ObservableObject
         OnPropertyChanged(nameof(WhiteCellLossDisplay));
         OnPropertyChanged(nameof(PressureDropConditionDisplay));
         OnPropertyChanged(nameof(PressureDropFlowPointDisplay));
+        OnPropertyChanged(nameof(AntiCollapseComparisonDisplay));
         OnPropertyChanged(nameof(PumpFlowLoadDisplay));
         OnPropertyChanged(nameof(DrainageFlowLoadDisplay));
         OnPropertyChanged(nameof(ReturnFlowLoadDisplay));
@@ -489,6 +574,31 @@ public partial class MainViewModel : ObservableObject
             pressureItem.Status = pressureStatus;
         }
 
+        var antiCollapseItem = InspectionItems.FirstOrDefault(item => item.Clause == "4.3.2");
+        if (antiCollapseItem is not null)
+        {
+            UpdateAntiCollapseBaseline();
+
+            if (SelectedItem == antiCollapseItem)
+            {
+                var suggestedResult = BuildAntiCollapseMeasuredText();
+                var suggestedNote = BuildAntiCollapseRecordNote();
+
+                if (string.IsNullOrWhiteSpace(ResultValue) || ResultValue == _lastAutoAntiCollapseResult)
+                {
+                    ResultValue = suggestedResult;
+                }
+
+                if (string.IsNullOrWhiteSpace(ResultNote) || ResultNote == _lastAutoAntiCollapseNote)
+                {
+                    ResultNote = suggestedNote;
+                }
+
+                _lastAutoAntiCollapseResult = suggestedResult;
+                _lastAutoAntiCollapseNote = suggestedNote;
+            }
+        }
+
         var recirculationItem = InspectionItems.FirstOrDefault(item => item.Clause == "4.3.3");
         if (recirculationItem is null)
         {
@@ -601,7 +711,7 @@ public partial class MainViewModel : ObservableObject
         return (SelectedItem.Clause, SelectedItem.Item) switch
         {
             ("4.3.1", _) => BuildPressureDropLiveDisplay(),
-            ("4.3.2", _) => $"负压 {ChannelValue("负压辅助引流"):F1} kPa / 压差 {DeltaPressure:F1} mmHg / 流量差 {Math.Abs(PumpFlow - ReturnFlow):F2} L/min",
+            ("4.3.2", _) => BuildAntiCollapseLiveDisplay(),
             ("4.3.3", _) => $"再循环率 {RecirculationRate:F1}% / 引流 {DrainageFlow:F2} / 回输 {ReturnFlow:F2} L/min",
             ("4.3.4", "血细胞破坏") => $"游离血红蛋白 {ChannelValue("游离血红蛋白"):F3} g/L / 温度 {ChannelValue("模拟血液温度"):F1} °C",
             ("4.3.4", "血小板/白细胞减少率") => $"白细胞减少率 {ChannelValue("白细胞减少率"):F1}% / 温度 {ChannelValue("模拟血液温度"):F1} °C",
@@ -611,13 +721,13 @@ public partial class MainViewModel : ObservableObject
 
     private string BuildPressureDropMeasuredText()
     {
-        var inletPressure = ChannelValue("入口压力");
-        var outletPressure = ChannelValue("出口压力");
+        var distalPressure = ChannelValue("远端压力");
+        var proximalPressure = ChannelValue("近端压力");
 
         return
             $"试验条件：{PressureDropConditionDisplay}\n" +
             $"流量点：{PressureDropFlowPointDisplay}；当前 {PumpFlow:F2} L/min\n" +
-            $"压力测量：入口 {inletPressure:F1} mmHg；出口 {outletPressure:F1} mmHg\n" +
+            $"压力测量：近端 {proximalPressure:F1} mmHg；远端 {distalPressure:F1} mmHg\n" +
             $"压力降 ΔP：{DeltaPressure:F1} mmHg";
     }
 
@@ -641,9 +751,99 @@ public partial class MainViewModel : ObservableObject
         return
             $"条件：{PressureDropConditionDisplay}\n" +
             $"流量点：{PressureDropFlowPointDisplay}\n" +
-            $"当前：主泵 {PumpFlow:F2} L/min / 入口 {ChannelValue("入口压力"):F1} mmHg / 出口 {ChannelValue("出口压力"):F1} mmHg / ΔP {DeltaPressure:F1} mmHg";
+            $"当前：主泵 {PumpFlow:F2} L/min / 近端 {ChannelValue("近端压力"):F1} mmHg / 远端 {ChannelValue("远端压力"):F1} mmHg / ΔP {DeltaPressure:F1} mmHg";
+    }
+
+    private void UpdateAntiCollapseBaseline()
+    {
+        var negativePressure = ChannelValue("负压辅助引流");
+
+        if (_antiCollapseBaselinePressureDrop is null || negativePressure >= -1.0)
+        {
+            _antiCollapseBaselinePressureDrop = DeltaPressure;
+            _antiCollapseBaselineFlow = PumpFlow;
+            _antiCollapseBaselineCapturedAt = DateTime.Now;
+            OnPropertyChanged(nameof(HasAntiCollapseBaseline));
+            OnPropertyChanged(nameof(AntiCollapseBaselineDisplay));
+            OnPropertyChanged(nameof(AntiCollapseComparisonDisplay));
+        }
+    }
+
+    private string BuildAntiCollapseLiveDisplay()
+    {
+        var comparison = GetAntiCollapseComparison();
+        var baselineText = comparison.HasBaseline
+            ? $"基线 ΔP {comparison.BaselinePressureDrop:F1} mmHg @ {comparison.BaselineFlow:F2} L/min"
+            : "基线待采集（请先在无负压条件下运行）";
+
+        var increaseText = comparison.HasBaseline
+            ? $"增量 {comparison.Increase:F1} mmHg / 增幅 {comparison.IncreaseRate:F1}% / 判定 {comparison.StatusText}"
+            : "尚无法比较增幅";
+
+        return
+            $"条件：模拟血液 2.0~3.5 mPa·s / {TemperatureDisplay} / 目标负压 {AntiCollapseTargetNegativePressure:F2} kPa\n" +
+            $"当前：负压 {NegativeAssistPressureDisplay} / 主泵 {PumpFlow:F2} L/min / ΔP {DeltaPressure:F1} mmHg\n" +
+            $"{baselineText}\n" +
+            $"{increaseText}";
+    }
+
+    private string BuildAntiCollapseMeasuredText()
+    {
+        var comparison = GetAntiCollapseComparison();
+        var baselineText = comparison.HasBaseline
+            ? $"{comparison.BaselinePressureDrop:F1} mmHg"
+            : "未采集";
+        var increaseText = comparison.HasBaseline
+            ? $"{comparison.Increase:F1} mmHg ({comparison.IncreaseRate:F1}%)"
+            : "无法比较";
+
+        return
+            $"试验条件：模拟血液 2.0~3.5 mPa·s，{TemperatureDisplay}，有效长度处于 37±2 ℃ 条件\n" +
+            $"基线测量：最大血流量 {comparison.BaselineFlow:F2} L/min，压力降 {baselineText}\n" +
+            $"负压加载：远端施加 {NegativeAssistPressureDisplay}（目标 {AntiCollapseTargetNegativePressure:F2} kPa）\n" +
+            $"比较结果：当前压力降 {DeltaPressure:F1} mmHg，较基线增加 {increaseText}\n" +
+            $"建议判定：{comparison.StatusText}";
+    }
+
+    private string BuildAntiCollapseRecordNote()
+    {
+        var comparison = GetAntiCollapseComparison();
+        var baselineCapturedText = _antiCollapseBaselineCapturedAt?.ToString("yyyy-MM-dd HH:mm:ss") ?? "未采集";
+
+        return
+            $"录入建议：先在无负压条件下采集基线压力降，再在远端施加 -6.67 kPa 负压后记录比较值。\n" +
+            $"当前基线时间：{baselineCapturedText}；基线流量 {comparison.BaselineFlow:F2} L/min；当前流量 {PumpFlow:F2} L/min。\n" +
+            $"判定规则：负压后压力降增幅不超过基线 50% 为合格；当前比较结果为 {comparison.StatusText}。";
+    }
+
+    private AntiCollapseComparison GetAntiCollapseComparison()
+    {
+        if (_antiCollapseBaselinePressureDrop is null || _antiCollapseBaselineFlow is null)
+        {
+            return new AntiCollapseComparison(false, 0, 0, 0, 0, "等待基线");
+        }
+
+        var baseline = _antiCollapseBaselinePressureDrop.Value;
+        var increase = DeltaPressure - baseline;
+        var increaseRate = baseline <= 0 ? 0 : increase / baseline * 100d;
+        var statusText = increaseRate switch
+        {
+            <= 50 => "合格",
+            <= 60 => "预警，建议复测",
+            _ => "不合格，压降增幅超限"
+        };
+
+        return new AntiCollapseComparison(true, baseline, _antiCollapseBaselineFlow.Value, increase, increaseRate, statusText);
     }
 
     private double PressureDropFlowPoint(double ratio) =>
         Channels.First(channel => channel.Name == "主泵流量").Max * ratio;
+
+    private readonly record struct AntiCollapseComparison(
+        bool HasBaseline,
+        double BaselinePressureDrop,
+        double BaselineFlow,
+        double Increase,
+        double IncreaseRate,
+        string StatusText);
 }